me 273 final slides
TRANSCRIPT
Hexagonal Infill Columns
Aditya Pralhad Patil
Lincoln Shaun Sanders
Jessica Wong
Introduction
• 3D Printing Landscape: Functional Products, Engineering Tooling, Structural Applications and many more..
• Interesting Materials (ABS & Concrete Variants) + Portable Housing Solution
• Critical Structural Element: Columns
www.kamermaker.com
www.ContourCrafting.org
To Minimize Material Consumption in a 3D Printed ABS Column for Fixed Load and Fixed Dimensions through Variation of Percent Hexagonal Infill and its
Orientation
Motivation
Model Formulation
1.
ABS Column:
Input Parameters• Percent Hexagonal Infill• Infill Angle
ABS Material Properties:• E = 1,810 MPa• σy = 29 MPa• v = 0.35
Diameter 40mm
Length 100mm
Perimeter Wall 1mm
Hexagon Wall 1mm
Ansys Simulation Trick
• Fluid Pressure vs Rigid Bodies
Constraints
• Fixed Base• Fixed Displacement(x,y)• Free Displacement (z)• Pressure = 2.5 MPa
Experimental Validation Plan
Specimen Equipment
Equipment
Printrbot simple metal
Data Acquisition
• Load Cell (Compression): Type: Peizo-resistive Load Capacity: 2 kN
Accuracy: 0.03% Capacity
• Strain gauge Extensometer:Type: Clip on, resistive Gauge Length: 25mm
Accuracy: 0.5% Gauge length
• Fiber Bragg Grating (FBG) based Multi Core Fiber(MCF) Optical Sensing and Interrogator System:Interrogator Type: 4 Channel Model: JPFBG-1000, Jphotonics Inc.
Wavelength Range: 1525～1565nm
Optical Fiber Probe Specs: OFC diameter: 125μmType: Silica core type
Computer Control Electronic Universal Testing Machine: Model No. UE1405 , Laryee Technology Co., Ltd
Stress & Radial Deformation
Cost Estimation
Sl.no Item Description Price per Unit ($) Quantity Total
1 UTM, rent basis 200 1 200
23D Printer- rent per
Job basis25 1 25
3ABS filament
consumables
4 Jigs and FixturesIncluded in the
UTM rent- -
5Data acquisition
unit-PCI control card100 1 100
6MFC FBG Sensor
Interrogator-rent200 1 Set 200
7 Total NA 1 525
Analytical VerificationModel Solid Calculated Solid
Boundary Condition Free-Free Free-Free
Maximum Axial Deformation
4.3e-4 4.3001e-4
Maximum Radial Deformation
3.01e-5 3.0298e-5
Discretization Study
0
0.02
0.04
0.06
0.08
0.1
0.12
0.14
0 50000 100000 150000 200000
Tetra Hedron Radial def v/s Nodes
0.00E+00
5.00E+09
1.00E+10
1.50E+10
2.00E+10
2.50E+10
0 50000 100000 150000 200000
Tetra Hedron Stress v/s Nodes
0
0.02
0.04
0.06
0.08
0.1
0.12
0.14
0 100000 200000 300000 400000
HexaHedron Radial def v/s Nodes
0.00E+00
5.00E+09
1.00E+10
1.50E+10
2.00E+10
2.50E+10
3.00E+10
3.50E+10
0 50000 100000 150000 200000 250000 300000 350000 400000
Hexahedron Stress v/s Nodes
Sensitivity Analysis
= 1.675e-13
= 6.05e-13
Parametric Study
• Response Variable: Maximum Equivalent (von-Mises) Stress
Conclusion
Recommended Column:• 11% Hexagonal Infill• 0° Infill Angle
Maximum Stress• 15.76 MPa
Mass• 27.88 mg