Abstract The effect of circular cut-out and low velocity impact damage on shear buckling and post-buckling performances of composite plates was investigated experimentally and numerically. Numerical solution for the buckling problem was obtained using an approximate Ritz method. Experiments were carried out for shear loaded pristine and damaged specimens, with a comparison of out of plane displacements, strain field, failure modes and mechanisms. For the two different thicknesses tested namely thin and thick laminates, experimental results showed a decrease of 25% and 27% in the post-buckling load for impact damage and center circular cut-out, respectively for the thin laminate. Whereas no significant reduction was detected for the thick laminate. A good correlation between numerical and experimental results were shown in the results.

中文翻译：

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中心圆切口和低速冲击损伤对复合层压板剪切屈曲和后屈曲的影响

摘要 通过实验和数值方法研究了圆形切口和低速冲击损伤对复合板剪切屈曲和后屈曲性能的影响。屈曲问题的数值解是使用近似 Ritz 方法获得的。对剪切加载的原始试样和损坏试样进行了实验，比较了平面外位移、应变场、破坏模式和机制。对于两种不同厚度的测试，即薄层压板和厚层压板，实验结果表明，薄层压板的冲击损伤和中心圆形切口的屈曲后载荷分别降低了 25% 和 27%。而厚层压板没有检测到显着减少。结果显示了数值和实验结果之间的良好相关性。