Analytical-Experimental Correlation for a Stiffened Composite Panel Loaded in Axial Compression
Analytical-Experimental Correlation for a Stiffened Composite Panel Loaded in Axial Compression
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DOI：
10.2514/2.2772
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发表时间：
2001-03
影响因子：
2.2
通讯作者：
Oung Park;R. Haftka;B. Sankar;J. Starnes;S. Nagendra
中科院分区：
文献类型：
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作者：
Oung Park;R. Haftka;B. Sankar;J. Starnes;S. Nagendra
对复合材料叶片加筋壁板的轴压性能进行了分析和试验研究。本研究首先检验了用于设计面板的简单模型与实际实验条件之间的差异的影响。研究发现，设计过程中采用的大缺陷弥补了设计模型的简化假设，试验失效载荷仅比设计载荷高10%。其次，进行了元素分析，以便将分析结果与实验结果相关联。有限元分析的屈曲载荷与试验破坏载荷吻合较好。然而，面板的面外位移存在很大差异。有限元模拟的非均匀载荷引入与一般的接触dennitions改善测量和预测的面外变形之间的相关性。
A combined analytical and experimental study of a blade-stiffened composite panel subjected to axial compression was conducted. The study e rst examined the effects of the differences between a simple model used to design the panel and the actual experimental conditions. It was found that the large imperfection used in the design process compensated for the simplifying assumptions of the design model, and the experimental failure load was only 10% higher than the design load. Next, e nite element analyses wereperformed in order to correlateanalytical and experimental results. The buckling loads from e nite element analyses agreed well with the experimental failure loads. However, substantial differences were found in the out-of-plane displacements of the panel. Finite element simulations of nonuniform load introduction with general contact dee nitions improved correlation between the measured and predicted out-of-plane deformations.