ELASTIC BEHAVIOR OF DISLOCATION DIPOLES NEAR A BLUNT CRACK

NCUIR > Engineering College > Graduate Institute of Mechanical Engineering > journal & Dissertation > Item 987654321/27068

Please use this identifier to cite or link to this item: http://ir.lib.ncu.edu.tw/handle/987654321/27068

Title:	ELASTIC BEHAVIOR OF DISLOCATION DIPOLES NEAR A BLUNT CRACK
Authors:	YANG,YS;LEE,SL;LAN,BT
Contributors:	機械工程學系
Keywords:	PARALLEL SCREW DISLOCATIONS;SURFACE CRACK;FRACTURE;MECHANICS;DUCTILE
Date:	1995
Issue Date:	2010-06-29 18:06:55 (UTC+8)
Publisher:	中央大學
Abstract:	Using the conformal mapping method, the elastic interaction between a screw dislocation dipole and an interfacial crack emanating from a semi-elliptic hole is investigated. We have derived the complex potential and stress field. From the stress field, the stress intensity factor, crack extension force, strain energy, image force and image torque on the dipole are obtained. Besides the translation of the dipole caused by the image force on the dipole center, an image torque acting upon the dipole center is also crucial. Both the translation and rotation must be considered in the static equilibrium. The stress intensity factor at the crack tip is strongly influenced by both the dipole orientation and the angle of the dipole center. In addition, when the crack is blunt, the stress intensity factor at the crack tip is reduced.
Relation:	ENGINEERING FRACTURE MECHANICS
Appears in Collections:	[Graduate Institute of Mechanical Engineering] journal & Dissertation

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