Axial crushing of tapered circular tubes with graded thickness
Axial crushing of tapered circular tubes with graded thickness
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分级厚度锥形圆管的轴向破碎
DOI：
10.1016/j.ijmecsci.2014.11.022
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发表时间：
2015-03
影响因子：
7.3
通讯作者：
Wen Zhuzhu
中科院分区：
文献类型：
--
作者：
Zhang Xiong;Zhang Hui;Wen Zhuzhu
本文旨在研究渐变厚度锥形圆管（TCTGT）在轴向载荷作用下的吸能特性。在锥形管机上制备TCTGT试样，研究了成形对挤压响应的影响。对原始直圆管和制造的TCTGT进行了测试和比较，分析了TCTGT的相对优点。采用非线性有限元程序LS-DYNA对试验进行了数值模拟，并对其简化制作过程进行了模拟。结果表明，制备的tctgt吸能效率明显高于直管，成形效果对吸能效率的提高有重要影响。此外，提出了一种新的方法来预测有和没有成形效应的圆管和锥形管的平均破碎力。本文的研究结果将有助于设计具有更好耐撞性能的TCTGT结构。
This paper aims to investigate the energy absorption characteristics of tapered circular tubes with graded thickness (TCTGT) under axial loading. TCTGT specimens were fabricated by a tube tapering machine and the forming effects on crush response were investigated. Both the original straight circular tube and the fabricated TCTGT were tested and compared to analyze the relative merits of TCTGT. Numerical simulations of the tests were conducted by using nonlinear finite element code LS-DYNA and a simplified fabrication process was also simulated. The energy absorption efficiency of the fabricated TCTGTs was found to be considerably higher than that of straight tubes and the forming effects showed important influence on the increase of efficiency. In addition, a novel approach was proposed to predict the mean crushing force of circular and tapered tubes with and without forming effects. The outcomes of the present study will facilitate the design of TCTGT structures with better crashworthiness performance.
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DOI：
10.1016/j.ijmecsci.2004.03.006
发表时间：
2004-02-01
影响因子：
7.3
作者：
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通讯作者：
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DOI：
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发表时间：
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期刊：
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影响因子：
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影响因子：
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发表时间：
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影响因子：
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影响因子：
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