Structure design and multiobjective optimization of CFRP/aluminum hybrid crash box,Polymer Composites

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Structure design and multiobjective optimization of CFRP/aluminum hybrid crash box
Polymer Composites ( IF 4.8 ) Pub Date : 2020-07-13 , DOI: 10.1002/pc.25705
Qihua Ma _{1,

2,

3} , Yibin Zha _{1,

3} , Boyan Dong _{1,

3} , Xuehui Gan _{2,

3}

Affiliation

To improve the crashworthiness and reduce vehicle weight, a crash box made of carbon fiber reinforced plastics (CFRP)/aluminum (Al) hybrid materials was introduced in the paper. Quasistatic axial compression tests and numerical simulations were conducted for pure Al tubes and CFRP/Al hybrid tubes. The simulation models were validated and were further employed to investigate the effects of geometry, aluminum tube thickness, fiber wrapping angle and CFRP layers on the crashworthiness of the hybrid crash box under axial loading and 30Â° oblique collision. The multiobjectives were taken to obtain the optimal geometrical dimensions, aluminum tube thickness, wrapping angle, and the number of layers. The crashworthiness of the optimal CFRP/Al hybrid crash box was compared with that of original aluminum crash box. It was found that the mass of the crash box was reduced by 35.21%, while the specific energy absorption (SEA) and mean crushing force (F_mean) were increased by more than 18% and 46%, respectively. The paper was aimed to provide some references for the design and optimization of composite crash box.

中文翻译：

CFRP /铝杂物箱的结构设计与多目标优化

为了提高耐撞性并减轻车辆重量，本文介绍了一种由碳纤维增强塑料（CFRP）/铝（Al）混合材料制成的防撞箱。对纯铝管和CFRP / Al混合管进行了准静态轴向压缩试验和数值模拟。验证了仿真模型，并将其进一步用于研究几何形状，铝管厚度，纤维包裹角和CFRP层在轴向载荷和30°倾斜碰撞下对混合碰撞盒的耐撞性的影响。采取多目标以获得最佳的几何尺寸，铝管厚度，包角和层数。比较了最佳CFRP / Al混合碰撞箱与原始铝制碰撞箱的耐撞性。F _mean）分别增加了18％和46％以上。本文旨在为复合防撞箱的设计和优化提供一些参考。

更新日期：2020-07-13

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