含切口复合材料加筋板的压缩剩余强度研究

PROGRESSIVE FAILURE ANALYSIS OF STIFFENED COMPOSITE PLATE WITH NOTCH

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。

The mechanical responses of stiffened composite plates with a notch under compression were investigated by experiment and FEA method with a progressive failure procedure. The damage propagation and failure property of a stiffened panel reinforced by stitch with discrete-source had been studied. The results indicated that at the tip of the notch there was high stress concentration and damage occurred firstly. The buckling and collapse of the intact ribs in the direction of the notch and the edges of plate resulted in ultimate failure of the stiffened plate. The FEA method with progressive failure procedure based on Maximum Strain Criterion and Hashin Criterion simulated the notched stiffened composite panels＇ damage evolution effectively. The analytical results were in good agreement with the experimental data.