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Interference effect on friction behavior of asperities on single crystal copper
Liu XM(刘小明); Zhang B; Wei YG(魏悦广); Liu, XM (reprint author), Chinese Acad Sci, Inst Mech, LNM, Beijing 100190, Peoples R China.
Source PublicationTribology International
2014-12
Volume81Issue:1Pages:169-178
ISSN0301-679X
AbstractBy using Green function molecular dynamics method, we systematically study the friction behavior of a single asperity and asperity array over the (1 1 1) surface of single crystal copper. We find that internal plastic behavior (burst of stacking faults, dislocation emission and propagation) is a promising reason for the higher value of static friction coefficient than that of dynamics friction in non-adhesive scratch. For the rough surface, however, the difference between static and dynamic friction coefficients disappear due to the interference between asperities. The interference dramatically increases the friction coefficient by introducing atomic scale plastic features (pile-up atoms, stacking faults, and U-shape dislocation loop). (C) 2014 Elsevier Ltd. All rights reserved.
KeywordFriction Transition Plastic Behavior Green Function Molecular Dynamics Asperity Interference
DOI10.1016/j.triboint.2014.08.007
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Indexed BySCI ; EI
Language英语
WOS IDWOS:000345469200018
WOS KeywordMOLECULAR-DYNAMICS SIMULATIONS ; ATOMIC-SCALE ; CONTACT ; ROUGHNESS ; NANOSCALE
WOS Research AreaEngineering
WOS SubjectEngineering, Mechanical
Funding OrganizationThis work was supported by National Basic Research Program of China through 2012CB937500, and by the National Natural Science Foundation of China (Grant no.11202214, no. 91216108, no. 11372131), by State Key Laboratory of Mechanics and Control of Mechanical Structures(NUAA Grant no. MCMS-0114G01). Insightful discussions about applying Green function method with Prof. M.H. Muser and Prof. L.T. Kong are gratefully acknowledged. Authors thank Prof. Yujie Wei for useful comments.
DepartmentLNM新型材料及结构的多尺度力学
Classification二类
Citation statistics
Cited Times:2[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://dspace.imech.ac.cn/handle/311007/49458
Collection非线性力学国家重点实验室
Corresponding AuthorLiu, XM (reprint author), Chinese Acad Sci, Inst Mech, LNM, Beijing 100190, Peoples R China.
Recommended Citation
GB/T 7714
Liu XM,Zhang B,Wei YG,et al. Interference effect on friction behavior of asperities on single crystal copper[J]. Tribology International,2014,81(1):169-178.
APA Liu XM,Zhang B,Wei YG,&Liu, XM .(2014).Interference effect on friction behavior of asperities on single crystal copper.Tribology International,81(1),169-178.
MLA Liu XM,et al."Interference effect on friction behavior of asperities on single crystal copper".Tribology International 81.1(2014):169-178.
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