Analytical model of thin-walled corrugated tubes with sinusoidal patterns under axial impacting
Analytical model of thin-walled corrugated tubes with sinusoidal patterns under axial impacting
复制标题
正弦波薄壁波纹管轴向冲击解析模型
DOI：
10.1016/j.ijmecsci.2017.03.033
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发表时间：
2017-08-01
影响因子：
7.3
通讯作者：
Wang, Zhihua
中科院分区：
文献类型：
--
作者：
Hao, Wenqian;Xie, JiaMiao;Wang, Zhihua
具有特殊波纹表面的波纹管由于可以减小冲击力而具有广泛的工程应用。波纹管在轴向冲击作用下的动力响应属于“Ⅱ型结构”响应。波纹管中的惯性效应主要是横向惯性效应，轴向惯性效应可以忽略不计。在考虑偏心系数和振幅系数的基础上，提出了三种塑性铰机制和动力渐进屈曲的理论模型。结果表明，偏心系数和振幅系数与位移和冲击力有关，而总吸收能量与偏心系数无关。在塑性铰的形成过程中存在一个临界折叠角。理论结果与前人的数值计算和实验结果进行了比较。理论预测的波纹管具有受力一致、初始冲击力小的特点。为波纹管在轴向冲击下的动力响应研究提供了参考。
Corrugated tube with a special corrugated surface has wide engineering applications because it can decrease the impacting force. The dynamic response of corrugated tube under axial impacting belongs to the "Type II structure' response. The main inertia effect in corrugated tube is lateral inertia and the axial inertia effect is negligible. By taking the eccentricity factor and amplitude factor into account, three plastic hinge mechanisms and a theoretical model of dynamic progressive buckling are proposed. The results conclude that displacement and impacting force are related to the eccentricity factor and the amplitude factor, but total absorption energy is independent of the eccentricity factor. There is a critical folding angle during the formation process of plastic hinges. The theoretical results are compared well with the numerical and experimental results of previous studies. The theoretical predict of corrugated tube produces excellent characteristics in term of force-consistent and low initial impacting force. And it also provides a reference to the research of the dynamic response of corrugated tube under axial impacting.