Fracture Stress of Ceramic particle in Ni Base Alloy Composites
This branch of micromechanics has become extremely sophisticated in recent years with extensive computational modeling to unravel nucleation, growth and coalescence of voids around inclusions to explain ductile fracture of engineering alloys. To predict the ultimate stress of Ni base alloy composites aroused by ceramic particle fracture. A suitable mixed-mode fracture criterion is required. Assume composites strength is coincident with ceramic particle fracture. First, the three-phases model is used to determine the external strains of two-phases cell. Then micromechanical stress field in the matrix is obtained. Based on the generalized thermodynamic force in damage process, the damage equivalent stress can be computed. As the damage equivalent stress is equal to the ultimate stress of the matrix, the fracture stress of ceramic particle in Ni base alloy composites is given.
Ni base alloy composites Ceramic particles the three-phases model the generalized thermodynamic force the fracture stress
KANG Jingxin ZHENG Jian NI Xinhua
Shijiazhuang Mechanical Engineering College, Shijiazhuang 050003, P. R. China
国际会议
北京
英文
2007-08-05（万方平台首次上网日期，不代表论文的发表时间）