Screw dislocations near a subsurface crack in a thin plate

被引：2
|
作者：
Wang, SD
Lee, S [1 ]
机构：
[1] Natl Tsing Hua Univ, Dept Mat Sci, Hsinchu, Taiwan
[2] Chung Chou Jr Coll Technol & Commerce, Dept Mech Engn, Chang Hua, Taiwan
来源：
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING | 1998年 / 246卷 / 1-2期
关键词：
screw dislocation; subsurface crack; thin plate;
D O I：
10.1016/S0921-5093(97)00743-0
中图分类号：
TB3 [工程材料学];
学科分类号：
0805 ; 080502 ;
摘要：
A screw dislocation near a subsurface crack parallel to both free surfaces in a thin plate was investigated. Based on the Schwarz-Christoffel transformation, the system was mapped to that of a screw dislocation near a free surface. The stress field, stress intensity factor, image force and strain energy were derived. The stress contours were plotted to show the validity of the solution. For a given distance between the first free surface and crack surface, the effect of layer thickness between the crack surface and the second free surface on stress intensity factor, image force and strain energy was studied. This solution can be reduced to the case of a screw dislocation near a subsurface crack in a semi-infinite medium. (C) 1998 Elsevier Science S.A. All rights reserved.
引用
收藏
页码：61 / 68
页数：8
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