Energy absorption mechanics and design optimization of CFRP/aluminium hybrid structures for transverse loading
Energy absorption mechanics and design optimization of CFRP/aluminium hybrid structures for transverse loading
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横向加载CFRP/铝混合结构的能量吸收力学和设计优化
DOI：
10.1016/j.ijmecsci.2018.10.043
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发表时间：
2019-01-01
影响因子：
7.3
通讯作者：
Li, Qing
中科院分区：
文献类型：
--
作者：
Sun, Guangyong;Yu, Hang;Li, Qing
研究了纯铝、纯碳纤维复合材料和铝/碳纤维复合材料复合管的弯曲破坏行为和能量吸收能力。实验结果表明，铝/碳纤维复合管的横向吸能比相应的纯铝管和纯碳纤维复合管的横向吸能之和还要高。具体地，CF-AL管（CFRP管被放置在Al管外部）将峰值力增加6.7%，能量吸收增加20.6%。AL-CF管（CFRP管放置在铝管内）将峰值力提高了14.1%，能量吸收提高了19.1%。试验研究表明，CF-AL管具有较好的耐撞性。随后，有限元（FE）分析进行了相关的实验结果。在此基础上，进一步对碳纤维-铝合金复合管的长度、厚度和铺层角度进行了参数研究和优化设计。结果表明，优化后的结构比吸能提高了42.96%，平均破碎力提高了37.75%，同时质量降低了5.02%，耐撞性得到显著提高。
This study aimed to explore bending collapse behavior and energy absorption capacity of net aluminum (Al), net carbon fiber reinforced plastic (CFRP) and Al/CFRP hybrid tubes, respectively. Based upon the experimental tests, the transverse energy absorption of the Al/CFRP hybrid tubes was found to be even higher than the sum of corresponding net Al tube and net CFRP tube. Specifically, the CF-AL tube (the CFRP tube being placed outside the Al tube) increased the peak force by 6.7% and energy absorption by 20.6%. The AL-CF tube (the CFRP tube being placed inside the Al tube) improved the peak force by 14.1% and energy absorption by 19.1%. The experimental study indicated that overall, the CF-AL tube was of better crashworthiness characteristics. Subsequently, finite element (FE) analyses were carried out by correlating with the experimental results. Based upon this validated FE models, a parametric study and design optimization on the CF-AL tube (with respect to length, thickness and ply angle) were further performed. It was found that the optimization increased specific energy absorption (SEA) by 42.96% and mean crushing force by 37.75%; meanwhile the mass of optimum design decreased by 5.02%, exhibiting significant enhancement of crashworthiness characteristics.