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建立了含纤维、基体以及粘弹性界面层三相纤维增强弹性体基复合材料单纤维拔出试验细观力学分析模型,得到了单纤维拔出过程中纤维轴向应力、界面层轴向剪应力、基体轴向应力和轴向剪应力的计算公式。以芳纶纤维增强弹性体基复合材料为对象,研究了纤维埋入长度、纤维体积含量以及界面层厚度对单纤维拔出过程中纤维和界面层应力分布的影响。并将所建模型与部分文献所提模型相比较。结果表明:随着x/l(沿纤维埋入长度方向的坐标)的增加,纤维轴向应力单调增加,而界面层轴向剪应力基本先减小后变大;不同的纤维埋入长度、纤维体积含量以及界面层厚度,纤维轴向应力和界面层轴向剪应力会表现出不同的分布规律。
The micromechanical analysis model of single-fiber pull-out test of three-phase fiber-reinforced elastomer matrix composites with fiber, matrix and viscoelastic interface layer was established. The axial tensile stress, axial shear stress , Matrix axial stress and axial shear stress formula. The effects of fiber embedded length, fiber volume fraction and interfacial thickness on the stress distribution in the fiber and interfacial layer of aramid fiber reinforced elastic matrix composites were investigated. The proposed model is compared with the models proposed in some documents. The results show that the axial stress increases monotonously with the increase of x / l (along the length of fiber embedding), while the axial shear stress of the interfacial layer decreases first and then increases. The embedding length of different fibers, Fiber volume content and interfacial layer thickness, fiber axial stress and interfacial layer axial shear stress will show different distribution.