A novel multi-cell CFRP/AA6061 hybrid tube and its structural multiobjective optimization
A novel multi-cell CFRP/AA6061 hybrid tube and its structural multiobjective optimization
复制标题
DOI：
10.1016/j.compstruct.2018.10.112
复制
发表时间：
2019-02
影响因子：
6.3
通讯作者：
H. Yu;Huiru Shi;Siji Chen
中科院分区：
文献类型：
--
作者：
H. Yu;Huiru Shi;Siji Chen
提出了一种新型碳纤维增强塑料-铝合金(CFRP/AA6061)五孔圆角(C5C)异型材混杂管材。与现有的混杂管材不同，这种新型结构由碳纤维布包裹的C5C型材铝合金管材组成。对C5C混杂管轴向压缩进行了数值模拟和实验研究。验证了CFRP建模和CFRP与AA6061管材界面建模的参数。以C5C型材的最优尺寸和CFRP筋的最优夹角为目标，进行了两次多目标优化。比较了C5C混杂管材与普通异型材管材的吸能性能和峰值压力。讨论了缠绕对能量吸收和峰值力的影响。结果表明，新型混合管具有良好的吸能性能。它可以避免普通型材管子经常出现的不稳定开裂和早期开裂。C5C CFRP/AA6061管的比能量吸收(SEA)比各组分管的SEA之和大16.7%。缠绕可以产生耦合放大效应，通过缠绕制备的CFRP/Al杂化管状结构是一种很有前途的轻量化材料。
A novel carbon fiber reinforced plastics-aluminum alloy (CFRP/AA6061) hybrid tube with five-cell-rounder-corner (C5C) profile was presented in this paper. Different from the available hybrid tubes, the novel structure consisted of a C5C-profile aluminum alloy tube wrapped by CFRP cloths. Numerical simulations and experiments of the C5C hybrid tubes subjected to axial compression were performed. The parameters of modelling CFRP and modelling the interface between CFRP and AA6061 tube were validated. Two multi-objective optimizations aiming to obtain the optimal dimensions of the C5C profile and the optimal angles of the CFRP plies were conducted. The energy absorption and the peak force of the C5C hybrid tube were compared with that of the tubes with common profiles. The effect of wrapping on the energy absorption and the peak force was discussed. The results showed that the novel hybrid tube had excellent energy absorption performance. It could avoid the unstable cracking and early cracking that often occurred to the tubes with common profiles. The specific energy absorption (SEA) of the C5C CFRP/AA6061 tube was 16.7% larger than the SEA sum of the constituent tubes. Wrapping could produce a coupling amplification effect and CFRP/Al hybrid tubular structures manufactured by wrapping were promising materials in light weighting.