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准静态压痕力作用下复合材料层合板的凹坑深度预测方法

, PP. 144-149

Keywords: 静压痕,损伤阻抗,接触力,凹坑深度,渐进损伤分析

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Abstract:

建立了一种在准静态压痕力作用下复合材料层合板凹坑深度的预测方法。首先采用基于应变描述的Hashin和Yeh失效准则并结合有限元法,对复合材料层合板在准静态压痕力作用下的失效过程进行渐进损伤分析,获取一系列的材料性能退化信息。其次采用Sun的方法对局部损伤区材料的弹性参数进行等效处理。最后结合Turner的接触理论预测了凹坑深度-接触力曲线。计算结果表明,基体开裂与分层是导致层合板开始产生凹坑的主要原因,纤维断裂是导致凹坑深度急剧增加的主要原因。分层起始载荷、最大接触力及各自相应的凹坑深度的预测结果与试验值具有较好的一致性。

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