The shielding effects of a screw dislocation near an elliptically blunted crack tip

被引：18
作者：
Li, Tianlei
Li, Zhonghua
Sun, Jun
机构：
[1] Shanghai Jiao Tong Univ, Dept Mech Engn, Sch Naval Architecture Ocean & Civil Engn, Shanghai 200240, Peoples R China
[2] Xian Jiaotong Univ, Sch Mat Sci & Engn, State Key Lab Mech Behav Mat, Xian 710049, Peoples R China
来源：
SCRIPTA MATERIALIA | 2006年 / 55卷 / 08期
基金：
中国国家自然科学基金;
关键词：
blunt crack; mode III crack; screw dislocation; shielding effect;
D O I：
10.1016/j.scriptamat.2006.06.028
中图分类号：
TB3 [工程材料学];
学科分类号：
0805 ; 080502 ;
摘要：
An explicit solution for describing the shielding effects arising from a screw dislocation near an elliptically blunted crack is presented. This is a general solution which may degenerate to the solutions of a finite crack and an infinite crack, and may apply for a dislocation either emitted from the crack surface or originating elsewhere and for a dislocation located anywhere around the crack tip. Based on the solution, the effects of the morphology of the blunt crack and the position of the dislocation on the shielding are examined. (c) 2006 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.
引用
收藏
页码：703 / 706
页数：4
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