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SMART STRUCTURES AND DYNAMICS LABORATORY Indian Institute of Technology Delhi The Smart Structures and Dynamics Laboratory (SSDL) was founded in 2007 to establish dynamic measurement facilities based on smart materials and to develop new technologies to monitor the health of civil structures. SSDL is furnished with modern equipment such as dynamic signal acquisition systems, LCR meters, oscilloscopes, function generators, portable dynamic shaker and amplifier, accelerometers and many other cutting edge facilities. It uses accelerometers and piezoelectric ceramic (PZT) patches as dynamic response sensors, both in low and high frequencies. In addition, SSDL has a an operational Virtual Smart Structures and Dynamics Laboratory (VSSDL) component with specialised capability to facilitate remote triggered/ simulation based online experiments for engineering students at undergraduate and post graduate level. STRUCTURE PIEZO IDLE STATE ENERGY HARVESTING DEVICE SHM STATE STRUCTURAL HEALTH MONITORING +++ + + ++ --- - - -- Piezoelectric energy harvesting New applications of smart materials in bio-mechanics Specimen FG DMM Circuit Development of low-cost SHM techniques Development of new and effective dynamic response sensors Rebar corrosion and structural durability assessment using piezo-sensors Multipurpose energy dissipation devices 0.00E+00 1.00E04 2.00E04 3.00E04 4.00E04 5.00E04 6.00E04 7.00E04 8.00E04 50 80 110 140 170 200 Frequency (kHz) G (S) CR = 1 CR = 0 CR = 0.51 CR = 0.71 CR = 0.16 CR = 0.9 Electro-mechanical impedance (EMI) technique 0 8 12 16 20 0 100 200 300 400 Distance (cm) Relative ordinat 4 e Undamaged Damage 1 Damage 2 Damage 3 Damage 4 Damage 5 Damage6 Damage 7 Structural Health Monitoring (SHM) 0.00E+00 00E-04 8.00E-04 1.20E-03 1.60E-03 2.00E-03 2.40E-03 0 50 100 150 200 250 Conductance (S) Frequency (kHz) 4. Perfect bond Refined Model Smart Structures and Dynamics Laboratory SSDL RESEARCH AREAS Continuum model Piezo-structure bond elasto- dynamic modelling

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SMART STRUCTURES AND DYNAMICS LABORATORY Indian Institute of Technology Delhi

The Smart Structures and Dynamics Laboratory (SSDL) was founded in 2007 to establish dynamic measurement facilities based on smart materials and to develop new technologies to monitor the health of civil structures. SSDL is furnished with modern equipment such as dynamic signal acquisition systems, LCR meters, oscilloscopes,  function generators, portable dynamic  shaker  and  amplifier,  accelerometers  and  many  other  cutting  edge  facilities.  It  uses  accelerometers  and piezoelectric ceramic (PZT) patches as dynamic response sensors, both in low and high frequencies. In addition, SSDL has a an  operational  Virtual  Smart  Structures  and  Dynamics  Laboratory  (VSSDL)  component with  specialised  capability  to facilitate  remote  triggered/  simulation  based  online  experiments  for  engineering  students  at  undergraduate  and  post graduate level. 

STRUCTUREPIEZO

IDLE STATE

ENERGY HARVESTING DEVICE

SHM STATE

STRUCTURAL HEALTH MONITORING

+ ++ ++ ++- - - -- - -

Piezoelectric energy harvesting

New applications of smart materials in bio-mechanics

Specimen 

FG 

DMM 

Circuit 

Development of low-cost SHM techniques

Development of new and effective dynamic response

sensors

Rebar corrosion and structural durability assessment using

piezo-sensors

Multipurpose energy

dissipation devices

0.00E+00

1.00E‐04

2.00E‐04

3.00E‐04

4.00E‐04

5.00E‐04

6.00E‐04

7.00E‐04

8.00E‐04

50 80 110 140 170 200

Frequency (kHz)

G (S)

CR = 1

CR = 0

CR = 0.51

CR = 0.71CR = 0.16

CR = 0.9

Electro-mechanical impedance (EMI) technique

 

0

8

12

16

20

0 100 200 300 400D istance (cm )

Rel

ativ

e or

dina

t

4

e

undam age

dam age 1

dam age 2

dam age 3

dam age 4

dam age 5

dam age 6

dam age 7

Undamaged

Damage 1

Damage 2

Damage 3

Damage 4

Damage 5

Damage 6Damage 7

Structural Health Monitoring (SHM)

0.00E+00

00E-04

8.00E-04

1.20E-03

1.60E-03

2.00E-03

2.40E-03

0 50 100 150 200 250

Con

duct

ance

(S)

Frequency (kHz)

4.

Perfect bond

Refined Model

Smart Structures and Dynamics Laboratory       

SSDL

RESEARCH AREAS 

Continuum model

Piezo-structure bond elasto-dynamic modelling

   

 

 

 

 

 

 

   

 

 

 

 

 

 

 

 

 

 

 

 

   

 

 

 

 

-500

-450

-400

-350

-300

-250

-200

-150

-100

-50

05.00E-06 1.00E-05 1.50E-05 2.00E-05

CR=0

f‐1 (s)

CR=1

CR=0.71

CR=0.16

CR=0.32, 0.51

CR=0.9

Monitoring of steel bolted joints under fatigue using EMI

technique

Experimental studies related to piezo-electric energy harvesting

Vibration testing of structures

Dynamic behaviour modelling using ANSYS

Wind energy harvesting through piezo-sensors

PROJECTS SPONSORED R & D PROJECTS 

TITLE  INVESTIGATORS  FUNDING AGENCY S. No   

1 Development of Low‐cost Remote Health Monitoring System for Civil/ Mechanical/ Aerospace Structures Using Piezo‐Ceramic Sensors 

Dr. Suresh Bhalla   Prof. Ashok Gupta 

Armament R & D Establishment (DRDO) 

2  Virtual Smart Structures and Dynamics Laboratory (Main Phase)  Dr. Suresh Bhalla  Ministry of Human 

Resource and Development 

3  Experimental Investigations for Evaluation of UV Coated Cement Fibre Boards Under Wind Loads  Dr. Suresh Bhalla   Alstrong Enterprises (India) 

Pvt. Ltd.  

4  Interactive Systems and Coatings for a Sustainable Built Environment  

Dr. Suresh Bhalla  Prof. M. Khare   

UK India Education and Research Initiative (UKIERI) 

5  Experimental Investigations on Glass Fibre Reinforced Cement Components 

Dr. Suresh Bhalla   Prof. B. Bhattacharjee  

Lodhi Property Company Limited  

6  Quality Enhancement in Engineering Education (Pilot Program)  Dr. Suresh Bhalla  Ministry of Human 

Resource and Development                    

S. No  TITLE 

MAJOR CONSULTANCY PROJECTS INVESTIGATORS  FUNDING AGENCY 

1  Investigations and Remedial Measures for Excessive Vibrations at King’s Canyon Building  Dr. Suresh Bhalla   ASF Insignia SEZ Private 

Limited 

2  Advice on Test Procedure for Evaluation of Friction Dampers 

Dr. Suresh Bhalla  Prof. Alok Madan    

Uniforge Bearing Company Private Limited 

3  Investigation and Remedial Measures for Excessive Vibrations in PNB Building at Parliament Street 

Dr. Suresh Bhalla  Prof. Alok Madan    Punjab National Bank 

4  Seismic Qualification of Friction Dampers for Passive Structural Control of Skyscraper Buildings 

Dr. Suresh Bhalla  Prof. Alok Madan Prof. Ashok Gupta   

Uniforge Bearing Company Private Limited 

5  Load Testing of ESIC Hospital at Rohini  Dr. Suresh Bhalla  Prof. Alok Madan   

Hospitech Management Consultants Private Ltd  

6  Finite Element Modeling and Stress Analysis of Cooling Water Duct in Thermal Power Plant.  Dr. Suresh Bhalla   Lanco Infratech Limited 

  Function Generator (Agilent 33210A)

Oscilloscope (TDS 2004B)

Notch after filling concrete

Embedded CVS flushing at top (typ.)

1 2

34

56 7 8 9

10

11-19

Dynamic Shaker (LDS V406)

Amplifier (LDS PA 500L)

Laptop

RC Beam

Connectors for CVS

PZT patches

Cantilever

Dynamic Shaker

AD5933 Circuit Board

Parametric approach for monitoring fatigue damage

y (Ns/m)

Diode CapacitorEnergy Harvesting

Circuit Low cost EMI technique using miniature impedance

analyzer (AD5933) (A low-cost alternative of conventional LCR meter)

 

Simulation studies in COMSOL for piezoelectric energy harvesting based on surface-bonded

and embedded PZT sensors

Bio-medical applications of piezo sensors

Metal wire based variant of EMI technique

Corrosion initiation

Corrosion Propagation

Cracking of concrete

Virtual Smart Structures and Dynamics Lab (VSSDL)Please visit http://ssdl.iitd.ac.in/vssdl/home.html for details

RECENT PUBLICATIONS

Surface Bonded PZT patch(10 mm × 10 mm)

Concrete Beam4 m 

0.16 m 0.21 m

Adhesive bond layer

Predictive models for carbonation and chloride induced corrosion

22 March 2014               WORKSHOP ON STRUCTURAL DYNAMICS: THEORY, EXPERIMENTS AND APPLICATIONS 

07 December 2013      INTERNATIONAL WORKSHOP ON GREEN BUILDING AND SUSTAINABLE 

14 June 2013                    WORKSHOP ON EXPERIMENTAL STRUCTURAL DYNAMICS, STRUCTURAL HEALTH                                           09 March 2013               MONITORING  

26 October 2013           WORKSHOP ON EXPERIMENTAL DYNAMICS, STRUCTURAL HEALTH MONITORING AND                                                  NON‐DESTRUCTIVE  EVALUATION USING SMART MATERIALS 

11 Sept 2013                 WORKSHOP ON STRUCTURAL HEALTH MONITORING OF SUPERSTRUCTURES AND                                                  SUBSTRUCTURES THROUGH MODERN INSTRUMENTATION  

1. luence  of Adhesive Bond  Layer  on  Power  and  Energy  Efficiency  of  Piezo‐Moharana,  S.  and Bhalla,  S.  (2015),  “InfImpedance Transducer”, Journal of Intelligent Material Systems and Structures, Vol. 26, No. 3 (Feb), pp. 247‐259. 

2. mbined Energy Harvesting and Structural Health Monitoring Potential of Embedded Kaur, N. and Bhalla, S. (2015), “CoPiezo‐Concrete Vibration Sensors”, Journal of Energy Engineering (ASCE), DOI: 10.1061/(ASCE)EY.1943‐7897.0000224 

3. Suresh, R., Bhalla, S., Singh, C., Kaur, N., J. Hao and Anand, S. (2015) “Combined Application of FBG And PZT Sensors for Plantar Pressure Monitoring at Low and High Speed Walking”, Technology and Health Care, Vol. 23, No. (Feb), pp. 47‐61.  

4. Moharana,  S.  and  Bhalla,  S.  (2014)  “A  Continuum  Based  Modelling  Approach  for  Adhesively  Bonded  Piezo‐Transducers for EMI  Technique” International Journal of Solids and Structures, Vol. 51, No. 6 (Mar), pp. 1299‐1310. 

5. Talako a,V., Bhalla, S., and Gupta, A. (2014) “Corrosion Assessment of RC Structures Based on Equivalent Structural kulParameters Using EMI Technique”, Journal of  Intelligent Material Systems and Structures, Vol. 25, No. 4  (Mar), pp. 484‐500. 

6. Kaur, N  Bhalla, S. (2014) “Feasibility of Energy Harvesting from Thin Piezo Patches via Axial Strain (d31) Actuation . andMode”, Journal of Civil Structural Health Monitoring, Vol. 4, No. 1 (Feb), pp. 1‐15.   

7. ring of Bones using Piezo‐Transducers”,  Bhalla, S. and Suresh, R. ( 2013) “Condition Monito Meccanica, Vol. 48, No. 9 (Nov),  . 2233‐2244. pp

RECENT WORKSHOPS 

Participants of the Workshop on Experimental Structural Dynamics, Structural Health Monitoring and Non-Destructive Evaluation, 9th March 2013

   

 

 

      

  

  

  

  

  

  

  

  

  

  

  

      

FACULTY MEMBERS ASSOCIATED WITH LAB

• Dr. Alok Madan, Professor, Civil Engineering Department

• Dr. B. Bhattacharjee, Professor, Civil Engineering Department

• Dr. Ashok Gupta, Professor, Civil Engineering Department

PEOPLE

• Dr. Suresh Bhalla, Lab Mentor, Associate Professor, Civil Engineering Department

DOCTORAL/M-TECH PROJECTS

S.NO  NAME  TITLE  GUIDE DOCTORAL PROJECTS COMPLETED

1.  Dr. Ramakant Panigrahi  Development, Analysis and Monitoring of Dismountable Tensegrity Structures 

Prof. A. Gupta, Dr. S. Bhalla 

2.  Dr. Ramashanker  An Integrated Approach for Structural Health Monitoring  Dr. S. Bhalla, Prof. A. Gupta 3.  Dr. Sumedha Maharana 

 Modelling of Piezo‐Structure Elastodynamic Interaction Through Bond Layer for Electro‐Mechanical Impedence Technique 

Dr. S. Bhalla 

4.  Dr.  T.  Visalakshi   

Corrosion Assessment in Rebars of RC Structures Using Equivalent Parameters Extracted from Piezo‐Patches 

Dr. S. Bhalla, Prof. A. Gupta 

5.  Dr. Naveet Kaur  Integrated Structural Health Monitoring and Energy Harvesting from Thin Piezo Sensor Patch Via Axial Strain Actuation Mode 

Dr. S. Bhalla 

DOCTORAL PROJECTS IN PROGRESS1.  Mr. Shashank Srivastava  Smart Materials in Bio‐Sensing and Actuation  Dr. S. Bhalla, Prof. A. Gupta, Prof. A. Madan 2.   Er. S.K.Dhawan  Residual Life Prediction of Structures  Prof. B. Bhattacharjee, Dr. S. Bhalla 3.  Mr. Jashanjeet Randhawa  Structural Health Monitoring in the Absence of Baseline Data  Dr. S. Bhalla 4.  Ms Susmita Naskar  Structural Health Monitoring Using Piezo Sensors  Dr. S. Bhalla 5.  Mr. Sumit Balguvhar  Piezo‐electric Energy Harvesting  Dr. S. Bhalla 6.  Mr. Mahesh Babu Adala  Structural Control of Building Frames Using Hybrid Control Devices 

Based on Energy Principles Prof. A. Madan and Dr. S. Bhalla 

M‐TECH PROJECTS COMPLETED IN 20151.  Mr. Ajaya Kumar Das  Bio‐Mechanical Application of Piezo‐Materials  Dr. S. Bhalla 2.  Mr. Sailesh Adhikari   Structural Health Monitoring Using Piezo Sensors: Use of dual 

Piezo System Dr. S. Bhalla 

3.  Mr. Bharat Kumar Aggarwal  Wind Energy Harvesting Using Piezoelectric Transducers  Dr. S. Bhalla 4.  Mr. Rishi Kapoor  Analysis and Health Monitoring of Machine Foundations  Dr. S. Bhalla 

Please visit http://web.iitd.ac.in/~sbhalla for details on other completed projects

SSD LAB TEAM

(L to R) Mr. Sumit Balguvhar, Mr. Sailesh Adhikari, Mr. Sumit Dahiya, Ms Susmita Naskar, Dr Naveet Kaur, Dr Suresh Bhalla (Lab Mentor), Mr. Ajaya Kumar Das, Er. S K Dhawan Mr. Bharat Kumar Aggarwal, Mr. Arjun Jamil 

Dr. Suresh Bhalla (Lab Founder and Mentor) Smart Structures and Dynamics Lab

il Engineering Department, Block-V, Room No. - 21Civ 1

Phone: (+91)11-2659-1040, Email: [email protected] Institute of Technology Delhi, India-110016

, Web: http://ssdl.iitd.ac.in