This study experimentally investigates the effect of the opening configuration on the buckling stability and bearing performance of a structural beam web used in a commercial aircraft made of composite materials. The buckling and strength analyses on three opening configurations (circular, oblong, and rhombic) were carried out using test samples with identical web surface size. It is found that the rhombic opening has the minimum effect on the buckling stability and strength of the structure. To compensate for the effect of the opening, two reinforcement methods, using reinforcement rib and thickening the sample, were also investigated in this study. It is concluded that thickening the sample can more effectively improve the buckling stability and strength performance of beam web structure and hence has relatively higher structural reinforcement efficiency.

中文翻译：

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开口构型和加固方法对复合材料翼缘腹板屈曲和强度影响的试验研究。

这项研究实验研究了开口结构对复合材料制成的商用飞机中使用的结构梁腹板的屈曲稳定性和轴承性能的影响。使用具有相同腹板表面尺寸的测试样品对三种开口构造（圆形，长方形和菱形）进行了屈曲和强度分析。发现菱形开口对结构的屈曲稳定性和强度影响最小。为了补偿开口的影响，在这项研究中还研究了使用加强筋和加厚样品的两种加强方法。