Extensible plastic collapse of thin-wall frusta as energy absorbers
Extensible plastic collapse of thin-wall frusta as energy absorbers
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DOI：
10.1016/0020-7403(86)90070-6
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发表时间：
1986
影响因子：
7.3
通讯作者：
A. Mamalis;D. Manolakos;S. Saigal;G. Viegelahn;W. Johnson
中科院分区：
文献类型：
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作者：
A. Mamalis;D. Manolakos;S. Saigal;G. Viegelahn;W. Johnson
研究了薄壁台在轴向压缩下的“手风琴”型屈曲问题。在塑料铰链处弯曲和在铰链之间拉伸金属所消耗的能量被最小化，因为坍塌导致的高度总下降。由于拉伸引起的截面变薄被忽略。建立了理论模型并进行了数值计算，结果表明了长细比、t/D和锥体半顶角的影响。与已有的实验结果进行比较，结果在定性上符合趋势。
The crumpling of thin-walled frusta, under axial compression, in the ‘concertina’mode is studied. The energy expended in bending at the plastic hinges and in stretching the metal between the hinges is minimized for the total decrease in height due to collapse. The thinning of the cross-section due to stretching is neglected. A theoretical model has been developed and numerical results are obtained that show the effect of slenderness, t/D, and the semi-apical angle of the frusta. Good qualitative agreement in trends is exhibited when comparison with available experimental results is made.