Bending collapse of square tubes with variable thickness
Bending collapse of square tubes with variable thickness
复制标题
变壁厚方管弯曲塌陷
DOI：
10.1016/j.ijmecsci.2015.12.006
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发表时间：
2016-02
影响因子：
7.3
通讯作者：
Wang Zong
中科院分区：
文献类型：
--
作者：
Zhang Xiong;Zhang Hui;Wang Zong
本文旨在研究变厚度薄壁方管在截面上的弯曲屈曲行为。对翼缘和腹板不同厚度的薄壁方梁进行了三点弯曲试验。翼缘与腹板的相对强度对力响应和变形模式有显著影响。并对实验测试进行了数值模拟，数值结果与实验结果吻合较好。此外，还分析了方管在横向荷载作用下的准静态和动力响应的差异。最后，利用响应面方法对两根薄壁梁在冲击载荷作用下进行了优化设计。优化结果表明，翼缘材料少、腹板材料多是提高梁在横向荷载作用下抗弯性能的有效途径。在腹板中采用渐变厚度是进一步提高梁吸能效率的有效途径，具有广阔的应用前景。
This paper aims to study the bending collapse behavior of thin-walled square tubes with variable thickness in the cross-section. Three-point bending test is carried out for thin-walled square beams with different thickness for flanges and webs. The relative strength of the flanges versus the web plates is found to have significant influence on the force response and deformation pattern. Numerical simulation of the experimental test is also performed and the numerical results compared very well with the experimental results. Moreover, the difference between the quasi-static and dynamic responses of the square tubes under transverse loading is analyzed. A response surface method is finally employed to optimize two thin-walled beams under impact loading. The optimization results show that putting less material in flanges and more in the web plates is an efficient way to improve the bending resistance of the beams under transverse loading. Adopting graded thickness in the web plates is an effective and promising approach to further increase the energy absorption efficiency of the beams.
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影响因子：
8.4
作者：
Eltawahni, H. A.;Olabi, A. G.;Benyounis, K. Y.
通讯作者：
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影响因子：
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作者：
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DOI：
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发表时间：
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影响因子：
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通讯作者：
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影响因子：
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通讯作者：
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影响因子：
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