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

【摘要】 <正>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 singular- ity 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 posi- tion of dislocation closing with the rigid line.The presented solutions contain previously known results as the special cases.更多还原

【Abstract】 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 singular- ity 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 posi- tion of dislocation closing with the rigid line.The presented solutions contain previously known results as the special cases.更多还原