文献类型：期刊文献

英文题名：Three-dimensional finite element analyses of in-plane and out-of-plane creep crack-tip constraints for different specimen geometries

作者：Liu, S.[1]; Wang, G.Z.[1]; Xuan, F.Z.[1]; Tu, S.T.[1]

机构：[1] Key Laboratory of Pressure Systems and Safety, Ministry of Education, East China University of Science and Technology, Shanghai, 200237, China

年份：2015

卷号：133

起止页码：264

外文期刊名：Engineering Fracture Mechanics

收录：EI(收录号：20154401454303)

语种：英文

外文关键词：Crack propagation - Crack tips - Creep - Geometry

摘要：Based on extensive three-dimensional finite element analyses, the creep crack-tip constraints for three specimen geometries (C(T), SEN(T) and M(T)) were quantified by using three constraint parameters (namely R*, h and Tz) for 316H steel at 550°C and steady-state power law creep. The three parameters were comparatively analyzed with respect to their capabilities for characterizing in-plane and out-of-plane creep constraints as well as the interaction between them. The results show that the specimen geometries with higher constraint strengthen the out-of-plane creep constraint effect. The parameters R* and h can quantify in-plane creep constraint, but they are inadequate to characterize higher out-of-plane creep constraint. The Tz can adequately incorporate out-of-plane creep constraint effect. ? 2015 Elsevier Ltd.