复合材料加筋壁板压缩屈曲与后屈曲分析

发布时间：2018-05-07 17:38

本文选题：复合材料 + 加筋壁板　；参考：《南京航空航天大学学报》2016年04期

【摘要】：为了建立复合材料加筋壁板承受压缩载荷下屈曲、后屈曲和破坏整个失效过程的数值分析方法,对复合材料加筋壁板进行了压缩稳定性试验和有限元分析研究。采用特征值分析法对加筋壁板进行了屈曲分析,得到加筋壁板的屈曲模态、屈曲特征值及屈曲载荷;根据加载端的载荷-位移曲线采用弧长法(Riks),得到了弧长法的屈曲载荷及后屈曲承载路径;引入失效准则,得到后屈曲直至破坏的承载能力。对比两种有限元分析法与试验结果可以得到:加筋壁板的后屈曲承载能力很大,特征值法分析屈曲载荷较弧长法更精确,而弧长法可以更好模拟后屈曲行为,建立的分析法与试验结果吻合较好。
[Abstract]:In order to establish a numerical analysis method of buckling, post-buckling and failure of composite stiffened panels under compression loading, compression stability tests and finite element analysis of composite stiffened panels were carried out. The buckling modes, buckling eigenvalues and buckling loads of stiffened slabs are obtained by means of eigenvalue analysis. According to the load-displacement curve at the loading end, the buckling load and the post-buckling load path of the arc length method are obtained by using the arc length method, and the load-carrying capacity of the post-buckling to failure is obtained by introducing the failure criterion. Comparing the results of two kinds of finite element analysis and experimental results, it can be concluded that the post-buckling capacity of stiffened slabs is very large, the eigenvalue method is more accurate than the arc-length method, and the arc-length method can better simulate the post-buckling behavior. The established analytical method is in good agreement with the experimental results.
【作者单位】：空军工程大学航空航天工程学院;
【分类号】：V214.8

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