Microscopic study of mode I crack tip deformation

作     者：DeshunFan CaifuQian ZhongjunJiang 

作者机构：CollegeofMechanicalandElectricalEngineeringBeijingUniversityofChemicalTechnologyBeijing100029China 

出 版 物：《Journal of University of Science and Technology Beijing》 (北京科技大学学报（英文版）)

年 卷 期：2005年第12卷第1期

页      面：67-71页

核心收录：

学科分类：08[工学] 0805[工学-材料科学与工程（可授工学、理学学位）] 080502[工学-材料学] 

基　　金：ThisworkisfinanciallysupportedbytheNationalNaturalScienceFoundationofChina(GrantNo.10272020) 

主　　题：dislocation emission mode I crack plastic zone stress intensity factor 

摘      要：By simulating edge dislocation emissions from a mode I crack tip along multiple inclined slip planes, the plastic zone and dislocation-free zone around the crack tip are obtained. It is found that the shape of the mode I plastic zone consists of two leaning forward loops which is better agreement with experimental observations. Except at the crack tip there are also stress peaks in front of the crack tip. A formula of the maximum peak stress as a function of the applied stress intensity factor and the friction stress has been regressed.