A moving screw dislocation near interfacial rigid lines in two dissimilar anisotropic media  

作　　者：刘又文 李博 方棋洪 

机构地区：[1]College of Mechanics and Aerospace,Hunan University

出　　处：《Applied Mathematics and Mechanics(English Edition)》2008年第5期625-637,共13页应用数学和力学（英文版）

基　　金：the National Natural Science Foundation of China(No.10472030)

摘　　要：This paper attempts to investigate the problem for the interaction between a uniformly moving screw dislocation and interface rigid lines in two dissimilar.anisotropic. materials. Integrating Riemann-Schwarz＇s symmetry principle with the analysis singularity of complex functions, we present the general elastic solutions of this problem and the closed form solutions for interfaces containing one and two rigid lines. The expressions of stress intensity factors, at the rigid line tips and image force acting on moving dislocation are derived explicitly. The results show that dislocation velocity has an antishielding effect on the rigid line tip and a larger dislocation velocity leads to the equilibrium position of dislocation closing with the rigid line. The presented solutions contain previously known results as the special cases.This paper attempts to investigate the problem for the interaction between a uniformly moving screw dislocation and interface rigid lines in two dissimilar.anisotropic. materials. Integrating Riemann-Schwarz＇s symmetry principle with the analysis singularity of complex functions, we present the general elastic solutions of this problem and the closed form solutions for interfaces containing one and two rigid lines. The expressions of stress intensity factors, at the rigid line tips and image force acting on moving dislocation are derived explicitly. The results show that dislocation velocity has an antishielding effect on the rigid line tip and a larger dislocation velocity leads to the equilibrium position of dislocation closing with the rigid line. The presented solutions contain previously known results as the special cases.

关 键 词：anisotropic bimaterials moving screw dislocation interfacial rigid lines image force 

分 类 号：O343.7[理学—固体力学]