IMECH-IR  > 力学所知识产出(1956-2008)
Molecular dynamics simulation of interaction of a dislocation array from a crack tip with grain boundaries
Zhang YW(张永伟); Wang ZQ(王自强); Zhang, YW (reprint author), CHINESE ACAD SCI,INST MECH,LNM,BEIJING 100080,PEOPLES R CHINA.
Source PublicationModelling and Simulation in Materials Science and Engineering
1996
Volume4Issue:2Pages:231-244
ISSN0965-0393
AbstractThe interaction of a dislocation array emitted from a crack tip under mode II loading with asymmetric tilt grain boundaries (GBs) is analysed by the molecular dynamics method. The GBs can generally be described by planar and linear matching zones and unmatching zones. All GBs are observed to emit dislocations. The GBs migrated easily due to their planar and linear matching structure and asymmetrical type. The diffusion induced by stress concentration is found to promote the GB migration. The transmissions of dislocations are either along the matched plane or along another plane depending on tilt angle theta. Alternate processes of stress concentration and stress relaxation take place ahead of the pileup. The stress concentration can be released either by transmission of dislocations, by atom diffusion along GBs, or by migration of GBs by formation of twinning bands. The simulated results also unequivocally demonstrate two processes, i.e. asymmetrical GBs evolving into symmetrical ones and unmatching zones evolving into matching ones during the loading process.
KeywordBrittle-ductile Transition Computer-simulation Tilt Boundaries Deformation Fracture Metals Model Dissociation Migration
DOI10.1088/0965-0393/4/2/009
Indexed BySCI
Language英语
WOS IDWOS:A1996UM92100009
WOS KeywordBRITTLE-DUCTILE TRANSITION ; COMPUTER-SIMULATION ; TILT BOUNDARIES ; DEFORMATION ; FRACTURE ; METALS ; MODEL ; DISSOCIATION ; MIGRATION
WOS Research AreaMaterials Science ; Physics
WOS SubjectMaterials Science, Multidisciplinary ; Physics, Applied
Citation statistics
Cited Times:17[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://dspace.imech.ac.cn/handle/311007/39136
Collection力学所知识产出(1956-2008)
Corresponding AuthorZhang, YW (reprint author), CHINESE ACAD SCI,INST MECH,LNM,BEIJING 100080,PEOPLES R CHINA.
Recommended Citation
GB/T 7714
Zhang YW,Wang ZQ,Zhang, YW . Molecular dynamics simulation of interaction of a dislocation array from a crack tip with grain boundaries[J]. Modelling and Simulation in Materials Science and Engineering,1996,4,2,:231-244.
APA 张永伟,王自强,&Zhang, YW .(1996).Molecular dynamics simulation of interaction of a dislocation array from a crack tip with grain boundaries.Modelling and Simulation in Materials Science and Engineering,4(2),231-244.
MLA 张永伟,et al."Molecular dynamics simulation of interaction of a dislocation array from a crack tip with grain boundaries".Modelling and Simulation in Materials Science and Engineering 4.2(1996):231-244.
Files in This Item: Download All
File Name/Size DocType Version Access License
A084.pdf(385KB) 开放获取--View Download
Related Services
Recommend this item
Bookmark
Usage statistics
Export to Endnote
Lanfanshu
Similar articles in Lanfanshu
[张永伟]'s Articles
[王自强]'s Articles
[Zhang, YW (reprint author), CHINESE ACAD SCI,INST MECH,LNM,BEIJING 100080,PEOPLES R CHINA.]'s Articles
Baidu academic
Similar articles in Baidu academic
[张永伟]'s Articles
[王自强]'s Articles
[Zhang, YW (reprint author), CHINESE ACAD SCI,INST MECH,LNM,BEIJING 100080,PEOPLES R CHINA.]'s Articles
Bing Scholar
Similar articles in Bing Scholar
[张永伟]'s Articles
[王自强]'s Articles
[Zhang, YW (reprint author), CHINESE ACAD SCI,INST MECH,LNM,BEIJING 100080,PEOPLES R CHINA.]'s Articles
Terms of Use
No data!
Social Bookmark/Share
File name: A084.pdf
Format: Adobe PDF
This file does not support browsing at this time
All comments (0)
No comment.
 

Items in the repository are protected by copyright, with all rights reserved, unless otherwise indicated.