Interaction of a piezoelectric screw dislocation with a blunt mode III crack in a piezoelectric material

被引：4
|
作者：
Song, Hao-Peng [1 ]
Gao, Cun-Fa [1 ]
机构：
[1] Nanjing Univ Aeronaut & Astronaut, State Key Lab Mech & Control Mech Struct, Nanjing 210016, Jiangsu, Peoples R China
来源：
ENGINEERING FRACTURE MECHANICS | 2012年 / 96卷
基金：
中国国家自然科学基金; 中国博士后科学基金;
关键词：
Piezoelectric screw dislocation; Blunt crack; Electric field strength; Image force; Dislocation emission; ENERGY-RELEASE RATE; FRACTURE-MECHANICS; FORCE; TIP; BEHAVIOR; HOLE;
D O I：
10.1016/j.engfracmech.2012.09.018
中图分类号：
O3 [力学];
学科分类号：
08 ; 0801 ;
摘要：
The problem of a piezoelectric screw dislocation emitted from a blunt crack is dealt with in this paper. For an arbitrary distribution of the residual dislocation, the series-form solutions are derived. The results show that the electric field strength inside the crack is in direct proportion to the jump value of electric potential, but independent of the jump value of displacement. The force acting on the dislocation decreases with the value of the dielectric constant within the crack increasing. And the increase of the dielectric constant within the crack helps dislocation emission effectively. (C) 2012 Elsevier Ltd. All rights reserved.
引用
收藏
页码：687 / 700
页数：14
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