建立了桥联纤维细观力学模型,研究了界面对纤维增强陶瓷基复合材料拉伸模量及强度的影响.分别引入纤维应力均匀系数和界面脱粘率作为界面完伞脱粘和局部脱粘条件下界面性能的表征参数.研究表明,应力均匀系数及界面脱粘率越大,材料模量越低,而断裂时纤维所承担的应力越高.基于混合率给出了拉伸强度表达式,同时也分析了基体裂纹分布、界面脱粘和纤维拔出对强度的影响.计算结果表明,本文强度模型给出的预测值与试验值吻合较好.
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