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Study on Impact Mechanical Properties of Reentrant Bionic Automotive Energy Absorbing Box
1China Automotive Technology and Research Center Co. Ltd., Tianjin 300300, China.
Applied Bionics and Biomechanics
|January 16, 2023
Summary
Bioinspired structures like honeycomb and negative Poisson
Area of Science:
- Mechanical Engineering
- Biomimetics
- Materials Science
Background:
- Automotive energy absorption (EA) boxes are crucial for vehicle safety.
- Improving the energy absorption capabilities of these boxes is an ongoing challenge.
- Bioinspired designs offer potential for enhanced structural performance.
Purpose of the Study:
- To design and evaluate novel bioinspired structures for automotive energy absorption boxes.
- To enhance the energy absorption (EA) effect of traditional automotive EA boxes.
- To investigate the mechanical properties of spider web-inspired structures.
Main Methods:
- Designing four bionic structures: honeycomb structure (HS), arc-honeycomb structure (AHS), negative Poisson structure (PS), and arc negative Poisson structure (APS).
- Integrating these bionic structures into a standard automotive EA box.
- Conducting experiments and simulations to assess mechanical properties and energy absorption.
Main Results:
- AHS and APS demonstrated superior energy absorption (EA) compared to HS and PS.
- Specific energy absorption for AHS and APS also surpassed HS and PS.
- All bioinspired EA box structures showed significant improvements over traditional designs, with AHS showing the highest increase (117%).
Conclusions:
- Bioinspired structures, particularly AHS and APS, significantly enhance automotive energy absorption box performance.
- Spider web-inspired designs provide effective strategies for improving structural energy absorption.
- This approach offers a simplified pathway for optimizing engineering structural designs.
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