【摘 要】
：
The longitudinal tensile properties of SiCf/Ti-6Al-4V composites with different fiber volume fractions were simulated by the Monte Carlo 2-D finite element model.The random distribution of fiber strength was expressed by the two-parameter Weibull function
【机 构】
：
Department of Mechanical Engineering, Taiyuan Institute of Technology, Taiyuan 030008, China;School
【出 处】
：
武汉理工大学学报（材料科学版）（英文版）
论文部分内容阅读
The longitudinal tensile properties of SiCf/Ti-6Al-4V composites with different fiber volume fractions were simulated by the Monte Carlo 2-D finite element model.The random distribution of fiber strength was expressed by the two-parameter Weibull function.Meanwhile,contact elements and birth-death elements were used to describe the interfacial sliding process after debonding and fiber breakage (or matrix cracking)respectively,which was realized by subroutine complied in ANSYS-APDL (ANSYS Parametric Design Language).The experimental results show that the yield stress and ultimate tensile strength of SiCf/Ti-6Al-4V composites increase with increasing fiber volume fraction,while the corresponding strain of them is just on the contrary.In addition,almost the same failure mode is obtained in SiCf/Ti-6Al-4V composites with various fiber volume fractions when the interfacial shear strength is fixed.Finally,the tensile strength predicted by finite element analysis is compared with that predicted by Global load-sharing model,Local load-sharing model and conventional rule of mixtures,thus drawing the conclusion that Local load-sharing model is very perfect for the prediction of the ultimate tensile strength.
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