Crashworthiness and optimization design of quadruple-cell Aluminum/CFRP hybrid tubes under transverse bending
Crashworthiness and optimization design of quadruple-cell Aluminum/CFRP hybrid tubes under transverse bending
复制标题
四胞铝/CFRP混合管横向弯曲耐撞性及优化设计
DOI：
10.1016/j.compstruct.2019.111753
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发表时间：
2020-03-01
影响因子：
6.3
通讯作者：
Zhang, Xiong
中科院分区：
文献类型：
--
作者：
Huang, Zhixin;Zhang, Xiong
本文旨在研究四单元Al/CFRP（铝/碳纤维增强塑料）混合管在准静态和动态载荷下的弯曲塌陷和耐撞性。首先对纯铝管和不同包角的铝/CFRP混合管进行三点弯曲试验。实验结果表明，CFRP包裹对混合结构吸能效率的增强效果受到多种因素的影响。然后利用ABAQUS/Explicit进行数值分析，仿真结果与实验结果吻合良好。经过验证的数值模型进一步用于研究部分包覆、包覆角度和层厚对 Al/CFRP 混合管耐撞性的影响。结果表明，包覆角和铺层厚度的增加可以增强其抗弯能力，延缓或避免下翼缘CFRP的断裂。具有适当部分包裹的 Al/CFRP 管比完全包裹的对应物可以实现高 7.9% 的比能量吸收 (SEA)。此外，采用序贯响应面法（SRSM）优化结构参数，进一步提高混合管的耐撞性。通过 RSM 优化，Al/CFRP 管的 SEA 提高了 30.3%。
This paper aims to investigate the bending collapse and crashworthiness of the quadruple-cell Al/CFRP (aluminum/carbon fiber reinforced plastic) hybrid tubes under quasi-static and dynamic loading. Three-point bending tests were first conducted for pure Al tubes and Al/CFRP hybrid tubes with different wrapping angles. Experimental results showed that the enhancement effect of CFRP wrapping on energy absorption efficiency of hybrid structures was affected by several factors. Numerical analyses were then carried out by ABAQUS/Explicit, and good agreements were achieved between the simulation and experimental results. The validated numerical model was further employed to investigate the effects of the partial wrapping, wrapping angle and ply thickness on the crashworthiness of Al/CFRP hybrid tubes. Results showed that the increase of wrapping angle and ply thickness could enhance the bending resistance and delay or avoid the fracture of CFRP in the bottom flange. The Al/CFRP tube with appropriate partial wrapping could achieve 7.9% higher specific energy absorption (SEA) than the entirely wrapped counterpart. In addition, the sequential response surface method (SRSM) was adopted to optimize the structural parameters and to further improve the crashworthiness of the hybrid tubes. The SEA of the Al/CFRP tube was increased by up to 30.3% by the RSM optimization.