纤维排布方式对SiC/Ti材料残余应力影响的有限元分析

Finite Element Analysis for Effects of Fiber Arrays on the Residual Stress of SiC Fiber Reinforced Ti-Matrix Composite (SiC/Ti)

摘要:

采用三维有限元法模拟SiC/Ti-6Al-4V复合材料界面的残余应力分布，分析纤维排列方式对纤维一侧界面残余应力的影响。结果表明，纤维排列方式对纤维一侧界面径向、轴向和周向残余应力均有较大影响，其中纤维六方排列时纤维一侧界面残余应力沿纤维周向分布均匀，且周向残余应力小，不易在界面形成径向裂纹，是较为理想的纤维排列方式。

Abstract:

Interfacial residual stress distribution of SiC/Ti-6Al-4V composite was simulated by a three-dimensional finite element method. The effects of fiber arrays on interfacial residual stresses were discussed. Results show that the fiber array has great influences on radial, axial and circumferential residual stress. Among them hexagonal fiber array is an ideal arrangement pattern due to uniform distribution of interfacial residual stresses along the circumferential direction and low circumferential residual stress, which makes it difficult to generate radial crack.