Evaluation of interface fracture toughness in SiC fiber reinforced titanium matrix composite

• 作 者: 原梅妮 杨延清 黄斌 李健康 陈彦
• 机 构: School of Materials Science and Engineering,Northwestern Polytechnical University,Xi'an 710072,China
• 出 处: Transactions of Nonferrous Metals Society of China
• 发表日期: 2008年04期
• 关键词: toughness titanium reinforced interfacial friction frictional specimen Poisson c

The finite element method based on the equivalent domain integral technique was developed to simulate the push out test and evaluate the interfacial fracture toughness of SiC reinforced titanium matrix composites. A special subroutine was introduced while modeling the push-out test to control interfacial failure process. In addition, the residual stresses, Poisson ratio and friction stresses were all considered in the finite element analysis and the interface debonding was described as a continuous process. The results show that the interfacial fracture toughness of SiC/Timetal-834 is about 50 J/m2. Moreover, the effects of various parameters on the interfacial fracture toughness and the variations of energy release rates at both ends of the specimen were analyzed in detail.

The finite element method based on the equivalent domain integral technique was developed to simulate the push out test and evaluate the interfacial fracture toughness of SiC reinforced titanium matrix composites. A special subroutine was introduced while modeling the push-out test to control interfacial failure process. In addition, the residual stresses, Poisson ratio and frictional stresses were all considered in the finite element analysis and the interface debonding was described as a continuous process. The results show that the interfacial fracture toughness of SiC / Timetal-834 is about 50 J / m2. Moreover, the effects of various parameters on the interfacial fracture toughness and the variations of energy release rates both ends of the specimen were analyzed in detail.