采用细观力学方法对正交铺设陶瓷基复合材料单轴拉伸应力-应变行为进行了研究.采用剪滞模型分析了复合材料出现损伤时的细观应力场.采用断裂力学方法、临界基体应变能准则、应变能释放率准则及Curtin统计模型4种单一失效模型确定了90°铺层横向裂纹间距、0°铺层基体裂纹间距、纤维/基体界面脱粘长度和纤维失效体积分数.将剪滞模型与4种单一损伤模型结合,对各损伤阶段应力-应变曲线进行了模拟,建立了复合材料强韧性预测模型.与室温下正交铺设陶瓷基复合材料单轴拉伸应力-应变曲线进行了对比,各个损伤阶段的应力-应变、失效强度及应变与试验数据吻合较好.分析了90°铺层横向断裂能、0°铺层纤维/基体界面剪应力、界面脱粘能、纤维Weibull模最对复合材料损伤及拉伸应力-应变曲线的影响.
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