Crushing analysis of multi-cell thin-walled rectangular and square tubes under lateral loading
Crushing analysis of multi-cell thin-walled rectangular and square tubes under lateral loading
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DOI：
10.1016/j.compstruct.2016.10.106
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发表时间：
2017-01
影响因子：
6.3
通讯作者：
TrongNhan Tran
中科院分区：
文献类型：
--
作者：
TrongNhan Tran
研究了多室薄壁矩形管和方管在横向载荷作用下的挤压变形行为。考虑破碎力效率（CFE）表明，腹板与角部的连接方式（W2C）比腹板与腹板的连接方式（W2W）更有效。在侧向挤压情况下，W2C连接形式的多室方管比W2C或W2W连接形式的多室矩形管更有效。基于改进的简化超折叠单元（ISSFE）理论，针对各种管材的破碎过程，建立了破碎力的理论模型。塑性铰线控制着平均破碎力，它是材料流动应力、壁厚和管长度的函数。峰值破碎力基于平均破碎力和破碎力效率来确定。理论计算结果与实验数据吻合较好。
Crushing behaviors of multi-cell thin-walled rectangular and square tubes are investigated in case of lateral loading. Considering crushing force efficiency (CFE) shows that the connecting type of web-to-corner (W2C) is more efficient than that of web-to-web (W2W). Multi-cell square tube with connecting type of W2C is more effective than multi-cell rectangular tube with connecting type of W2C or W2W in lateral crushing case. The theoretical models of the crushing force are proposed based on improved simplified super folding element (ISSFE) theory and the crushing process for all types of tubes. The plastic hinge lines control the mean crushing force, which is a function of flow stress of material, wall thickness, and length of tube. The peak crushing force is determined based on the mean crushing force and the crushing force efficiency. The theoretical results compare well with the experiment data.