薄壁CFRP圆柱壳脉冲屈曲的数值分析

8th International Conference on Coupled Instabilities in Metal Structures (CIMS 2021) Pub Date : 2021-06-15 DOI:10.2139/ssrn.3867171

M. Zaczynska, H. Abramovich, C. Bisagni

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引用次数: 0

摘要

本文研究了CFRP圆柱壳在脉冲压缩载荷作用下的性能。脉冲内分析采用有限元软件ABAQUS进行数值模拟。采用Budiansky & Hutchinson准则确定了动屈曲载荷。研究了脉冲加载形状、脉冲持续时间等参数对动载系数的影响。研究表明，当脉冲持续时间较短时，DLF趋向于远高于1，而当脉冲持续时间较长时，DLF趋向于1。脉冲形状对DLF值也有显著影响。DLF<1只存在于梯形脉冲。对于正弦脉冲形状，碳纤维布壳的静屈曲载荷始终低于动态屈曲载荷。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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Pulse Buckling of a Thin Walled CFRP Cylindrical Shell – A Numerical Approach

The present study investigates the behaviour of a CFRP cylindrical shell under compressive pulse loading. The in-pulse analyses are performed numerically, using the finite element code ABAQUS. The dynamic buckling load is determined using the Budiansky & Hutchinson criterion. Parameters like the shape of pulse loading and pulse duration were varied, and their influence on the Dynamic Load Factor (DLF) was investigated. The investigation shows that DLF tends to increase well above unity for short duration impulses, while for the larger duration the value is decreasing towards unity. The shape of the pulse also has a significant influence on the DLF value. DLF<1 was found only for a trapezoidal pulse. For sinusoidal pulse shape, the static buckling load of the CFRP shell was consistently below the dynamic one.

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8th International Conference on Coupled Instabilities in Metal Structures (CIMS 2021)

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