建立了挖补复合材料层合板的有限元模型,并通过渐进损伤分析方法计算了拉伸载荷下挖补结构的极限强度,计算结果与实验结果吻合良好,验证了模型的有效性.分析了该结构的失效过程,得出结构的失效模式为胶层失效.对挖补复合材料层合板的修理参数进行研究,分析了挖补斜度和挖补深度对挖补结构极限强度的影响.结果表明减小挖补斜度以及减小挖补深度都能提高挖补结构的极限强度.
A finite element model of scarf repaired laminates is built in this paper.The ultimate strengths of the repaired structures are calculated with progressive damage analysis method.The predicted results agree well with the experimental ones, so the model is effective.The failure model of these structures is adhesive failure which is obtained by analyzing the failure process of these structures.The effects of scarf ratio and scarf depth on the ultimate strength are analyzed which indicates that the ultimate strength can be improved by decreasing scarf ratio and scarf depth.
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