ajaya kumar nayakjbmse.org/ajayakumarnayakcv.pdfdr ajaya kumar nayak, is currently an associate...
TRANSCRIPT
1
Ajaya Kumar Nayak
Biographical notes
Dr Ajaya Kumar Nayak, is currently an Associate Professor, Civil Engineering Department, Veer
Surendra Sai University of Technology, Burla since May 2015 after working as an Assistant Professor
Civil Engineering Department, Veer Surendra Sai University of Technology, Burla for about six months.
He was a Reader in Civil Engineering Department, VSSUT, Burla for about three years and two months
after working as an Associate Professor, Civil Engineering Department, KIIT University, Bhubaneswar
for about two months. He was a Lead Engineer, Material Mechanics Laboratory, Material System
Technologies, General Electric Global Research, Bangalore, India for two and half years after working as
a Research Associate in Center for Composite Materials, University of Delaware, USA for Six Months.
Previously He worked as a Research Fellow, Ship Science, School of Engineering Sciences, University of
Southampton, UK for five and half years. He received a Bachelor of Engineering Degree with Honors in
Civil Engineering from the National Institute of Technology, Rourkela, India, 1994, Master of Civil
Engineering Degree with a specialization in Structures from the Indian Institute of Science, Bangalore,
India, 1999 and a PhD in Composite Materials and Structures from the School of Civil Engineering and
the Environment and Ship Science, School of Engineering Sciences, University of Southampton, UK in
2002. He has about two years civil engineering industry experience in India prior to joining Master of
Engineering degree program. He has more than 55 publications including 10 peer reviewed journal
papers, 5 working journal papers and two book chapters. He has guided five Master of Technology
Degree students in Structural Engineering Specialisation in VSSUT, Burla. Currently two students are
pursuing for PhD degrees under his guidance. He was an Examiner for a PhD degree student from IISc,
Bangalore and for Master Degree students in PG Department of Environmental Sciences, Sambalpur
University. He has about three years Teaching experience during the time at General Electric Global
Research, Bangalore, India and University of Southampton, UK. His current research interests are in the
Mechanics, Composites, Structural health monitoring, Processing, Reliability and safety, Fracture and
fatigue, Design. His teaching interests are in the Finite element analysis and Optimization, Failure of
materials, Structural Integrity, Marine safety and environmental engineering, Mechanics, Structures and
materials, Theory of plate structures and Structural analysis. He is also involved in design,
conceptualization, reverse engineering and project management. His background combines excellent
communication, problem solving, functional/technical, intellectual, action oriented, quick technical
learning, time management and peer relationship skills.
Contact Address
3R/29, Professors’ Colony
VSSUT, Burla, 768018, Sambalpur, Odisha
Ph No: +91(0) 9777460423
E-mail: [email protected]
2
Education
PhD, School of Civil Engineering and the Environment and Ship Science, School of Engineering
Sciences, University of Southampton, UK., 1999-2002
Master of Engineering, Civil Engineering (Structures), Indian Institute of Science Bangalore, India,
CGPA 6.8/8, 1997 – 1999
Bachelor of Engineering, Civil Engineering (Honors), National Institute of Technology Rourkela,
India, 81.5 %, 1990 – 1994
Research Interests
1. Mechanics
2. Composites
3. Structural Health Monitoring
4. Processing
5. Reliability and Safety
6. Fracture and Fatigue
7. Design
Teaching Interests
1. Finite element analysis and Optimization
2. Failure of materials
3. Structural Integrity
4. Marine safety and environmental engineering
5. Mechanics
6. Structures and materials
7. Theory of plate structures
8. Structural analysis
9. Advanced Reinforced Concrete Design
10. Advanced Design of Steel Structures
11. Theory of Elasticity and Plasticity
12. Earthquake Analysis and Design
3
Experience
May 15 – Till Date: Associate Professor, Civil Engineering Department, VSSUT, Burla, India.
November 2014- April 2015: Assistant Professor, Civil Engineering Department, VSSUT, Burla,
India.
September 2011-October 2014: Reader, Civil Engineering Department, VSSUT, Burla, India.
July 2011-August 2011: Associate Professor, Civil Engineering Department, KIIT University,
Bhubaneswar, India.
December 2010-April 2011: Research Interaction, Ship Science, School of Engineering Sciences,
University of Southampton, UK.
May 2008-November 2010: Lead Engineer, Material Mechanics Laboratory, Material System
Technologies, General Electric Global Research, Bangalore, India.
March 2008-April 2008: Research Interaction, Civil Engineering (Structures), Indian Institute of
Science, Bangalore, India.
September 2007-February 2008: Research Associate, Center for Composite Materials,
University of Delaware, USA.
April 2002-August 2007: Research Fellow, Ship Science, School of Engineering Sciences,
University of Southampton, UK.
April 1999-March 2002: Research Assistant, School of Civil Engineering and the Environment,
University of Southampton, UK.
August 1997-January 1999: Research Assistant, Civil Engineering (Structures), Indian Institute
of Science, Bangalore, India.
August 1994-October 1995: Construction Engineer, M/s Unitech Limited, New Delhi, India.
August 1994-May 1995: Management Trainee, M/s Unitech Limited, New Delhi, India.
Teaching Experience
: Structural Mechanics, School of Civil Engineering and the Environment, University of
Southampton, UK.
: Structural Integrity, Ship Science, School of Engineering Sciences, University of
Southampton, UK.
: Marine Safety and Environmental Engineering, Ship Science, School of Engineering
Sciences, University of Southampton, UK.
: Mechanical Behavior of Materials, General Electric Global Research, Bangalore, India.
: Finite Element Analysis and Optimisation, General Electric Global Research, Bangalore,
India.
: Structural Dynamics and Earthquake Engineering, UG Course, Civil Engineering Department,
VSSUT, Burla.
: Structural Analysis-II, UG Course, Civil Engineering Department, VSSUT, Burla.
:Structural Design, UG Course, Civil Engineering Department, VSSUT, Burla.
4
: Steel Structures, UG Course, Civil Engineering Department, VSSUT, Burla.
: Advanced Structural Design, UG Course, Civil Engineering Department, VSSUT, Burla.
: Concrete Structures II, UG Course, Civil Engineering Department, VSSUT, Burla.
:Theory of Elasticity and Plasticity, UG Course, Civil Engineering Department, VSSUT, Burla.
:Civil Engineering Materials for Construction, UG Course, Civil Engineering Department,
VSSUT, Burla.
:Advanced Reinforced Concrete Design, PG Course (Structures), Civil Engineering
Department, VSSUT, Burla.
:Advanced Design of Steel Structures, , PG Course (Structures), Civil Engineering Department,
VSSUT, Burla.
: Theory of Elasticity and Plasticity, PG Course (Structures & Geotechnical Engineering), Civil
Engineering Department, VSSUT, Burla.
: Earthquake Analysis and Design, PG Course (Structures & Geotechnical Engineering), Civil
Engineering Department, VSSUT, Burla.
: Structural Analysis, BArch Course, Architecture Department, VSSUT, Burla
: Engineering Mechanics, BArch Course, Architecture Department, VSSUT, Burla
:Building Construction-I, BArch Course, Architecture Department, VSSUT, Burla
: Building Materials-II, BArch Course, Architecture Department, VSSUT, Burla
Publications
Journal Papers
1. A.K. Nayak and A.K. Satapathy, “Stochastic damped free vibration analysis of composite sandwich
plates”, Procedia Engineering, Vol 144, 2016, pp. 1315-1324.
2. J. Munda, P.K. Pradhan and A.K. Nayak, “ A Review on the performance of Modified Cam-Clay
Model for fine grained Soil”, Journal of Civil Engineering and Environmental Technology, Vol
1, 2014, pp.62-67.
3. A.K. Nayak, R.A. Shenoi and J.I.R. Blake, “ A Study of Transient Response of Initially Stressed
Composite Sandwich Folded Plates”, Composites Part B: Engineering, Vol 44, 2013, pp.67-75.
4. A.K. Nayak, R.A. Shenoi and S.S.J. Moy, “Dynamic response of Composite Sandwich Plates
Under In-Plane Stresses”, Composites Part-A: Applied Science and Manufacturing, Vol. 37,
2006, pp.1189-1205.
5. A.K. Nayak, R.A. Shenoi and S.S.J. Moy, “Transient Response of Initially Stressed Composite
Sandwich Plates”, Finite Elements in Analysis and Design, Vol. 42, 2006, pp.821-836.
5
6. A.K. Nayak, S.S.J. Moy and R.A. Shenoi, “A Higher Order Finite Element Theory For Buckling
and Vibration Analysis of Initially Stressed Composite Sandwich Plates”, Journal of Sound and
Vibration, Vol. 286, 2005, pp.763-780.
7. A.K. Nayak and R.A. Shenoi, “Assumed Strain Finite Elements For Buckling and Vibration
Analysis of Initially Stressed Damped Composite Sandwich Plates”, Journal of Sandwich
Structures and Materials, Vol. 7, 2005, pp.307-334.
8. A.K. Nayak, R.A. Shenoi and S.S.J. Moy, “Transient Response of Composite Sandwich Plates”,
Composite Structures, Vol. 64, 2004, pp.249-267.
9. A.K. Nayak, S.S.J. Moy and R.A. Shenoi, “Quadrilateral Finite Elements for Multi-layer
Sandwich Plates”, Journal of Strain Analysis for Engineering Design, Vol. 38, 2003, pp.377-
394.
10. A.K. Nayak, S.S.J. Moy and R.A. Shenoi, “Free Vibration Analysis of Composite Sandwich
Plates Based on Reddy's Higher-Order Theory”, Composites Part B: Engineering, Vol. 33, 2002,
pp. 505-519.
11. A.K. Nayak, R.A. Shenoi and S.S.J. Moy, “Analysis of Damped Composite Sandwich Plates
Using Plate Bending Elements with Substitute Shear Strain Fields Based on Reddy's Higher-
Order Theory”, Proceedings of The Institute of Mechanical Engineers, Journal of Mechanical
Engineering Sciences, Vol. 216, 2002, pp.591-606.
Working Journal Papers
12. A.K. Nayak, R.A. Shenoi, J.I.R. Blake and O. Prakash, “Thermal Stresses in Laminated
Composite Plates”, to be submitted to Journal of Thermal Stresses.
13. A.K. Nayak, R.A. Shenoi, J.I.R. Blake, J.W. Gillespie Jr., D. Heider and E. Madenci, “Thermo-
transient Response of Composite Sandwich Shells”, to be submitted to Composite Structures.
14. A.K. Nayak, R.A. Shenoi and J.I.R. Blake, “Damping Response of Composite Sandwich Folded
Plates”, to be submitted to Journal of Composite Materials.
15. A.K. Nayak, R.A. Shenoi and J.I.R. Blake, “Transient Response of Laminated Composite Plates
With CutOuts”, to be submitted to Journal of Sound and Vibration.
16. A.K. Nayak, R.A. Shenoi, J.I.R. Blake, R. Gupta, S. Subramanian, J. Zhu, X. Fang, R. Mills, W.
Lin and S. Finn, “A Study of Stresses in Thermoplastic Composite Sandwich Plates”, to be
submitted to Journal of Thermoplastic Composite Materials.
6
Conference Papers-Refereed
17. A.K. Nayak, S.S.J. Moy and R.A. Shenoi, “Damping Prediction of Sandwich Plates Using The
Finite Element Method”, 2nd
International Conference on Theoretical, Applied, Computational
and Experimental Mechanics, (ICTACEM 2001), IIT Kharagpur, India, December 2001, Paper
No: 104, pp.1-12.
18. A.K. Nayak, R.A. Shenoi and S.S.J. Moy, “Damping Prediction of Composite Sandwich Plates
Using Assumed Strain Plate Bending Elements Based on Reddy's Higher-Order Theory”, 43rd
AIAA/ASME/ASCE/AHS Structures, Structural Dynamics and Materials Conference, Denver,
USA, April 2002, Paper No: 1243, pp.1-11.
19. A.K. Nayak, R.A. Shenoi, S.S.J. Moy and J.R. Blake, “Transient Analysis of Composite
Sandwich Plates Using Assumed Strain Plate Bending Elements Based on Reddy's Higher-Order
Theory”', Proceedings of 1st International Conference on Advanced Polymer Composites for
Structural Applications in Construction (ACIC 2002), University of Southampton, UK, April
2002, pp. 347-357.
20. A.K. Nayak, S.S.J. Moy and R.A. Shenoi, “A Study of the Effect of Initial In-Plane Stresses on
Vibration and Buckling Behaviour of Damped Composite Sandwich Plates”, Sixth International
Conference on Sandwich Structures, Ft. Lauderdale, Florida, USA, March 31-April 02, 2003, pp.
1006-1015.
21. A.K. Nayak, S.S.J. Moy and R.A. Shenoi, “Buckling and Vibration Analysis of Initially Stressed
Composite Sandwich Plates”, Eighth International Conference on Recent Advances in Structural
Dynamics, University of Southampton, UK, July 2003, paper No:21, pp. 1-12.
22. A.K. Nayak, S.S.J. Moy and R.A. Shenoi, “Dynamic Response of Initially Stressed Composite
Sandwich Plates”, Proceedings of 2nd
International Conference on Advanced Polymer
Composites for Structural Applications in Construction (ACIC 2004), University of Surrey, UK,
22-24April 2004, pp. 1-10.
23. A.K. Nayak and R.A. Shenoi, “Assumed Strain Higher Order Shell Elements For Damped
Composite Sandwich Shells”, First International Congress on Computational Mechanics and
Simulation (ICCM04), IIT Kanpur, December 2004, pp.158-165.
24. A.K. Nayak and R.A. Shenoi, “A Higher Order Assumed Strain Finite Element For Transient
Analysis of Initially Stressed Composite Sandwich Plates”, 3rd
International Conference on
Theoretical, Applied, Computational and Experimental Mechanics, (ICTACEM 2004), IIT
Kharagpur, India, December 2004, pp.1-14.
7
25. A.K. Nayak and R.A. Shenoi, “Free Vibration Analysis of Composite Sandwich Shells Using
Higher Order Shell Elements”, AIAA-2005-1837 46th AIAA/ASME/ASCE/AHS Structures,
Structural Dynamics and Materials Conference, Texas, USA, April 2005.
26. A.K. Nayak, R.A.Shenoi and J.I.R Blake, “Transient analysis of initially stressed folded
composite sandwich plate structures using a vortex shell element”, 3rd
International Conference
on Advanced Composites In Construction ACIC2007, University of Bath, UK.
27. A.K. Nayak, “Damping Analysis of Composite Folded Plate Structures Using a Vortex Shell
Element”, AIAA-2007- 48th AIAA/ASME/ASCE/AHS Structures, Structural Dynamics and
Materials Conference, Texas, USA, April 2007.
28. A.K. Nayak, “Elasto-Plastic Analysis of Initially-Stressed Plates Using a 3D Degenerated
Mindlin-Kirchhoff Shell Element”, AIAA-2007- 48th AIAA/ASME/ASCE/AHS Structures,
Structural Dynamics and Materials Conference, Texas, USA, April 2007.
29. K. Chandraseker, D. Patro, A.K. Nayak, S.C. Quek and C.S. Yerramalli, “Scaling Studies in
Modeling For Compressive Strength of Thick Composite Structures”, ASME Mechanical
Engineering Conference, Vancouver, Canada, November 2010.
30. S. Singh and A.K. Nayak, “Stochastic Analysis of A Single Lap Joint Including Material and
Geometric Nonlinearity”, National Conference on Recent Advances in Mechanics and Materials-
(RAMM2012), VSSUT, Burla, Sambalpur, Odisha, February 2012.
31. A.K. Nayak, “A transient permeability model for the process modelling in multi-wall carbon
nano-tubes/polyster flow through glass fiber”, National Conference on Recent Advances in
Science for Technology-(RAST2012), VSSUT, Burla, Sambalpur, Odisha, February 2012.
32. A,K, Nayak, R.A.Shenoi, J.I.R. Blake and O. Prakash, “Thermal stress analysis in laminated
composite plates”, International Conference on Strength of Materials (ICSMA16), Indian Institute
of Science, Bangalore, August 2012.
33. A,K, Nayak, R.A.Shenoi, J.I.R. Blake, J.W. Gillespie Jr, D. Heider and E. Madenci, “Thermo-
transient response of composite sandwich shells”, International Conference on Strength of
Materials (ICSMA16), Indian Institute of Science, Bangalore, August 2012.
34. A.K. Nayak, R.A. Shenoi and J.I.R. Blake, “A computer aided FEM Based numerical solution for
transient response of laminated composite plates with cutouts”, International Conference on
Structural Engineering and Mechanics, National Institute of Technology, Rourkela, December
2013.
8
35. A.K. Nayak, R.A. Shenoi, J.I.R. Blake, R. Gupta, S. Subramanian, J. Zhu, X. Fang, R. Mills, W.
Lin and S. Finn, “Stress Analysis of Thermoplastic Composite Sandwich Plates”, International
Conference on Emerging Materials and Processes, CSIR-IMMT, Bhubaneswar, Odisha, 26th -
28th February 2014.
36. A.K. Satapathy and A.K. Nayak, “Stochastic Free Vibration of Composite Sandwich Plates”,
National Conference on Innovations in Design & Construction of Industrial Structures, National
Institute of Technology, Durgapur, April 2014.
37. A.K. Nayak and A.K. Satapathy, “Stochastic Free Vibration Analysis of Variable Thickness
Plates, Prismatic Folded Plates and Curved Shells Using Finite Strip Method”, International
Conference on Advanced Materials Development and Performance, AMDP2017, July 2017
(Accepted for Publication). Savitribai Phule Pune University (Formerly known as University of
Pune).
38. S. Sahu and A.K. Nayak, “Free Vibration Analysis of Anti-Symmetric Composite Sandwich
Plates”, International Conference on Advanced Materials Development and Performance,
AMDP2017, July 2017 (Accepted for Publication). Savitribai Phule Pune University (Formerly
known as University of Pune).
39. A.K. Satapathy and A.K. Nayak, “Stochastic Buckling Analysis of Composite Sandwich Plates”,
13th International Conference on Vibration Problems, ICOVP2017, IIT Guwahati, December
2017 ((Accepted for Publication).
40. A.K. Satapathy and A.K. Nayak, “Stochastic free vibration of thick square plates made of
isotropic, orthotropic, trigonal, monoclinic, hexagonal and triclinic materials”, 13th International
Conference on Vibration Problems, ICOVP2017, IIT Guwahati, December 2017 ((Accepted for
Publication).
41. R. Panigrahi and A.K. Nayak, “A Comparison of the Linear, Quadratic and Cubic Finite Strip
Elements for the Vibration Analysis of Composite Sandwich Plates”, 13th International
Conference on Vibration Problems, ICOVP2017, IIT Guwahati, December 2017 ((Accepted for
Publication).
Working Conference Papers
42. A.K. Satapathy and A.K. Nayak, “Free Vibration of Symmetric Composite Sandwich Plates
Using a Fifteen Node Shear Deformable Triangular Plate Bending Element”, To be submitted to
International Conference on Composite Materials and Structures, ICCMS2017, December 2017,
IIT Hyderabad.
9
43. S. Sahu, R. Panigrahi and A.K. Nayak, “Free Vibration of Initially Stressed Antisymmetric
Composite Sandwich Plates”, To be submitted to International Conference on Composite
Materials and Structures, ICCMS2017, December 2017, IIT Hyderabad.
Workshop Papers-Refereed
44. A.K. Nayak, “A state of art review of super-hydrophobic surfaces”, Workshop on New and Nano-
materials (WNNM-2012), Department of Science and Technology and Odisha Bigyan Academy,
Govt. Of Odisha, Bhubaneswar, January 2012.
Book Chapters
45. A.K. Nayak and R.A. Shenoi, “The Finite Element Analysis of Sandwich Plates and Shells”, in
the Theory and Applications of Sandwich Structures, University of Southampton, Editors: R.A.
Shenoi, A. Groves and Y.D.S. Rajapakse, 2005, pp. 267-286.
46. A.K. Nayak, “Finite Element Modelling for Composite Wind Turbine Blades”, in Recent
Advances in Composite Materials for Wind Turbine Blades, Dr Brahim Attaf (Ed.), 2013, pp. 1-
24.
Books
47. A.N. Nayak and A.K. Nayak, “Advances in Mechanics and Materials”, VSS University of
Technology, Burla, India. (Edited Book), February 2012.
Technical Reports and Theses
48. R.A. Shenoi, P.K. Das, A.K. Nayak and J.I.R. Blake, “Safe Design of Composite Structures: A
Stochastic Approach”, Report Submitted to Ministry of Defence and British Maritime
Technology Limited, UK, 2007.
49. A.K. Nayak, G. Makarov, R.A. Shenoi and A. Groves, “Unconventional Structures with Hybrid
Materials with Superelastic Inserts”, Report Submitted to Defence Science and Technological
Laboratory, Ministry of Defence, UK, 2005.
50. A.K. Nayak, “On Dynamic Analysis of Laminated Composite and Sandwich Plates Using Finite
Element Method”, PhD Thesis, School of Civil Engineering and the Environment, Ship Science,
School of Engineering Sciences, University of Southampton, UK, March 2002.
10
51. A.K. Nayak, “Nonlinear Finite Element Analysis of Visco-Plastic Axi-Symmetric Lap Joints”,
Master of Engineering Dissertation, Civil Engineering (Structures), Indian Institute of Science,
Bangalore, India, January 1999.
52. A.K. Nayak, “Behaviour of Reinforced Concrete Beams Under Shear and Computer Aided
Analysis of Plane Frames”, Bachelor of Engineering Thesis, Civil Engineering, National
Institute of Technology, Rourkela, India, April 1994.
53. A.K. Nayak, J.W. Gillespie Jr., D. Heider and E. Madenci “Thermo-transient Analysis of
Composite Sandwich Shells by Using a Closed Form First Order Theory”, Center for Composite
Materials, University of Delaware, USA, Internal Report 2008.
54. A.K. Nayak, J.W. Gillespie Jr. and D. Heider, “Testing and Analysis of T-Joint under Tensile
Loading”, Center for Composite Materials, University of Delaware, USA, Internal Report 2008.
55. A.K. Nayak and O. Prakash, “Thermal Stress Analysis of Laminated Composite Plates”, General
Electric Global Research, Internal Report 2008.
56. A.K. Nayak and O. Prakash, “High Performance Structures with Shape Memory Alloy Inserts”,
General Electric Global Research, Internal Report 2008.
57. K. Chandrasekhar, D. Patro, A.K. Nayak, S.C. Quek and C.S. Yerramalli, “Scaling Studies in
Modeling for Compressive Strength of Thick Composite Structures”, General Electric Global
Research, Internal Report 2010.
58. A.K. Nayak, Y. Yoon and M. Vermilyea, “Through thickness 8552 epoxy resin infusion in T700S
Carbon Tows: A Process Modeling Approach”, General Electric Global Research, Internal
Report 2010.
59. A.K. Nayak, R. Gupta, S. Subramanian, J. Zhu, X. Fang, R. Mills, W. Lin and S. Finn, “A Study
of Alternate Failure Modes in Thermoplastic Composite Sandwich Panels”, General Electric
Global Research, Internal Report 2010.
60. S. Singh and A.K. Nayak, “Stochastic Analysis of a Single Lap Joint Including Material and
Geometric Nonlinearity”, General Electric Global Research, Internal Report 2010.
61. S. Ahmad, P. Mahajan, D. Patro, A.K. Nayak and S. Subramanian, “Stochastic Analysis of
Composite Structures: A Critical Review”, General Electric Global Research, Internal Report
2010.
62. J. Rudd, R. Mahadevan and A.K. Nayak, “Durability of Super-Hydrophobic Surfaces'', General
Electric Global Research, Internal Report 2010.
11
63. K. Chandrashekhar, C. Yerramalli, S.C. Quek, D. Patro, A.K. Nayak and S. Subramanian
“Stochastic Compression Response of Defect Laminates Using Micromechanical Models”,
General Electric Global Research, Internal Report 2010.
PhD Guidance On Going
J Munda, “Critical State of Soils ”, Joint Guidance with Prof P.K. Pradhan, Civil Engineering
Department, VSSUT, Burla. Status: PhD Registration done after completing the course works
One Journal paper published on “A Review on the performance of Modified Cam Clay Model for
fine grained soil” authored by J. Munda, P.K. Pradhan and A.K. Nayak, Journal of Civil
Engineering and Environmental Technology, 1(5), 2014, pp 62-67.
A.K. Satapathy, “Analysis of Composite Structures”, VSSUT, Burla, (Guide) Status: the course
works are complete, PhD Registration to be done, One Conference paper published on
“Stochastic free vibration analysis of composite sandwich plates”, authored by A.K. Satapathy
and A.K. Nayak, National Conference on Innovations in Design & Construction of Industrial
Structures, April 2014, NIT Durgapur India, pp. 83-88.
MTech Theses Guided
S.K. Patel, “Optimisation of Laminated Panels using Closed Form solution and the Finite
Element Method”, VSSUT, Burla, June 2013
R. Nayak, “Transient Analysis of Panels Using the Finite Element Method”, VSSUT, Burla, June
2013
P. P. Swain, “Stochastic Analysis of Laminated Panels Using Closed Form Solution and the
Finite Element Method”, VSSUT, Burla, December 2013.
A. Pal, “Transient Response of Plate Panels Using Closed Form Solution and the Finite Element
Method”, VSSUT, Burla, June 2014.
B. Das, “Free Vibration Analysis of Panels Using Closed Form Solution and the Finite Strip
Method”, VSSUT, Burla, June 2014.
K. Rambabu, “Dynamic Response of Panels Using Three Dimensional Finite Element Method”,
VSSUT, Burla, May 2016.
12
S. Sahu, “Dynamic Analysis of Unsymmetrically Laminated Plates Using the Finite Element
Method”, VSSUT, Burla, December 2016.
R. Panigrahi, “Free Vibration and Buckling Analysis of Composite Sandwich Plates Using Finite
Strip and Finite Element Procedures”, VSSUT, Burla, June 2017.
MTech Guidance Ongoing
A. Panda, “Nonlinear Analysis of Adhesively Bonded Lap Joints”, To be Completed by June
2018
A. Mohanty, “Nonlinear Analysis of Composite Sandwich Plates”, To be Completed by June
2018
BTech Theses Guided
S. Singh, Stochastic analysis of a single lap joint including geometrical and material nonlinearity,
BITS Pilani, 2009
U. Pradhan, S. Sahoo, A. Nayak, S. Jena, J.K. Balabantaray, B.K. Panda, S. Sethi & D. Tibrewal,
Dynamic analysis of beams using the finite element method, VSSUT, Burla, 2013
A. Gantayat, G. Badatya, S.P. Nayak, S.K. Nayak, S.R. Bisoi, Free vibration analysis of plates
and plane frames using the finite element method, VSSUT, Burla, 2014.
A, Agrawal, A.K. Karn, D. Sharma, Analysis of plane frames and plates under dynamic loading
conditions using the finite element method, VSSUT, Burla, 2015.
K.R. Mishra and M. Tripathy, Plasticity Analysis of Beams and Plane Frames Using The Finite
Element Method, VSSUT, Burla, 2016.
J.P. Behera, S. Akshit, S. Panda, A. Sahu, S. Behera, D. Sahoo, Static Analysis of Plane Elasticity
Problems Using the Boundary Element, Element Free Galerkin and The Finite Element Method.
VSSUT, Burla, 2017
Short Term Courses
Attended Short term International PhD Course on Introduction to Sandwich Structures at
Denmark Technical University, Lyngby, 1999
Resource Person on The Finite Element Analysis of Sandwich Plates and Shells on the theory and
applications of sandwich structures in University of Southampton, UK, 2005.
13
Resource Person on Design of Beams on AICTE approved short term course on Design of steel
structures using IS800-2007 in VSSUT, Burla 2012.
Attended Short term Course on Earthquake Behavior of Structures at National Institute of
Technology, Rourkela, 2013.
Computational Skills
: Programming: FORTRAN (77 and 90), C++
, C, MATLAB
: Engineering: MATLAB, MAPLE, MATHEMATICA
: Operating Systems: MICROSOFT XP, VISTA, WINDOWS7, WINDOWS8, LINUX, UNIX
: Database: MSWORD, EXCEL, POWERPOINT, LATEX
: Analysis Tools: PATRAN, ABAQUS, ANSYS, COMSOL, PAM-RTM
: CAD Tools: CATIA V5, SOLIDWORKS
: Six Sigma Tools: MINITAB, DFSS
Professional Activities
External Examiner for a PhD Thesis from Civil Engineering Department, IISc Bangalore.
External Examiner for MS Theses from PG Department of Environmental Sciences, Sambalpur
University
Reviewer of Journal of Composites Science and Technology.
Reviewer of Journal of Sound and Vibration.
Reviewer of Journal of Aerospace Engineering, IMechE, Part G.
Reviewer of Journal of Reliability and Safety.
Reviewer of Journal of Mechanical Engineering Sciences
Reviewer of Composites Part B: Engineering
Reviewer of Applied Mathematical Modelling
Reviewer of Steel and Composite Structures, An International Journal
Examiner for various UG/PG courses at VSSUT Burla apart from own taught courses
Preparation of a detailed estimate for the work on Construction of Shopping Complex in the Boys
Hostel Campus of VSSUT, Burla for the year 2012-13 and also preparation of detailed estimates
for development of smart class rooms in the University as part of the TEQIP team on Civil
Engineering Works
Acted as a Doctoral Scrutiny Committee, Board of Studies, Training and Placement and Purchase
Committee member in the University.
Organised classes for weaker students out of office working hours
Acted as a Center Supervisor at ITI, Balasore for OJEE 2013
Attended and presented report to the World bank team and concerned committee members as part
of the TEQIP team in 2nd
review meeting of TEQIP Phase-II from 13th and 14
th December 2012
14
Membership of Professional Societies
American Society of Mechanical Engineers
Institute of Electrical and Electronics Engineers
American Institute of Aeronautics and Astronautics
Awards and Honors
1999 Awarded Doctoral Fellowship to carry out Research Work at University of Southampton,
UK.
1997 Ranked 25th (99.41 Percentile) in Graduate Aptitude Test of Engineering-GATE 97 among
5565 examinees towards Master of Engineering Studies in India.
Management Training at M/s Unitech Limited, New Delhi
Undergone training on communication, finance, presentation and influencing skills, time
management, team effectiveness and talent development.
Construction Engineer at M/s Unitech Limited, New Delhi
Construction of a 100m reinforced concrete chimney for Oil & Gas Refineries in India
Construction of a four lane highway from sub-base to pavement level in India
Leadership Training at General Electric Global Research, Bangalore
Lean Six Sigma Green Belt DFSS Training- JFWTC, Bangalore
GEGR Presentation Skills at GE
GEGR IP Skills for Technologists
GEGR Influencing Skills at GRC
Head, Architecture Department, VSSUT, Burla
Introduced New Course Structure and syllabus for 5 BArch degree from 2015-2016
Outline Vision and Mission Statements for Architecture Department
Shared the teaching loads of the department substantially
Created a work culture having a continuous and never ending team spirit.
15
Professor-in-Charge Civil Works, VSSUT, Burla
Got involved in day-to-day civil maintenance work in the University for a better life style
Took great interest in the supply of water to the campus for healthy living
Shared the information towards the completion of the civil works in the University, Halls and
Quarters
Warden, Visakha Hall of Residence, VSSUT, Burla
Started first official Mess in VHR
Introduced Washing Machines in VHR
Economical mess expenditures in VHR
Maintained hygienic conditions in VHR
Winner of inter hostel Illumina 2012 and Rangoli 2013 events
Girls from VHR participated actively in Blood donation camps
Annual Functions cum Farewell to Final year students are organised in 2013 and 2014 in VHR
136 boarders out of 176 boarders are placed in various campus placements in 2013-2014
Vice President, VSSUT, Athletic Club, Burla
Conducted Inter University Sports Meet (IUSM) 2012 & 2014
Conducted Annual Athletic Meets Illumina 2013 & 2014
Gymnasium renovation in 2013
A new university record on Shotput (Gold, 10.97m) was set in ILLUMINA2K13. In NIT
Rourkela Sports Fest 2013, Football Team was Runner’s up while Cricket, Volleyball, Kabbadi
and Table Tennis Teams were placed in third position. In Indian School of Mines Dhanbad 2013
Sports Meet, University team won the Gold in Shotput and Triple Jump, Silver in Shotput and
Bronze in Triple Jump. Both Men and Womens’ Badminton teams were runner’s up in ISM
Dhanbad. Girls from Visakha Hall of Residence (VHR) started Girls NCC first time in the
University in the Independence day 15 August 2012.
Prof. I/C Computational Engineering Lab, Civil Engg. Deptt. VSSUT, Burla
Procured 10 modern desk top computers & UPS adding to the existing 32 desktop computers
Participated in raising the funds for CAD Technology Lab (12.5 Lakhs sanctioned)
Invited quotations for procurement of Staad-Pro, Plaxis and Vision Softwares from prospective
vendors
Initiated repair schedule for mal-functioning computers
16
Advisor, Civil Engineering Society, VSSUT, Burla
Conducted welcome and farewell ceremony for civil engineering graduates and post-graduates
Conducted lectures by experts (Prof MS Rao, Emeritus Professor from VSSUT, Burla and Er GP
Roy, Water Resources Department, Govt of Odisha)
Encouraged students for higher studies (many students took admissions in IITs, NITs, XIMB,
NICMAR and 3 students in USA)
Two students (Mr Abhisek Mohapatra and Mr Smruti Ranjan Bisoi) have been selected from east
zone for final round of National Civil Award competition for Civil/Structural Engineering
Students for the best innovative structural steel design 2013-2014 by INSDAG for the project on
“SKYWALK construction A cost effective solution for pedestrian under my supervision”.
Two students (Mr Deepak Kumar Rout and Mr Saunak Kumar Das) won the Aadhar 2015 Quiz
worth Rs 50,000/- and offer letters from OCL India Ltd organised by KONARK cement and
AIMA.
Strengths
Self-motivated, disciplined, dutiful and having effective communication skills.
References
Dr. S.R. Finn
Chief Engineer, Composites
Material System Technologies
General Electric Global Research
One Research Circle
Niskayuna, New York
NY 12309, USA
Tel No: (+1) 5183874064
Relationship:Mentor
Prof. R.A. Shenoi
Professor, Head
Ship Science
School of Engineering Sciences
University of Southampton
Highfield, Southampton
SO17 1BJ, UK
Tel. No: (+44) 023 80 592356
Relationship:Mentor
Prof. S.S.J. Moy
Professor
School of Civil
Engineering & the Environment
University of Southampton
Highfield, Southampton
SO17 1BJ, UK
Tel No:(+44) 023 80 592846
Relationship:Mentor
Dr. J.I.R. Blake
Associate Professor, Ship Science
School of Engineering Sciences
University of Southampton
Southampton, UK SO17 1BJ
Tel. No: (+44) 023 80 599544
Relationship:Research Colleague
Prof. P.C. Pandey
Professor
Civil Engineering
Indian Institute of Science
Bangalore, India, 560012
Tel No:(+91) 2293 2667
Relationship:Mentor
17
Statement of Research
My background and research interests are in the areas of manufacturing, experimental, analytical and
computational mechanics of materials and structures in strategic applications. My research has focused on
the following areas:
Finite Element Method, Analytical and Experimental Techniques, Composite Plates and Shells, System
Identification, Vibration Control, Stability of Structures, Impact Analysis, Damage Detection and
Structural Health Monitoring, Failure Analysis of Joints, Shape Memory Alloys, Piezo-electric
Composites, Functionally Graded Materials, Manufacturing and Process Modeling of Composite
Structures.
A significant focus of my research has been on the development of innovative manufacturing,
experimental, analytical and computational techniques to analyse and design materials and structures that
are used in various engineering applications. These experimental and numerical methods have been
validated against standard benchmark problems to ascertain their behaviour in both static and dynamic
loading environments. Since defects in structures are predominant during manufacturing stages, a defect
methodology has been established to understand the behaviour of structures in practice. Currently
manufacturing, experimental, analytical and computational techniques are being pursued to study the
reliability analysis of materials and structures.
Research 2002-Present: The aims of the research have been to study the behaviour of materials to
improve the damage tolerance capability of structures under static and dynamic loading environments.
Research I: Engineering and Physical Sciences Research Council, UK Funded Project Composite
sandwich structures are finding usage in many weight related applications due to advantages associated
with the composite materials. One of the key features is to understand the behaviour of sandwich
structures under time dependent loading conditions. The following methodologies are developed to
understand the behaviour of sandwich structures:
developed generic models for vibrational behaviour of sandwich structures
implemented the solutions in a numerical finite element procedural scheme
understood the free vibration of pristine and damaged sandwich beams
characterized the forced vibration features of sandwich plates and beams
Research II: Defence Science Technology Laboratories, UK funded project It is well known that
most fibre-reinforced plastics are brittle in nature and in-plane failure is governed by the elongation at
break. So when the elongation at break of the resin is reached at a location, then the matrix cracks and the
load path redistributes. The matrix crack may be followed by fibre matrix debond and then either a
delamination or fibre failure. Generally when this happens, the laminate may be deemed to have failed.
However, if structural continuity and a minimum level of structural integrity could be maintained through
18
a layer of material that has a high strain to failure, possibly of a nonlinear elasto-plastic nature, then the
composite could take up the load through larger displacements (and corresponding strains). Hence certain
metallic materials such as stainless steel, aluminium or titanium that possess higher strain to failure (or
even superelastic) characteristics could delay the failure limit of conventional GRP composites. Thus if
one/some of the plies in a laminated composite were to be made of a ductile material, then it is possible
that the load carrying capability of a structure could be increased. It is seen that while most polymer
composites have failure strains of under 5 %, metals have a notably better ductile behaviour with strain to
failure of up to 40 %. Thus a combination of composite materials like, for example, woven roving glass
reinforced composite (GRP) and stainless steel in the form of a metallic mesh could offer many
advantages as compared to conventional GRP composite or metal structures. The advantages could
include improved damage tolerance capability, enhanced energy absorption characteristics, stiffness etc.
Metal inserts, which could be in the form of a metallic mesh, could also be used as a means of joining
structural components. Two generic schemes for attachment include inserts (plates, mesh, wires)
protruding out from composite structure providing an external attachment point and inserts encapsulated
by the composite structure. Hence the technique of incorporating metal inserts/attachments in composites
could provide significant improvements in both part performance and fabrication efficiency over bonding
and direct mechanical fastening. The potential for entrapment of the insert within locally tailored
continuous reinforcement giving added strength and durability to the joint also adds to the allure of
assembly through the use of metal inserts.
Due to availability of various forms of metal inserts, the designer has the liberty in choosing various
combinations to suit the design requirements. One possibility could be in the form of a metallic mesh
which could be integrated easily into composite structures to give added ductility to improve their
structural performances. To assess the mechanical behaviour of GRP composites encapsulating metallic
mesh, an experimental investigation is carried out by combining five plies of Woven roving GRP
composite with four plies of stainless steel mesh under tensile progressive loading. Finite element
analysis is carried out in ABAQUS with a shear deformable doubly curved shell element to incorporate
the Hashin type failure criteria of composites along with the Von-Mises failure criteria of metal mesh.
Numerical results are presented to illustrate the present approach. Hence, the following methodologies are
achieved:
developed models for mechanical characterization of brittle laminates with highly ductile metal
inserts
developed and applied progressive damage models to such hybrid laminates
conducted experiments to understand the manufacturing process
Research III: Reliability analysis of composite structures funded by Ministry of Defence, UK and
British Maritime Technology Limited, UK There is increasing interest in the use of lightweight,
polymer composite structures for a variety of applications in underwater structures. These applications are
in the form of single skin stiffened structures as well as monocoque single skin and sandwich
configurations. The structures could potentially be made up using different fibre types, fibre architectures
19
and weaves, resins, core materials; there could be further variations owing to volume fractions and
geometric/topological layouts. Also, there is further choice in processing routes as well. One could
consider the use of low temperature cure prepregs or alternatively consider vacuum assisted resin infusion
moulding. These processes too have many in-built variabilities. Current trends in marine (ship/boat)
design use conservative safety indices based mainly on some limiting strain value. This approach
however does have drawbacks. The limiting strain value (usually an in-plane strain) may not pick up the
load transfer mechanism adequately and hence may not model dominant failure modes adequately.
Currently little or no allowance is made for variabilities in design parameters, processing parameters and
topological indices.
One solution to this problem is to integrate well established reliability techniques with composite
structure design. There are various established techniques to carry out reliability analysis such as FORM,
SORM, Monte Carlo Simulation and depending on the type of problem, one or the other methods can be
applied.. One of the difficult problems in composites will be to define the failure surface for various limit
states and also the uncertainties of different design variables involved in the definition of the limit states.
Surmounting these issues will reduce the level of uncertainty in adopting composites as a construction
material and widen the engineer's choice of design solutions. The strategic goal is to develop a new
stochastic approach to the design of composite structures that is able to account for variations in material
properties, geometric indices and processing techniques, from the component level to the full system
level. The following methodologies are achieved:
A systematic review of system reliability methods is done
A review of system reliability software is carried out
Various models on time-variant reliability are put forward
An example showing how FE methods can be interfaced with FORM/SORM is shown
Reliability analyses of a laminated composite plate under two loading conditions and two ply
orientations are carried out
A sensitivity analysis of the laminated plate shows the greatest influence of load on the
probability of failure followed by material property
Reliability analysis under uniaxial loading are carried out for two example problems.
Research IV: Optimal Design of T-Joints funded by 3-TEX INC and US NAVY at Center for
Composite Materials, University of Delaware, USA Composite materials are used in many strategic
applications due to their high strength and stiffness to weight ratio. Sandwich structures are preferred in
many weight related applications with light weight balsa cores and thin composite skins. Joints are
inevitable in marine vessels to transfer the load through composite assemblies. The joints could be in the
form of bonded and bolted joints. One of the widely used method is the use of T-Joints in marine
applications. The performance of the hull and bulkhead depends on the use of T-joints as a connecting
element. Various loads in the form of wave impact, structural and cargo weight as well as various actions
such as docking and berthing loads act on T-Joints during their operational period. Hence the study of T-
20
Joints has been very vital to understand their load carrying capacity. The following methodologies are
developed:
Fabrication of large scale joining elements for T-Joint: a base line joint was prepared with large
triangular blocks of balsa as a filler material
Preparation of the test matrix: A variety of baseline joining approaches with 3TEX material is
utilized
Manufacturing trials on T-joints: The experimental investigation of core fabrication issues and
related problem with the infusion of the joint was carried out
Flow behaviour during joint fabrication: Corn syrup with a viscosity of 512mPas was infused
from one end to the vent located on the vertical wall of the plexiglass. The arrival time as a
function of location on the balsa core (bottom and top) was recorded
Bulkhead Fabrication: Two large bulkheads were fabricated using a quasi-isotropic lay-up to
produce an approximately thick face sheet on each side
Fabrication of joints: Multiple joint specimens were fabricated
Fabrication of flanges: Several flanges were manufactured using carbon fabric
Joint fabrication and test preparation: The fabricated flanges were adhesively bonded using a
plexus adhesive to the bulkheads. Prior to bonding, the surfaces were treated using acetone to
clean out all unwanted particles that may hinder poor bonding
Mechanical testing: The experiment was conducted on an Instron testing machine. 10 strain gages
were set up on critical points on this part to observe the strain occurring during loading and one
LVDT (Linear Variable Differential Transformer) was used to observe the displacement at the
center of the base panel. Two dial gages were placed on the bolts to check on deflection of the
bolts if any during testing
Finite element model: CATIA V5 was used to evaluate the performance of composites using
three dimensional elements. Later on MSC/PATRAN was used as the pre-processor for T-joint
analysis. For the simulations and post-processing steps, ABAQUS was used. Both plane stress
and plane strain conditions are assumed
Analysis using generalised plane strain elements: A generalised plane strain element was
implemented to evaluate the through thickness stresses of laminates under tensile loading
Research V: Durability of Super-Hydrophobic Surfaces funded by Nano-Advanced Technology
Program, General Electric Energy Super-hydrophobic surfaces are finding usages in many strategic
applications such as contamination prevention, biocompatibility, enhanced lubricity and durability of
materials. The contact angle of pure water on a clean solid surface determines the degree of hydro-
phobicity. The surface energy and roughness of the solid surface influence the water-solid contact angle.
The understanding of phenomenon associated with contact angles along with the development of textured
super-hydrophobic surfaces with varying configurations is crucial for the applications. The following
methodologies are developed:
Contact angle, Contact angle hysteresis and super-hydrophobic surfaces are being studied
21
Critical pressure on model surfaces with grid and square pillars in a rectangular matrix has been
evaluated
Fabrication issues on super-hydrophobic surfaces with square holes and square pillars have been
discussed
Contact angle is measured in a dynamic contact angle analyzer
Hardness is examined on nanoPAA on alumina substrate using a Vickers indentor
Material models for solid alumina and Nano-PAA have been undertaken using ABAQUS
The behaviour of indentation load versus indentation depth is studied
Variation of Young's modulus and Poisson's ratio has been studied with respect to pore size and
pore fraction
The variation of Wetting angle and normalized hardness vis-a-vis pore size and pore fraction has
been investigated
The relative importance of square pack and hexagonal pack has been discussed
For pillars and holes with varying air fractions, three dimensional modelling in PATRAN and
ABAQUS has been carried out to investigate the relative advantages.
Research VI:Scaling Studies in Modeling for Compressive Strength of Thick Composite Structures,
funded under X-Plan Program, General Electric Energy Large composite part thicknesses in some
load bearing applications lead to defects in the form of fiber waves, voids and de-laminations during
manufacturing. It is well known that composite compressive strength is a strong function of fiber
alignment, and fiber waviness can cause failure due to fiber microbuckling and kinking or failure by
splitting at the fiber/resin interface. Hence scaling studies in modelling for compressive strength of thick
composite structures has been important to understand their behaviour. The following methodologies
have been developed:
a micromechanics approach in which individual fiber and resin layers are explicitly modelled in
ANSYS
a tow level approach in which the fiber and resin properties are homogenized to generate
effective properties of a tow in ANSYS
Material properties of epoxy resin has been obtained experimentally
The geometric inputs of defects and elasto-plastic material parameters has been used to generate
the model through ANSYS scripts
The surface and interior defect waves are generated using a combination of a cosine function and
a circular fillet that smoothly transitions the cosine curve to the straight portion of the coupon.
Propagating the surface wave towards the root defect along directions obtained using the surface
and root defect waves generates the intermediate layers. The intermediate layers will be of
uniform thickness only for the case when this propagation direction coincides with the normal at
each point on the cosine curves. For any other direction of propagation, the layers will have non-
uniform thicknesses
22
An inverse geometry calculation is performed over a design space to find the right required input
geometry values that will generate the desired user-input geometries. The user-input geometry is
set as the target with respect to which the cost of deviating is minimized
A nonlinear large deformation analysis is carried out using displacement controlled axial
compressive loading applied to the end faces, each of which is coupled to a multi-point constraint
(MPC) node. The peak load is captured as a nodal reaction load at the point of unloading,
representing a fiber micro-buckling instability
Research VII: A Study of Alternate Failure Modes in Thermoplastic Composite Sandwich Panels,
funded by SABIC Innovative Plastic Inc (formerly GE Plastics) Thermoplastic composites possess
increased fracture toughness and impact tolerance properties, higher chemical stability and unlimited self
life of raw materials, no volatile organic compounds so as to have a cleaner working environment with
reduced issues in material handling, reduced manufacturing costs with significant tooling cost savings,
increased opportunity for part integration as numerous components can be combined into one single
module which provides savings in tooling and assembly. Due to the above advantages, thermoplastic
composites are widely preferred in many strategic applications. The following methodologies have been
developed to study alternate failure modes in thermoplastic composite sandwich panels:
The linear and nonlinear relationship between the applied loading such as moment and stresses or
strains in the sandwich beams, based on the properties and dimensions of the components of the
beam has been carried out analytically to understand the behaviour of sandwich panels
A number of failure modes such as wrinkling of the compression skin, core failure and
indentation of the loaded skin has been analysed analytically
Constitutive modelling of the crushable foam such as Ultem foam has been incorporated in
ABAQUS and verified with experimental results
Basic mechanical properties of Ultem foam under uni-axial compression, tension, three-point
bending and shear have been carried out in laboratory tests
The computational models are carried out in Hypermesh and ABAQUS to validate the test results
The composite sandwich panels with TenCate skin and Ultem foam are tested and
PATRAN/ABAQUS has been used to generated three dimensional models to validate the
experiments.
Research VIII: Stochastic Compression Response of Defect Laminates Using Micro-mechanical
Models, funded under X-Plan Program, General Electric Energy Composite materials possess certain
inherent characteristics which give rise to waviness. During manufacturing processing of these materials,
waviness occurs as a result of residual thermal stresses from different thermal coefficient mismatch
between fiber and resin. Waviness occurrence in structures composed of composite materials has a
knockdown on load carrying capacity in compression. Hence the study of variability of waves and
wrinkles as a particular form of defect is very important to understand their behaviour. The following
methodologies have been developed:
23
Micromechanical representation of defect laminates with a resin block at the interior has been
undertaken in APDL script in ANSYS
Ramberg-Osgood representations of material curves from experiment have been carried out
Transfer function approach has been used to obtain compressive strengths for chosen values of
geometric parameters of defects
The assumed statistical distributions of defect parameters using Monte-Carlo simulation is
implemented in Crystal Ball software package
Research IX: Through thickness 8552 epoxy resin Infusion in T700S Carbon Tows: A process
modeling approach, funded under General Electric Aviation CEO Program The composites are used
in many weight related applications in aerospace structures. Due to the high performance requirement in
aircraft engine parts such as fan blade and fan case, the composites must confirm to varying
specifications. In order to manufacture defect free air worthy components like fan containment cases, the
manufacturing aspects are very important. Autoclave processing is widely used in manufacturing of
aerospace components. Most recently inline infusion has become a very cost effective approach in
meeting the challenging needs of aerospace industry. Hence understanding resin infusion process in
composite manufacturing is very vital for defect free parts. The following methodologies have been
developed:
Experiment on a rheometric RMS-800 parallel plate rheometer has been conducted to understand
the change of viscosity with respect to the change in temperature
The relationship between viscosity and temperature is given by Arrhenius type expressions
A modified Kozeny Carman equation is used to simulate the experimental observation
Fiber volume fraction as a function of Compaction pressure has been obtained through
experiments and validated using Cai & Gutowski model
Capillary pressure as a function of contact angle, diameter of filament, surface tension and type of
resin flow has been incorporated
The models have been incorporated in PAM-RTM software using constant and varying viscosity
models
A refined and novel variable permeability model has been presented to validate resin infusion
under varying pressure and temperature conditions
Research X: Passive Morphing for Fan Blades, funded under General Electric Aviation CEO
Program Composite fan blades are increasingly used due to various advantages associated with
composite materials. The following methodologies have been incorporated:
The centrifugal load is found to be directly proportional to the rpm of the blade. Both rpm
loadings under cruise and maximum climb have been taken in computation
Panel level idealization at the trailing edge has been made for giving maximum camber angle
with varying lay-ups
Optimization techniques are used to come up with ideal lay-up
A set of boundary conditions is assumed
24
Hybrid material concept has been adopted
Various shapes for leading edge, trailing edge, root and tip have been incorporated using APDL
scripts in ANSYS
Research XI: Stochastic Analysis of a Single Lap Joint Including Material and Geometric
Nonlinearity, General Electric Internal Funding for development of ideas for General Electric
Aviation Adhesive bonding is widely used in aircraft structures, primarily because it offers a low weight,
fatigue-resistant, and aerodynamically sound method of assembly. Adhesive bonding is also less labor
and cost-intensive when applied to large structures such as those commonly utilized in aircraft
manufacturing. The advantages associated with adhesive bonding include more uniform stress
distribution, assembly of materials of varying types and thicknesses, excellent strength to weight ratio,
lower production cost as compared to traditional assembly methods and excellent fatigue strength. Owing
to the distinct advantages offered, joints are inevitable in structural applications. Adhesives used in these
joints are usually polymeric materials, which exhibit non-linear material behaviour like elasto-plasticity
or visco-plasticity. The following computational methodologies have been developed:
A single element patch test has been performed in ANSYS and ABAQUS for probabilistic
analysis
In ABAQUS, a python script to run the required number of analyses using Monte Carlo
Simulations is implemented and ABAQUS CAE is used to run the script
An online cumulative probability calculator is used to calculate the probability of failure for each
value of load
An S-shaped curve has been obtained from both ANSYS and ABAQUS
Plasticity models of FM 73 resin have been incorporated in ABAQUS
Both two and three dimensional analyses have been carried out in ABAQUS for peel and shear
stress distributions
The loading versus probability of failure of S-shaped curve in a single lap joint has been obtained
using ABAQUS
Research XII: Thermal stress Analysis of Laminated Composite Plates General Electric Internal
Funding for Development of Ideas for General Electric Oil and Gas During the service conditions,
shell structures are subjected to thermo-mechanical loads. The following methodologies are undertaken:
A feasibility study has been undertaken to study the thermal response of laminated plates using
FORTRAN programming language
A novel plate bending element has been developed
Research XIII: High Performance Structures with Shape Memory Alloy Inserts General Electric
Internal Funding for Development of Ideas for General Electric oil and Gas Advanced structures
with enhanced performance and functionality often employ multiple materials including composites and
smart materials. The use of super-elastic inserts in the form of Shape Memory Alloy in joints and efficient
25
and reliable techniques to analyse joints in many engineering structures is vital to understand the
response. The following methodologies have been developed:
The material properties for the shape memory alloy have been incorporated using Liang and
Rogers Model
A new mixed interpolation of tensorial components (MITC) three dimensional degenerated shell
finite element plasticity model has been incorporated to validate the test results of shape memory
alloy
A single lap joint with shape memory alloy inserts has been analysed in ABAQUS
Research XIV: Stochastic Analysis of Composite Structures funded under General Electric Internal
Funding for General Electric Aviation Program While designers and manufacturers are opting for
composite materials in new applications, composites in many situations show fragility and susceptibility
to damage under conventional loads, both during initial processing and in service. Uneven temperature
and pressure distributions in the autoclave during manufacturing inevitably lead to imperfections in the
final laminate. Sometimes, minor impacts during initial assembly process can produce major damage on a
thin walled composite structure. Composites also perform poorly at high temperature and show reduced
failure strain at low temperatures. Inherent high variability in material properties and geometric values
arise due to heterogeneous make up of its constituent. Thus manufacturing techniques, loading,
environmental conditions, composite architecture and geometry etc all have an effect on the mechanical
behaviour. Any uncertainties in these conditions lead to uncertainties in the failure strength of composites.
The following methodologies have been incorporated:
A critical review has been undertaken to know the available computational techniques
The probability analysis is carried out in ANSYS for a simply supported laminated composite
plates with varying material properties and lamina orientations
Research XV: A computer aided FEM based numerical solution for transient response of laminated
composite plates with cutouts during Research Interaction with Ship Science, University of
Southampton, UK Cutouts are inevitable in many practical locations in the form of access ports for
electro-mechanical systems, damage inspection and altering the resonant frequency of the structures. The
following finite element methodologies have been developed:
A new assumed strain four node higher order plate bending element with three translations, two
rotations of the normals about the plate mid-plane, two warps of the normals and one drilling
rotational degree of freedom per node without shear correction factors has been developed
Consistent mass matrix is employed to evaluate the kinetic energy of the system
Newmark integration scheme is used to integrate the governing equations of motion
Numerical studies from the present computer aided finite element method based solution for
transient response of composite plates with cutouts are discussed
Research XVI: A study of thermal stresses in laminated composite plates during Research
Interaction with Ship Science, University of Southampton, UK Laminated composite plates are used
26
in many strategic applications under thermal conditions. The following computational methodologies
have been developed:
A new nine node iso-parametric plate bending element is developed based on a first order shear
deformation theory with shear correction factors from strain energy considerations
The new unified plate bending element contains three translations, two rotations of the normals
about the plate mid-plane
The mixed interpolation of tensorial components (MITC) technique is applied to get rid of
troublesome shear locking and parasitic spurious zero energy modes in the formulation
An empirical shear correction factor is applied to obtain the Classical Plate Theory (CPT) Results
from First order Shear Deformation Plate Theory (FSDT)
Transverse shear stress quantities are obtained by integrating the equilibrium equations
New results are presented on thermo-elastic response of laminated composite plates
Research XVII:A study of thermo-transient response of composite sandwich shells during Research
Interaction with Ship Science, University of Southampton, UK Composite sandwich shells are used in
many weight-related applications. One of the issues is to study the response of composite sandwich shells
under thermo-transient conditions. The following methodologies are developed:
A unified analytical first-order shear deformation shell theory is developed
A Navier-type solution along with the Newmark integration scheme is used to integrate the
governing equations of motion
An a-priori shear correction factor is employed to predict the dynamic response
An empirical shear correction factor is proposed for the shear deformation shell theory to obtain
the equivalent Classical Shell Theory
New results are presented on thermo-transient response of composite sandwich shells
Research XVIII:Analysis of damping response of composite sandwich folded plates during
Research Interaction with Ship Science, University of Southampton, UK Shell structures have a wide
range of engineering applications. Damping is a significant dynamic parameter which effects structural
fatigue and vibration amplitudes at elastic resonant frequencies and attenuates structure borne noise. The
following computational techniques have been developed:
A new four node iso-parametric flat facetted shell element with drilling rotational degrees of
freedom based on a first order shear deformation theory with shear correction factors has been
developed
The new shell element contains three translations, two rotations of the normals about the shell
mid-plane, and one drilling rotational degree of freedom per node
A consistent mass matrix formulation is employed to evaluate the total kinetic energy of the
system
Analytical solutions based on first order shear deformation theory and classical theory are
implemented
New results are presented for the damping analysis of composite folded plate structures
27
Research XIX: Stress analysis of thermoplastic composite sandwich plates during Research
Interaction with Ship Science, University of Southampton, UK Thermoplastic composite materials are
used in many challenging applications due to their improved properties in stiffness, strength, weight,
corrosion resistance, thermal properties, fatigue life and wear resistance. During their service conditions,
thermoplastic composite sandwich structures are subjected to varying loads. Hence the effects on
mechanical loads on the response of thermoplastic composite structures have been important to
understand their behaviour. The following methodologies are developed:
A nine node iso-parametric plate bending element is developed based on a refined higher order
theory without the use of shear correction factors
The new refined third order plate bending element contains three translations, two rotations and
two warpings of the normals about the plate mid-plane
The Mixed interpolation of tensorial components (MITC) technique is applied to get rid of
troublesome shear locking and parasitic spurious zero energy modes
Analytical formulations based on a refined third order theory are implemented
Transverse shear stress quantities are obtained by integrating the equilibrium equations
New results on thermoplastic sandwich panels are presented
Research XX: A Study of transient response of initially stressed composite sandwich folded plates
during Research Interaction with Ship Science, University of Southampton, UK With the advent of
fiber-reinforced laminated composites, the applicability of shell structures has increased many folds due
to their low weight, high stiffness and high strength properties. During their build and fabrication,
sandwich structures are subjected to various edge loads which can lead quickly to failure. Hence the
effects of initial stresses on the dynamic response of composite sandwich shells are very important to
understand their behaviour. The following finite element techniques are developed:
A new four node flat facetted shell element with drilling rotational degrees of freedom based on a
first order shear deformation theory with shear correction factors has been developed
A consistent mass matrix formulation is employed to evaluate the total kinetic energy of the
system
The Mixed interpolation of Tensorial Components (MITC) scheme is used to get rid of shear
locking and spurious zero energy modes in the formulation
New results are presented for the transient analysis of initially stressed composite sandwich
folded plate structures
Research and Consultancy Projects XXI in VSSUT, Burla: A project proposal was submitted to DST,
New Delhi in 2012 to understand the stochastic behaviour of composite structures which find applications
in various land based structures. Also as a part of Civil Engineering Team at VSSUT, Burla, the project
proposal on Advanced Civil Engineering Design using CAD and CAM has been submitted DST, Odisha
in December 2011. Most recently Department of Civil Engineering was granted a sum of rupees twelve
lakhs and fifty thousand to develop Civil Engineering Technology Lab based on above proposals for
28
CAD and CAM. I carried out Consultancy projects on Design of Overhead Tank, Ground Reservoir and
Treatment Plant at Sambalpur funded by Executive Engineer Sambalpur Division in 2013. I have proof
checked the designs regarding Preperation of DPR for rural piped water supply project to khaliapani and
adjoining villages of Nuapada district in 2014. I am a member of PMGSY and STA on water supply
projects in VSSUT, Burla. I have given Consultancy services to other technical consultants on design of
over head tanks with staging and underground reservoirs on water supply projects.
Ph.D. Research: On Dynamic Analysis of Laminated Composite and Sandwich Plates Using Finite
Element Method.
Now-a-days design is becoming performance oriented. Indeed, the tendency is to produce lighter, stronger
and more economically efficient structures without altering their structural integrity. During their
operating life, structures are subjected to various levels of vibration due to the natural environment in
which they are operating. Consequently dynamic analysis as well as static analysis need to be carried out
at the design stage in order to accurately optimize the design of structural members, to avoid resonance
and fatigue damage and to minimize damage of sensitive equipment and improve comfort of the
occupants of the structure. The objective of this research was to study the behaviour of plate structures
under dynamic loading environment using newly developed plate bending elements. A brief review of the
current finite elements for dynamic analyses of plate structures was given. Two new multi-layered plate
bending elements (DKT/CST and DKT/LST) were developed, based on a combination of the three noded
Discrete Kirchhoff theory (DKT) triangular plate bending element, the three noded constant strain triangle
(CST) and the six noded linear strain triangle (LST). Both frequency independent and frequency
dependent damping of viscoelastic materials were considered. An iterative complex eigensolver was used
to compute the natural frequencies and loss factors. Several benchmark problems were solved using these
new multi-layer plate elements. As the plate bending elements previously developed on the basis of
Kirchhoff's theory are inadequate for thick plate analysis, several quadrilateral Mindlin plate bending
elements (four and nine node Lagrange elements, eight node serendipity element, nine node Heterosis
element and four and nine node assumed strain elements) were developed to study the behaviour of
Mindlin plates. The plate bending elements based on Mindlin theory require either constant or variable
shear correction factors in their formulations. Hence two new Co four and nine node assumed strain finite
element formulations of a refined third order theory which did not require shear correction factors, were
developed and used to analyse isotropic, orthotropic, and layered anisotropic composite and sandwich
plates under free vibration, damping and transient loading conditions. Parametric effects of plate aspect
ratio, length to thickness ratio, degree of orthotropy, number of layers and lamination scheme on the
natural frequencies (free vibration), loss factors (damping) and dynamic (transient) responses were
investigated. The results presented in this investigation have been useful in better understanding the
behaviour of sandwich laminates under dynamic conditions and are potentially beneficial for designers of
sandwich structures.
29
M.E. Research: Nonlinear Finite Element Analysis of Visco-Plastic Axi-Symmetric Lap Joints.
Adhesive bonded joints are usually preferred in composite structures due to their intrinsic advantages of
having minimal sources of stress concentrations, efficient load transfer over a large bonding area, superior
fatigue resistance and high strength-weight ratio compared to the conventional joints. In the present work
adhesive bonded axi-symmetric joints were analyzed using the finite element method, considering the
adhesive as elasto-viscoplastic material. A finite element formulation was adopted, considering material
nonlinearity for the adhesive and geometric nonlinearity for both adhesive and the adherend. The
formulation developed was thoroughly tested with some standard benchmark problems. The viscoplastic
approach was used to study time dependent phenomena. The same algorithm was also adopted to
investigate the elasto-plastic stress distribution in the joint under steady state conditions.
B.E. Research: Behaviour of Reinforced Concrete Beams Under Shear and Computer Aided Analysis of
Plane Frames
The beams are designed to test as to fail by shear only in the Laboratory. The failure pattern has been
found to conform to shear compression failure. The cube strength and the corresponding cylinder strength
obtained from tests is found to exceed the characteristic compressive strength of concrete of the
respective grade by a comfortable margin. This implies quality has been achieved in casting process. The
yield stress of HYSD bars tested has been found to be 580.5 MPa which is well above the nominal value
of 415 MPa. It is found that the ultimate moment of resistance of beams obtained from the test results
exceeds the nominal moment of resistance obtained by using the concrete grade M15 and steel grade
Fe415 but falls short of the actual moment of resistance obtained by putting values of fck and fst obtained
from material tests both by IS and BS code prescribed methods. It is understood that the moment of
resistance prescribed by the codes is for the case of failure by bending. However, before the beams could
reach that value of the moment or resistance, they failed under shear, a worse criterion. In other words, if
the beams had been restrained against failure by shear, they would have definitely exceeded the
theoretical moment of resistance. We can find the the moments of resistance of beams obtained from test
results exceed the moments corresponding to shear strength of beams as given by the Indian and British
Codes. The Codes however, give moment value or for that matter, the shear strength corresponding to the
appearance of first crack in the beam. It is found that the moments of resistance of the beams
corresponding to the appearance of first crack are found to exceed the theoretically specified values. The
average of the ratio of the tested resistance value to the value obtained following IS Code method is
obtained as 1.72. Thanks to Computer Aided Structural Analysis, the analysis of a 30 storeyed building is
done based on analysis of plane frames by stiffness method. The results are exactly matched with
previously published results from the literature.
30
PhD Research I Guidance Ongoing: A review on the performance of Modified Cam Clay Model for
Fine Grained Soil
The Modified Cam Clay (MCC) is one of the most widely used soil models. It was developed by the
researchers at Cambridge University, UK. The MCC model works very well for predicting the behaviour
of normally consolidated clays, but it can not predict many important features of the behaviour of over
consolidated clays. The original cam clay model was first introduced by Roscoe and Schofield. But this
model was found some deficient in some aspects namely yield surface and the predicted value of Ko
(coefficient earth pressure at rest). Later on MCC model was developed by Roscoe and Burland to solve
theses problems. The MCC is an elastic-plastic strain hardening model and is based on the critical state
theory. The MCC model is used to predict the behaviour of locally available clayey soil and validated
with the experimental results. A series of Triaxial tests (drained and undrained conditions) and
Consolidation tests have been conducted on two samples. A comparison is made between the predictions
given by MCC model with experimental data of different soil samples. From the above comparison it is
observed that the model predicted results match well with experimental values under drained condition
for all the samples tested, but in undrained condition substantive deviations are observed.
The remaining part will be further development of modified cam clay model and its computer code using
critical state soil mechanics, validating the code by using commercial software like PLAXIS, evaluating
the soil parameters/behaviour by conducting a set of experiments using local fine grained soil.
PhD Research II Guidance Ongoing: Stochastic free vibration analysis of composite sandwich plates
In this topic, stochastic analysis of composite sandwich plates has been carried out using a nine node
Heterosis plate bending element. The plate bending element contains one transverse displacement and two
rotations of the normals about the plate’s mid-plane. Selective reduced integration scheme is adopted to
integrate terms associated with the stiffness matrix formulations. Both lumped and consistent mass
matrices are considered in the analysis. The accuracy and reliability of the present finite element
formulation is verified with previously published results in the literature. New results are presented to
examine the effects of boundary conditions and plate geometries.
The remaining part will be further development of finite element based stochastic models to study the
static and dynamic response of composite laminated and sandwich plates under geometric and material
uncertainties.
M.Tech. Research Guided Topic I: Optimization of laminated panels using closed form solution and the
finite element method
The objective of this thesis is to study the behaviour of laminated beam/plate structures using
static/dynamic loading environment using developed closed form solutions based on third order theory
and plate bending elements based on classical laminated plate theory. A brief review of the current closed
31
form solutions and finite elements for static/dynamic analyses of beam/plate aspect ratio and length to
thickness ratio on the natural frequencies (free vibration) and buckling loads have been shown. The
results presented in this investigation could be useful in better understanding the behaviour of laminated
beam/plate structures under static/dynamic conditions and potentially beneficial for designers of
laminated beam/plate structures.
M.Tech. Research Guided Topic II: Transient analysis of panels using the finite element method
The objective of this thesis is to study the behaviour of beam structures under dynamic loading
environment using developed beam bending elements. A brief review of the current finite elements for
dynamic analyses of beam structures is given. Parametric effects of beam aspect ratio and length to
thickness ratio on the natural frequencies (forced vibration) dynamic (transient) responses have been
shown. The results presented in this investigation could be useful in better understanding the behaviour of
beam structures under dynamic conditions and potentially beneficial for designers of beam structures.
M.Tech. Research Guided Topic III: Stochastic analysis of laminated panels using closed form solution
and the finite element method
The objective of this thesis is to study the behaviour of laminated beam/plate structures under
static/dynamic loading environment using developed closed form solution based on classical laminated
plate theory and Kirchhoff plate bending element. A brief review of the current closed form solutions and
finite elements for static/dynamic analysis of beam/plate structures is given. Parametric effects of
beam/plate aspect ratio and length to thickness ratio on the natural frequencies have been shown. The
results presented in this investigation could be useful in better understanding the behaviour of laminated
beam/plate structures under static/dynamic conditions and potentially beneficial for designers of
laminated beam/plate structures.
M.Tech. Research Guided Topic IV: Transient response of plate panels using closed form solution and
the finite element method
The objective of this thesis is to study the static/dynamic behaviour of laminated plate structures under
varying loading environment using developed closed form solution based on classical laminated plate
theory and Discrete Kirchhoff triangular plate bending element. A brief review of the current closed form
solutions and finite elements for static/dynamic analysis of plate structures is given. Parametric effects of
plate aspect ratio and length to thickness ratio have been shown. The results presented in this
investigation could be useful in better understanding the dynamic behaviour of laminated plate structures
under time dependent loading conditions and potentially beneficial for designers of laminated composite
and sandwich plate structures.
32
M.Tech. Research Guided Topic V: Free vibration analysis of panels using closed form solution and
the finite strip method
The objective of this thesis is to study the dynamic behaviour of isotropic plate structures under free
vibration condition using developed closed form solution based on first order shear deformation shell
theory and cubic finite strip element. A brief review of the current closed form solutions and finite strips
for dynamic analyses of plate structures is given. Parametric effects of plate aspect ratio and length to
thickness ratio have been shown. The results presented in this investigation could be useful in better
understanding the dynamic behaviour of plate structures under free vibration conditions and potentially
beneficial for designers of plate structures.
M.Tech. Research Guided Topic VI: Dynamic response of panels using three dimensional finite
element method
The objective of this thesis is to study the static/dynamic behaviour of beam/solid structures under
varying loading environment using developed beam bending and three dimensional finite elements. A
brief review of the current finite elements for static/dynamic analyses of beam and solid structures is
given. Parametric effects of beam/solid aspect ratio and length to thickness ratio on the natural
frequencies (free vibration) and dynamic (transient) responses have been shown. The results presented in
this investigation could be useful in better understanding the behaviour of beam/solid structures under
time dependent loading conditions and potentially beneficial for designers of beam/solid structures.
MTech. Research Guided Topic VII: Dynamic analysis of unsymmetrically laminated plates using the
finite element method
The objective of this thesis is to study the static/dynamic behaviour of un-symmetrically laminated
beam/plate structures under varying loading environment using developed nine node and eight node plate
bending elements. A brief review of the current finite elements for static/dynamic analyses of beam/plate
structures is given. Parametric effects of beam/plate aspect ratio and length to thickness ratio have been
shown. The results presented in this investigation could be useful in better understanding the dynamic
behaviour of un-symmetrically laminated beam/plate structures under time dependent loading conditions
and potentially beneficial for designers of laminated beam/plate structures.
MTech Research Guided Topic VIII. Free vibration and buckling analysis of composite sandwich
plates using finite strip and finite element procedures
The objective of this thesis is to study the free vibration and buckling behaviour of composite sandwich
plates using finite strip and finite element procedures. A brief review of finite strip and finite element
techniques for free vibration and bucking analyses is given. A range of problems has been solved to
illustrate the approach. The results presented in this investigation could be useful in better understanding
33
the free vibration and buckling behaviour of laminated composite and sandwich plates and potentially
beneficial for designers of strategic structures.
B.Tech. Research Guided Topic I: Stochastic analysis of a single lap joint including geometrical and
material nonlinearity
The stochastic analysis of a single lap joint has been carried out with geometric and material nonlinearity.
A parametric study of the two dimensional finite element model of the single lap joint has also been
undertaken by varying the lap thickness and the lap overlap length. The findings could help in
understanding the stochastic behaviour of lap joints which find applications in aerospace industries.
B.Tech. Research Guided Topic II: Dynamic analysis of beams using the finite element method
The objective of this thesis is to study the behaviour of beam structures under dynamic loading
environment using developed beam bending elements. A brief review of the current finite elements for
dynamic analyses of beam structures is given. Parametric effects of beam aspect ratio and length to
thickness ratio on the natural frequencies (free vibration) buckling loads and dynamic (transient)
responses have been shown. The results presented in this investigation could be useful in better
understanding the behaviour of beam structures under dynamic conditions and potentially beneficial for
designers of beam structures.
B.Tech. Research Guided Topic III: Free vibration analysis of plates and plane frames using the finite
element method
The objective of this thesis is to study the behaviour of plate and plane frame structures under dynamic
loading environment using Mindlin plate bending and frame elements. A brief review of the current finite
elements for dynamic analyses of plate structures is given. As the plate bending elements developed on
the basis of Kirchhoff’s theory are inadequate for thick plate analysis, several quadrilateral Mindlin plate
bending elements are developed to study the behaviour of Mindlin plates. The results on plates with
varying boundary conditions, material properties and loading conditions are presented to illustrate the
usefulness of the proposed approach. The findings from the present study could be useful in many
practical situations.
B.Tech. Research Guided Topic IV: Analysis of plane frames and plates under dynamic loading
conditions using the finite element method
The objective of this thesis is to study the static/dynamic behaviour of plane frame and plate structures
under varying loading environment using the finite element method. A brief review of the current finite
elements for dynamic analyses of plane frames and plate structures is given. Parametric effects of length
to thickness ratio have been shown. The results presented in this investigation could be useful in better
34
understanding the dynamic behaviour of plane frames and plate structures under time dependent loading
conditions and potentially beneficial for designers of plane frames and plate structures.
B.Tech. Research Guided Topic V: Plasticity Analysis of Beams and Plane Frames Using the Finite
Element Method
The objective of this thesis is to study the plasticity behaviour of beams and plane frames under varying
loading environment and boundary conditions using developed plane frame elements. A brief review of
the current finite elements for plasticity analysis of beams and plane frames is given. Parametric effects of
beam and frame aspect ratio and length to thickness ratio have been shown. The results presented in this
investigation could be useful in better understanding the behaviour of beams and plane frames under
varying loading environments and boundary conditions for designers of the beam and frame structures.
B.Tech. Research Guided Topic VI: Static Analysis of Plane Elasticity Problems Using The Boundary
Element,. Element Free Galerkin and The Finite Element Method
The objective of this thesis is to study the elastic behaviour of plane elasticity problems using BEM, EFG
and FEM Techniques. A brief review of BEM, EFG and FEM Techniques for the elasticity analyses is
given. A range of problems has been solved to illustrate the approach. The results presented in this
investigation could be useful in better understanding the elastic behaviour of plane stress, plane strain and
axi-symmetric problems and potentially beneficial for designers of strategic structures.
Ajaya Kumar Nayak
35
Statement of Teaching
My teaching interests are in the areas of mechanics, materials and structures. My teaching has focussed on
the following areas:
Mechanics, Finite element analysis, Numerical methods, Structural Integrity, Structures and materials,
Theory of plate structures, Structural analysis, Failure of materials, Materials and structural
engineering, Marine safety and environmental engineering.
I enjoy teaching of various courses with utmost interest and participate in the development of curriculum.
My goal of teaching is to explain the principles of mechanics, materials and structures in a simple and
well understood manner through examples.
Teaching 2006-Present The aims of the teaching have been to understand the principles of mechanics,
materials and structures.
Teaching I. Structural Integrity (Ship Science, School of Engineering Sciences, University of
Southampton,UK) Structural Integrity is a graduate course in Msc maritime Engineering. Fracture
mechanics approach which is a part of Structural Integrity course covers introduction to failure criteria
(yield criteria in steel without crack, brittle fracture of steel specimens, high cycle fatigue), Linear elastic
fracture mechanics approach (the Griffith criterion for elastic energy release rate, stresses at the crack tip),
Nonlinear elastic fracture mechanics approach and Case studies.
Teaching II. Marine Safety and Environmental Engineering (Ship Science, School of Engineering
Sciences, University of Southampton, UK) Marine safety and environmental engineering is a graduate
course in maritime engineering. Reliability and Risk based design course which is a part of Marine safety
and environmental engineering course covers reliablity (assessment of reliability, failure data collection,
confidence limits, characteristic values, statistical methods), Structural reliability (reliability methods
incorporating Level 1, 2 and 3, Monte-Carlo simulation, Hasoferlind, case studies, partial safety factors
and design code formats) and Risk based design (risk identification, risk estimation, risk evaluation, risk
index number, implied cost of averting a fatality, as low as reasonably practicable).
Teaching III. Finite Element Analysis and Optimization (General Electric Global Research,
Bangalore, India) Finite element analysis and optimization is a Master of Engineering course in Edison
Engineering Degree Program (EEDP) in General Electric. It covers engineering design problem, review
of elasticity equations, finite element analysis steps, development of methodologies for bar element,
principle of minimum potential energy, beam elements, two dimensional elements (plane stress, plane
strain), criteria for convergence, structural dynamics, Nonlinear problems (Geometric nonlinearity for
large deflections and large rotations, Material nonlinearity for plasticity, nonlinear elasticity, Contact
nonlinearity), Solution methods, Computer aided design (CAD), Analysis of results, advanced material
36
models, Example case studies, Optimization basics, variational problem, multi-criteria optimization,
gradient based optimization methods, Genetic algorithms.
Teaching IV. Mechanical Behavior of Materials (General Electric Global Research, Bangalore,
India) Mechanical behaviour of materials is a Master of Engineering course in Edison Engineering
Degree Program (EEDP) in General Electric. It covers introduction to materials
(application,design,material,cost,process,types of design,goals for evaluating mechanical behavior of
materials), principles of mechanics(concepts of stress and strain), material behavior (spectrum of
engineering materials), linear elasticity, plasticity, fracture mechanics, creep, visco-elasticity.
Teaching V. Advanced Reinforced Concrete Design (VSSUT, Burla India) Advanced reinforced
concrete design is a Master of Technology course in Structural Engineering (Civil Engineering) in
VSSUT, Burla. It covers design of reinforced concrete structures: methods of design, WSD and LSD,
review in brief of LSD-flexure, axial flexure, shear and tension, estimation of crack width, estimation of
deflection of reinforced concrete beams, analysis and design of building frames subjected to wind load,
earthquake and structural response, ductility of reinforced structures, material ductility-steel and concrete,
section ductility, member ductility, structural ductility, ductile detailing of r.c frames for seismic forces,
design of deep beams and design of concrete shear walls.
Teaching VI. Advanced Design of Steel Structures (VSSUT, Burla India) Advanced design of steel
structures is a Master of Technology course in Structural Engineering (Civil Engineering) in VSSUT,
Burla. It covers limit states design of steel members, uncertainties in load and resistance, limit states and
load and resistance factor design methods, stability criteria: stability of beams – local buckling of
compression flange & web, lateral-torsional buckling, stability of columns -slenderness ratio of columns,
local buckling of flanges and web, bracing of column about weak axis, method of design - allowable
stress design, plastic design, load and resistance factor design; strength criteria: beams –flexure, shear,
torsion, columns – moment magnification factor, effective length, P-M interaction, Bi-axial bending, joint
panel zones, Drift criteria: P-Ä effect, deformation-based design; connections: types – welded, bolted,
location – beam column, column-foundation, splices.
Teaching VII. Theory of Elasticity and Plasticity (VSSUT, Burla India) Theory of Elasticity and
Plasticity is a Master of Technology course in Structural and Geotechnical Engineering Streams (Civil
Engineering) in VSSUT, Burla. It covers linear elasticity; stress, strain, constitutive relations, strain
displacement relations, equilibrium and compatibility equations, stress and displacement functions, two
dimensional problems in cartesian and polar coordinates, description of an elasticity problem as a
boundary value problem, bending of beams- cantilever and simply supported beam, stress distribution for
axi-symmetric problems, pure bending of curved bars, effect of circular holes on stress distribution in
plates, stress and strain in three dimensions; principal stresses, maximum shearing stress, principal axes of
strain, stretching of prismatic bar by its own axis, elementary problems of elasticity in three dimension,
torsion of non-circular prismatic bars, Saint Venant’s theory, section ductility, various analogies, torsion
of hollow and thin section, application of energy methods, introduction to the theory of plasticity, the
37
yield criteria of metals, stress space representation of yield criteria, stress-strain relations plastic potential,
flow rules and maximum work hypothesis, two dimensional plastic flow problems, Incompressible two
dimensional flow, stresses in plastic materials in condition of plane strain, equation of equilibrium the
simplest slip-line fields.
Teaching VIII. Earthquake Analysis and Design (VSSUT, Burla India) Earthquake Analysis and
Design is a Master of Technology course in Structural and Geotechnical Engineering Streams (Civil
Engineering) in VSSUT, Burla. It covers characteristics of earthquakes; earthquake response of
structures, seismology, seismic risk and hazard, soil dynamics and seismic inputs to structures,
characterization of ground motion; lateral load calculation, base shear, earthquake intensity and
magnitude; recording instruments and base line correction, predominant period and amplification through
soil, response spectrum, analysis, spectral analysis, idealization of structural systems for low, medium and
high rise buildings, nonlinear and push over analysis, dynamic soil-structure interaction, earthquake
design philosophy, concept of earthquake resistant design; code provisions of design of buildings,
reinforcement detailing for members and joints, retrofitting and strengthening of structures, concept of
base isolation design and structural control.
Teaching IX. Advanced Structural Design (VSSUT, Burla India) Advanced Structural Design is a
Bachelor of Technology course in Civil Engineering in VSSUT, Burla. It covers building portals,
analysis of portal frames and design of rectangular portal frames.
Teaching X. Structural Design (VSSUT, Burla India) Structural Design is a Bachelor of Technology
course in Civil Engineering in VSSUT, Burla. It covers properties of concrete and reinforcing steel,
philosophy, concept and methods of reinforced concrete design, introduction to limit state method: limit
state of collapse and limit state of serviceability, application of limit state method to rectangular beams
for flexure, shear, bond and torsion. design of doubly reinforced beams, design of T-and L-beams, design
of one way and two way slabs, design of staircases, design of short and long columns with axial and
eccentric loading, design of isolated column footing, design principle of masonry structures: brick and
stone masonry, design of masonry short and long walls, design of columns and retaining walls.
Teaching XI. Steel Structures (VSSUT, Burla India) Steel Structures is a Bachelor of Technology
course in Civil Engineering in VSSUT, Burla. It covers philosophy, concept and methods of design of
steel structures, structural elements, structural steel sections, rivetted and welded connections, design of
tension members, design of compression members, design of columns, lacing and battening, Column
base and foundation. design of beams, plate girder and gantry girder and design of roof trusses.
Teaching XII. Structural Dynamics and Earthquake Engineering (VSSUT, Burla India) Structural
Dynamics and Earthquake Engineering is a Bachelor of Technology course in Civil Engineering in
VSSUT, Burla. It covers normal mode vibration of continuous beams, vibrating strings, longitudinal
vibration of rods, torsional vibration of rods, Euler equation of beams, effect of rotary inertia and shear
38
deformation, analysis of structural response to earthquake, seismological background and deterministic
analysis of earthquakes.
Teaching XIII. Structural Analysis II (VSSUT, Burla India) ) Structural Analysis II is a Bachelor of
Technology course in Civil Engineering in VSSUT, Burla. It covers introduction to force methods of
structural analysis, introduction to displacement methods of structural analysis, analysis of continuous
beam and plane frame by slope deflection method, analysis of continuous beam and plane frame by
moment distribution method, analysis of continuous beam and simple portals by Kani’s method, analysis
of two pinned and fixed arches with dead and live loads, suspension cable with two pinned stiffening
girders, plastic analysis: plastic modulus, shape factor, plastic moment of resistance, load factor, plastic
analysis of continuous beam and simple rectangular portals, application of upper and lower bound
theorems, matrix method of analysis, flexibility and stiffness method, application to simple trusses and
beam.
Teaching XIV. Civil Engineering Materials for Construction (VSSUT, Burla India) Civil
Engineering Materials for Construction is a Bachelor of Technology course in Civil Engineering in
VSSUT, Burla. It covers bricks: methods of bricks manufacture, testing of bricks, cement, classification,
chemical composition, hydration, tests for cement, concrete: composition, water- cement ratio,
workability, masonry arches: terms used types of arches, stability, line of thrust, depth of arch at the
crown, cavity walls: purpose, method of construction, stairs: terms used, types of stairs, essential
requirements, wooden stairs, concrete stairs, metal stairs, fire resistive construction: fire resistive
construction, fire resistance of common building materials, protection for girders and columns, fire
fighting appliances, plastering: materials for plastering, methods of plastering, defects in plastering and
remedy. damp prevention: causes, effects, different methods of prevention of dampness, types of doors
and windows, painting and decoration: oil painting and varnishing, enamel painting, washes and
distemper, defects in painting, glazing: varieties of glass, decorative glass, door and window glazing,
repair of building: annual and special repair of buildings, maintenance of buildings, types of cracks in
building, types of building joint, stone: Indian building stones, their properties and uses, methods of
querying, timer: preservation and seasoning of timber, foundation: brief idea on various types of
foundation.
Teaching XV. Concrete Structures II (VSSUT, Burla India) Concrete Structures II is a Bachelor of
Technology course in Civil Engineering in VSSUT, Burla. It covers introduction to earthquake
engineering; cyclic behavior of concrete and reinforcement, significance of ductility, ductility of beam,
design and detailing for ductility, simple problems based on above concept, computation of earthquake
forces on building frame using seismic coefficient method as per IS 1893-2002, combined footing:
design of rectangular and trapezoidal footing, design of raft foundation, retaining walls: forces acting on
retaining wall, stability requirement, design of cantilever and counterfort retaining walls, building portals:
analysis of portal frames, design of rectangular portal frames, design of water tanks: design requirements,
design of tanks on ground and underground.
39
Teaching XVI. Theory of Elasticity and Plasticity (VSSUT, Burla India) Theory of Elasticity and
Plasticity is a Bachelor of Technology course in Civil Engineering in VSSUT, Burla. It covers plane
stress and plane strain problems. general stress and strain equations (equilibrium and compatibility
equations). two dimensional problems in rectangular coordinates. stress and strain components,
differential equation, equilibrium equations and compatibility equations in polar coordinate. stress
distribution for axisymmetric problems. pure bending of curved bars, thick walled cylinder. concentrated
force at a point of straight boundary. force acting on the end of a wedge. concentrated force acting on a
beam. effect of circular holes on stress distributions in plates. stress and strain in three dimensions:
principles stresses, maximum shearing stress, principal axes of strain. stretching of prismatical bar by its
own axis. elementary problems of elasticity in three dimension. torsion of non-circular prismatic bars.
Saint Venant’s theory. various analogies. torsion of hollow and thin section. application of energy
methods. introduction to the theory of plasticity., the yield criteria of metals, stress space representation of
yield criteria. stress-strain relations plastic potential, flow rules and maximum work hypothesis. two
dimensional plastic flow problems. incompressible two dimensional flow, stresses in plastic materials in
condition of plane strain, equation of equilibrium the simplest slip-line fields.
Teaching XVII. Structural Analysis (VSSUT, Burla) Structural Analysis is a Bachelor of Architecture
Course in Architecture in VSSUT, Burla. It covers Introduction to statically determinate/ indeterminate
structure with reference to 2D and 3D structures. Free body diagram of structure. Introduction to
kinematically determinate/indeterminate structures with reference to 2D and 3D structures. Degree of
freedom. B.M. and S.F. diagrams for different loading on simply supported beam, cantilever and
overhanging beams. B.M. shear and normal thrust of three hinged arches. Deflection of statically
determinate beams: Integration method, Moment area method, Conjugate beam method. Deflection of
statically determinate beams by energy methods- strain energy method, castiglianos theorems, reciprocal
theorem, unit load method. Deflection of pin-jointed trusses, Williot-Mohr diagram. B.M. and S.F.
diagrams for statically indeterminate beams – propped cantilever and fixed beams. Application of three
moment theorem to continuous and other indeterminate beams. ILD for determinate structures for
reactions at supports, S.F. at given section, B.M. at a given section, Maximum shear and maximum
bending moment at given section, Problems relating to series of wheel loads, UDL less than or greater
than the span of the beam, Absolute Maximum bending moment. ILD for B.M., S.F., normal thrust and
radial shear of a three hinged arch. Suspension cables, three hinged stiffening girders. Introduction to
space frames.
Teaching XVIII. Engineering Mechanics (VSSUT, Burla) Engineering Mechanics is a Bachelor of
Architecture Course in Architecture in VSSUT, Burla. It covers Rectilinear Translation: kinematics,
principles of dynamics, D’Alemberts principle, momentum and impulse, work and energy, impact,
Curvilinear translation, kinematics, equation of motion, projectile, D’Alemberts principle of curvilinear
motion.
Teaching XIX. Building Construction-I (VSSUT, Burla) Building Construction-I is a Bachelor of
Architecture Course in Architecture in VSSUT, Burla. It covers foundation – functions of foundations,
types of foundations, simple load bearing foundations in brick and stone; concrete blocks – hollow and
solid, stabilised mud blocks; timber work- simple carpentry joineries, different types of doors and
windows, fixing details of frame, style, rail, panel, glazing including fixtures and fastenings.
40
Teaching XX. Building Materials-II (VSSUT, Burla) Building Materials II is a Bachelor of
Architecture Course in Architecture in VSSUT, Burla. It covers varnishes, paints, distempers-
characteristics and process of varnishing, type and compositions of paints, types of painting system:
aluminium paints, cement-based paints, oil emulsion paints, enamel paints, their selection criteria; plastics
and polymers - types and use of plastic in building construction, properties of plastic; use of various
polymer materials in building industry, use of nano-paints; miscellaneous materials - glass, fibre glass,
cork, rubber, gypsum, sealants, asbestos, heat and sound insulating materials, their trade name and uses.
Innovations in Teaching:
In VSSUT, Burla I have evaluated students internally through adequate number of tests, quiz, home
assignments, viva and grand viva-voce. I have achieved 100 % pass results for both BTech and MTech
taught courses. I have developed course materials on MTech Structures Courses on Advanced Design of
Steel Structures, Structural Optimization and Theory of Elastic Stability for 2011-2012. I also developed a
New MTech Program on Industrial Safety Technology, for 2014-2015 with an eye on focussing safety
issues in public and private sector organisations. I also developed Optimisation syllabus for MTech
Program in Geotechnical Engineering. I have actively participated in the development of NBA documents
and I have developed MTech dual degree syllabus for structural engineering.
Taking into account Innovations in Teaching, I have prepared the lectures with care. Each lecture is
focussed on a theme and possible practical application areas. Delivery of lectures is more interactive for
better understanding of the concepts. Case studies are discussed to show the applicability of their
knowhow for live problems,
In the context of Innovations in Laboratory experiments, the experimental set up was thoroughly
examined before carrying out any experiment, Similar results from other sources are also studied. The
prototype problems are discussed vis-a-vis model studies. Interactive sessions are scheduled for better
understanding of the problem.
In Innovations in evaluation methods, answer sheets of question papers are prepared. Each answer sheet is
thoroughly checked. Students are shown answer sheets before publication of the results. The students
were explained about their performance and possible improvements.
In the context of Preparation of teaching materials, Text books, laboratory manuals etc. teaching materials
are prepared well in advance and Power-Point slides are presented to students on practical application
areas. Class notes are prepared carefully to meet the requirements.
Regarding Professional Organization of Teachers, I have taught to teachers of various institutions during
summer school on AICTE approved short term course on Design of steel structures using IS800:2007
from 18 June to 1 july 2012 on Design of Beams in VSSUT Burla.
I got my teaching and curricular programme evaluated by students which is very important for
innovations in my teaching methods.
41
Course Evaluation on Grade Points of 5 (2011-2012) at VSSUT, Burla
Courses
(1)
Organization
(2)
Communication
(3)
Interaction
(4)
Satisfaction
on grades
(5)
Intellectual
Stimulation
(6)
Average
(cols 2 +
6)/5
SDEE (UG) 5 4.2 4.5 4.8 4.2 4.5
ARCD (PG) 4.8 4.8 5 4.8 4.6 4.8
Course Evaluation on Grade Points of 5 (2012-2013) at VSSUT, Burla
Courses
(1)
Organization
(2)
Communication
(3)
Interaction
(4)
Satisfaction
on grades
(5)
Intellectual
Stimulation
(6)
Average
(cols 2 +
6)/5
SD & SS
(UG)
5 4.2 4.5 4.8 4.2 4.5
ARCD &
ADSS (PG)
4.8 4.8 5 4.8 4.6 4.8
Course Evaluation on Grade Points of 5 (2014-2015) at VSSUT, Burla
Particulars SS
(UG)
CSII
(UG)
TEP
(PG)
Preparedness for the class 4.67 4.67 4.78
Organisation of the content 4.54 4.44 4.57
Clarity of delivery 4.07 4.22 4.57
Quality of board work 4.39 4.42 4.86
Student participation 4.04 4.02 4.43
Coverage of the syllabus 4.48 4.48 4.93
Input beyond text book 4.07 4.00 4.36
Quality of tutorial/home assignment 3.81 3.89 4.64
Punctuality in taking class 4.70 4.72 4.93
Availability for consultation 4.63 4.70 4.93
Average (rows 2 + 11)/10 4.34 4.36 4.70
Ajaya Kumar Nayak
42
New MTech Program on Industrial Safety Technology
I have developed syllabus for a New MTech in Industrial Safety Technology, Department of Civil Engineering,
VSSUT, Burla which has been passed in Board of Studies and Academic Council in 2013-2014 as below.
Sl No. Subject L-T-P Credits
I SEMESTER
1 Probability and Statistics 4-0-0 4
2 Safety Management 4-0-0 4
3 Occupational Health and Hygiene 4-0-0 4
4 Elective-I (Group A) 4-0-0 4
5 Elective-II (Group A) 4-0-0 4
6 Industrial Safety Technology Laboratory 0-0-4 4
7 Seminar – I 0-0-3 2
8 Comprehensive Viva Voce-I 2
TOTAL 20-0-07 28
II SEMESTER
1 Computer Aided Risk Analysis 4-0-0 4
2 Safety in Construction 4-0-0 4
3 Fire Engineering and Explosion
Control
4-0-0 4
4 Elective -III(Group B) 4-0-0 4
5 Elective- IV(Group B) 4-0-0 4
6 Field Visit 0-0-4 4
7 Seminar – II 0-0-3 2
8 Comprehensive Viva Voce-II 2
TOTAL 20-0-07 28
III SEMESTER
1 Dissertation interim evaluation 10
2 Comprehensive Viva 3
3 Seminar on Dissertation 2
TOTAL 15
IV SEMESTER
1 Dissertation Open Defence 5
2 Dissertation evaluation 20
TOTAL 25
Electives for I-Semester in Group-A Electives for II-Semester in Group-B
Regulation for Health, Safety and Environment
Environmental Pollution Control
Human Factors Engineering
Quality Engineering
Introduction to fire science and dynamics
Environmental impact and risk assessment
Optimization
Electrical Safety
Safety in Material Handling
Design of Air pollution control system
Industrial Noise and Vibration Control
Quantitative methods in fire safety engineering
Engineering Project Management
Earthquake analysis and design
Flood risk management
Safety in offshore structures
Machine Foundations
Ajaya Kumar Nayak
43
Research Summary
My background and research interests are in the areas of manufacturing, experimental, analytical and
computational mechanics of materials and structures in strategic applications. My research has focused on
the following areas:
Finite Element Method, Analytical and Experimental Techniques, Composite Plates and Shells, System
Identification, Vibration Control, Stability of Structures, Impact Analysis, Damage Detection and
Structural Health Monitoring, Failure Analysis of Joints, Shape Memory Alloys, Piezo-electric
Composites, Functionally Graded Materials, Manufacturing and Process Modeling of Composite
Structures.
During my PhD, I have developed defect free finite element formulations based on a combination of the
three noded Discrete Kirchhoff theory (DKT) triangular plate bending element, the three noded constant
strain triangle (CST) and the six noded linear strain triangle (LST) to study damping response of
sandwich panels taking into account both frequency independent and frequency dependent damping of
viscoelastic materials. In order to study a wide range of problems, I have developed two new Co four and
nine node assumed strain finite element formulations of a refined third order theory which did not require
shear correction factors and analyzed isotropic, orthotropic, and layered anisotropic composite and
sandwich plates under free vibration, damping and transient loading conditions. Parametric effects of
plate aspect ratio, length to thickness ratio, degree of orthotropy, number of layers and lamination scheme
on the natural frequencies (free vibration), loss factors (damping) and dynamic (transient) responses were
investigated. The results presented in this investigation have been useful in better understanding the
behavior of sandwich laminates under dynamic conditions and are potentially beneficial for designers of
sandwich structures.
A significant focus of my research has been on the development of innovative manufacturing,
experimental, analytical and computational techniques to analyze and design materials and structures that
are used in various engineering applications. These experimental and numerical methods have been
validated against standard benchmark problems to ascertain their behavior in both static and dynamic
loading environments. Since defects in structures are predominant during manufacturing stages, a defect
methodology has been established to understand the behavior of structures in practice. Currently
manufacturing, experimental, analytical and computational techniques are being pursued to study the
reliability analysis of materials and structures.
Due to the high performance requirement in aircraft engine parts such as fan blade and fan case, the
composites must confirm to varying specifications. In order to manufacture defect free air worthy
components like fan containment cases, the manufacturing aspects are very important. Most recently
inline infusion has become a very cost effective approach in meeting the challenging needs of aerospace
industry. I have developed novel computational techniques to analyze through thickness infusion of resin
in composite parts for aircraft composite fan cases.
Ajaya Kumar Nayak
44
Proposed Research Plan
Composites are being increasingly considered for use in Energy efficient, Green and Sustainable
technologies such as Buildings, Bridges, Railway Tracks, Ship Structures, Underwater Turbines and
Offshore Wind Turbines among other applications. A brief outline of my research plan on such materials
and structures for above mentioned application areas is given below.
Topic 1: Composites Waviness and wrinkles sometimes occur in composite materials as a result of
improper lay up of the reinforcing yarns or layers, or from deformations of the reinforcement during de-
buckling or cure of the matrix. The thermal conductivities, thermal expansions and elastic constants of the
wrinkled regions can be significantly different from the corresponding properties of a composite with
straight reinforcements. I plan to carry out both the theory and experiment to understand the above
mentioned defect mechanics parameters on static and fatigue load carrying capacity of composites in
above mentioned applications. I plan to develop Non Destructive Evaluation (NDE) methods to detect
and characterize flaws and to determine the material properties of the test specimens. I plan to carry out
both computational and experimental approach to deal with NDE of composites with defects. This will be
achieved with application of low frequency vibration, ultrasonic, acoustic absorption, thermo-sonic and
acoustic emission methods to the characterization and integrity assessment of composite structures.
Topic 2: Structural Health Monitoring Renewed interest in the application of piezoelectric materials to
construct smart structures has led to extensive research efforts to fully characterize the sensory and active
behavior of these materials which needs the development of novel analytical, experimental and numerical
techniques. As a consequence of super-elastic and shape memory behavior, shape memory alloys lend
themselves to many innovative applications. I plan to carry out detailed experimental and theoretical
investigations to gain further insights into their super-elastic behavior. The gradual change of material
properties as a function of position along certain dimensions of the structure can be tailored to different
applications and working environments. Theoretical as well as experimental studies will be carried out to
assess the behavior of functionally graded materials in various conditions.
Topic 3: Processing The distinctive characteristic of composite processes to produce large composite
structures in above mentioned applications is that the material is engineered simultaneously with the final
part. Resin transfer molding allows the manufacture of high quality parts with a short process cycle and
thus has great potential for the structures. I plan to develop methodology for the physical phenomena
during processing like heat transfer, cure kinetics, resin flow, laminate compaction, residual stresses so as
to reduce the experiments. I would like to undertake both experimental and theoretical understanding of
resin flow in the laminate taking into account factors affecting in-plane infusion, through thickness
infusion, permeability, viscosity, contact angles, capillary pressure, compaction pressure, compressibility,
pressure, temperature, isothermal and varying viscosity parameters.
Ajaya Kumar Nayak