文献类型：期刊文献

英文题名：Contour integral computations for multi-component material systems subjected to creep

作者：Chen, Jian-Jun[1]; Tu, Shan-Tung[1]; Xuan, Fu-Zhen[1]; Wang, Zheng-Dong[1]

机构：[1]E China Univ Sci & Technol, Sch Mech & Power Engn, Shanghai 200237, Peoples R China

年份：2006

卷号：236

期号：13

起止页码：1344

外文期刊名：NUCLEAR ENGINEERING AND DESIGN

收录：;EI(收录号：20063510086185);WOS:【SCI-EXPANDED(收录号:WOS:000238230700002)】；

语种：英文

外文关键词：Brittle fracture - Computation theory - Contour measurement - Cracks - Creep - Machine components - Matrix algebra - Microstructure - Number theory - Numerical analysis - Parameter estimation

摘要：In the present paper the crack behavior of multi-component material systems is investigated under extensive creep condition. The validation of the creep fracture parameters C* and C(t) is firstly examined at the microscale level. It is found that the C* value is no longer path-independent when mismatch inclusions are embedded into the matrix. To characterize the crack fields in inhomogeneous material the integral value defined at the crack tip as C*(tip) is introduced to reflect the influence of the inclusion. The interaction effects between microcrack and inclusion are systematically calculated with respect to different mismatch factors, various inclusion locations and inclusion numbers. The analysis results show that the C*(tip) value is not only influenced by the inclusion properties but also depends on the microstructure near the crack tip. (c) 2006 Elsevier B.V. All rights reserved.