Comparative study on thin-walled structures with function graded strength and tapered angle
Comparative study on thin-walled structures with function graded strength and tapered angle
复制标题
功能梯度强度与锥角薄壁结构对比研究
DOI：
10.1080/13588265.2018.1433280
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发表时间：
2019-05-04
影响因子：
1.9
通讯作者：
Hu, Ping
中科院分区：
文献类型：
--
作者：
Dai, Minghua;Ying, Liang;Hu, Ping
摘要本文比较了功能梯度强度直管（SFGS）、锥形均匀强度直管（TUS）和经典均匀强度直管（SUS）在轴向破碎载荷下的耐撞特性。在数值模拟的基础上，对SFGS、TUS和SUS管的耐撞性进行了多重优化。对比研究结果表明，SFGS管与TUS管有一定的相似之处，两者的CFE值明显大于传统SUS管，综合耐撞性相对较好，且Pareto前沿更为突出。然而，SFGS和TUS管之间存在明显差异。所有SFGS管SEA和PCF的相对差异均为正，而TUS管SEA和PCF的相对差异为负。最后，对Pareto锋面的比较表明，如果允许的锥度角足够大，则最好采用锥度角较大的TUS管。
ABSTRACT This paper compares the crashworthiness characteristics of straight functionally graded strength (SFGS), tapered uniform strength (TUS) and classical straight uniform strength (SUS) tubes under axial crushing loading. Based on the numerical simulation, multi-optimisations are performed to optimise the crashworthiness of the SFGS, TUS and SUS tubes. Result of comparative study shows that the SFGS tubes are similar to the TUS tubes to some extent, since both of them have obviously larger CFE value, relatively good comprehensive crashworthiness and more predominant Pareto fronts than the traditional SUS tubes. Nevertheless, obvious differences between SFGS and TUS tubes exist. The relative differences of SEA and PCF for all the SFGS tubes are positive while that of the TUS tubes are negative. Finally, the comparison on Pareto fronts suggests that if the allowable tapered angle is big enough, it is better to employ the TUS tubes with relatively big tapered angle.