| MECHANICAL PROPERTIES AND OPTIMIZATION ANALYSIS ON
BATTERY BOX WITH HONEYCOMB SANDWICH COMPOSITE
STRUCTURE |
| Ying Zhao , Jinyu Shi , Kaifeng Wang , Binlin Wang , Chao He , Xiaogang Deng |
| College of Engineering and Technology, Southwest University |
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| ABSTRACT |
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A honeycomb sandwich battery box composed of high-strength steel outer layer, sandwich aluminum alloy
honeycomb and inner layer is proposed. Firstly, the expressions of platform stress, ultimate strain and equivalent elastic
modulus of ‘Y’ honeycomb cell are derived based on deformation mechanism and energy principle under quasi-static
compression, and then the relations among relative density, unit volume energy absorption and thickness coefficient are
acquired. Based on above, the optimal thickness coefficient of honeycomb unit cell can be acquired by utilizing particle
swarm optimization algorithm. Simultaneously, aluminum alloy honeycomb sample is made to verify the accuracy of finite
element simulation and theoretical models under quasi-static compression. Subsequently, the optimal thicknesses of three
layers are optimized with the constraint that the 1st mode frequency is more than 30 Hz. Finally, the mass of the optimized
battery box decreases by 37.26 %, and its static performances increase more largely compared with traditional one. |
| Key Words:
Honeycomb sandwich structure, Out-of-plane mechanical properties, Quasi-static compression test,
Multi-objective optimization, Finite element analysis |
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Corresponding Author.
Ying Zhao , Email. 
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