信阳师范学院学报（自然科学版）Issue(1)：31-37,7.DOI:10.3969/j.issn.1003-0972.2016.01.008
分子动力学模拟α-Fe拉伸与疲劳裂纹扩展机理
Molecular Dynamics Simulation for Crack Propagation of α-Fe under Uniaxial Tension and Fatigue Loading
摘要
Abstract
The mechanical behaviors around a crack tip for α‐Fe with (010)[001] or (0‐11)[100] centered pre‐crack defect under uniaxial tensile and fatigue loading was studied using molecular dynamics simulation method .The results showed that the dislocation and stacking fault are produced during the loadprocess .Under uniaxial tensile ,the (010)[001] crack blunts and propagates along the{110} slip plane ,and the (0‐11)[100] crack emits the dislocations in the (011) plane at crack tip ,then the crack has a cleavage grow th in the (110) plane .Under cyclic loading ,the (010)[001] crack grows zigzagged along the{110} slip plane ,for the (0‐11) [100] crack modle ,it propagates quikly in (110) plane which has alomost the same failure way under tensile loading .This work also indicates that surface energy of plane (110) is lowest ,and the (110) plane is favourable for cleavage .关键词
分子动力学/中心裂纹/α-Fe/拉伸/疲劳Key words
molecular dynamics simulation/central crack/α-Fe/tension/fatigue分类
数理科学引用本文复制引用
袁玉全,曾祥国,胡燕飞..分子动力学模拟α-Fe拉伸与疲劳裂纹扩展机理[J].信阳师范学院学报（自然科学版）,2016,(1):31-37,7.基金项目
国防基础科学研究项目（B15201320131）；四川理工学院培育项目（2015RC41；2015RC44）；四川省教育厅科研项目 （）
