含断裂纤维的SiC_f/Ti-6Al-4V复合材料纵向性能研究

Study on Longitudinal Properties of SiC_f/Ti-6Al-4V Composite Including Broken Fiber

采用ANSYS有限元法对含断裂纤维的SiC_f/Ti-6Al-4V复合材料纵向拉伸性能进行分析。结果表明,纤维体积分数越高,该复合材料抗拉强度越高,而相应的应变越低。但纤维体积分数的高低对该复合材料失效模式没有影响。界面剪切强度对该复合材料的抗拉强度和失效模式均有明显影响,低的界面剪切强度导致较低的抗拉强度和渐进的复合材料失效;高的界面剪切强度导致较高的抗拉强度和灾难性的复合材料失效。

The longitudinal tensile properties of SiCp/Fi-6A1-4V composite including broken fiber were analyzed by ANSYS finite element method. The results show that the tensile strength of the composite increases with increasing fiber volume fi＇action, while the corresponding strain is reverse. But the failure mode of the composite does not change with fiber volume fraction changing. Interracial shear strength has an obvious effect on tensile strength and failure mode of the composite. The composite exhibits low tensile strength and progressive failure with weak interfacial bond strength. The composite exhibits high tensile strength and catastrophic failure with strong interfacial bond strength.