ME 273 FInal Slides
- 1. Hexagonal Infill Columns Aditya Pralhad Patil Lincoln Shaun Sanders Jessica Wong
- 2. 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
- 3. 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
- 4. Ansys Simulation Trick • Fluid Pressure vs Rigid Bodies
- 5. Constraints • Fixed Base • Fixed Displacement(x,y) • Free Displacement (z) • Pressure = 2.5 MPa
- 6. 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: 125μm Type: Silica core type Computer Control Electronic Universal Testing Machine: Model No. UE1405 , Laryee Technology Co., Ltd Stress & Radial Deformation
- 7. Cost Estimation Sl.no Item Description Price per Unit ($) Quantity Total 1 UTM, rent basis 200 1 200 2 3D Printer- rent per Job basis 25 1 25 3 ABS filament consumables 4 Jigs and Fixtures Included in the UTM rent - - 5 Data acquisition unit-PCI control card 100 1 100 6 MFC FBG Sensor Interrogator-rent 200 1 Set 200 7 Total NA 1 525
- 8. Analytical Verification Model 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
- 9. 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
- 10. Sensitivity Analysis = 1.675e-13 = 6.05e-13
- 11. Parametric Study • Response Variable: Maximum Equivalent (von-Mises) Stress
- 12. Conclusion Recommended Column: • 11% Hexagonal Infill • 0° Infill Angle Maximum Stress • 15.76 MPa Mass • 27.88 mg