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通过对含穿透切口的复合材料加筋板轴向压缩试验以及有限元渐进损伤模拟分析,研究了加筋板离散源损伤的扩展模式与破坏特征。结果表明,切口前端出现了非常明显的应变集中且最先发生破坏,沿切口方向未切断筋条的屈曲和壁板边缘的突然压溃导致了加筋板的最终破坏。基于最大应变判据和Hashin判据的三维有限元渐进损伤模拟有效的表达了含切口复合材料加筋板的损伤扩展,计算结果与试验吻合较好。
Based on the axial compression test of the stiffened plate with penetrating cut and the finite element progressive damage simulation analysis, the expansion mode and the failure characteristics of the stiffened plate with discrete source damage are studied. The results show that there is a very obvious strain concentration in the front of the incision and the first failure occurs. The buckling of the uncut rib along the incision and the sudden collapse of the edge of the panel lead to the ultimate failure of the stiffened panel. The three-dimensional finite element progressive damage simulation based on the maximum strain criterion and the Hashin criterion effectively expresses the damage propagation of the stiffened plates with incisions. The calculated results are in good agreement with the experimental results.