Experimental and simulation analysis of energy absorption capacity of 3D printed structure design
Closed-foam cellular structures are widely used for energy absorption owing to their unique properties. This report investigates features that enhances energy-absorption in foams and compares the effect with other types of structures. A 15mm cubed graded closed foam model with an average densi...
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| Format: | Final Year Project |
| Language: | English |
| Published: |
Nanyang Technological University
2024
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| Online Access: | https://hdl.handle.net/10356/176643 |
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| Institution: | Nanyang Technological University |
| Language: | English |
| Summary: | Closed-foam cellular structures are widely used for energy absorption owing to their unique
properties. This report investigates features that enhances energy-absorption in foams and
compares the effect with other types of structures. A 15mm cubed graded closed foam model
with an average density of 0.6 together with 4 other closed-foam models of densities of 0.2,
0.4, 0.6 and 0.8 will be created with the use of Computer Aided Design (CAD) software. 316
stainless steel was assigned to all 5 models for the simulation with a compression velocity of
1m/s. The test was simulated with the use of ANSYS, a Finite Element Analysis(FEA) software
to understand how the addition gradient feature influences energy absorption and other
properties. Results showed that energy absorption and density of the closed-foam model are
correlated with the total energy absorption of the model increasing as the relative density
increases. The graded model performed very well relative to its equivalent density counterpart
in terms of energy absorption, performing similarly to the 0.8 density model. Further analysis
reveals that overall, the energy absorption efficiency decreases as the density of the model
increase with the graded model having the lowest density. Future studies could explore the
other different features or combinations that can be implemented together with a closed-cell
foam model, farther optimizing and enhancing the energy absorption of the structure. The
findings of this study can help contribute experimental data to high density closed-foam models
as well as development of lightweight and efficient energy absorbent structures |
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