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Influence of surface energy and thermal effects on cavitation instabilities in metallic glasses
Huang X(黄鑫)1; Ling Z(凌中)2; Dai LH(戴兰宏)2,3
Corresponding AuthorDai, L. H.(lhdai@lnm.imech.ac.cn)
Source PublicationMECHANICS OF MATERIALS
2019-04-01
Volume131Pages:113-120
ISSN0167-6636
AbstractTo reveal the void dominated fracture mechanism, cavitation instabilities in metallic glasses are studied through analytical and numerical approaches, with particular attention on surface energy and thermal effects. The critical pressure for unbounded growth of voids is determined, which increases apparently as surface energy is taken into account. A dimensionless number I-gamma which is a ratio of the energy required to form new void surface and the energy dissipated by plastic deformation is proposed. It is found that the surface energy significantly impedes void growth at the early stage of void growth when l(gamma) is large. Besides, to address the thermal effects, another dimensionless number I-th which reflects the competition of momentum diffusion and thermal diffusion, is presented. Results of numerical simulations show that the thermal effects first promote and finally impede the void growth at the late stage of void growth when I-th <= 1. Further study on combined influence of inertia, surface energy and thermal effects reveals the factors which are dominant as the process develops.
KeywordCavitation instabilities Metallic glasses Surface energy Thermal effects
DOI10.1016/j.mechmat.2019.01.019
Indexed BySCI ; EI
Language英语
WOS IDWOS:000464480100012
WOS KeywordSHEAR BANDING INSTABILITY ; DYNAMIC GROWTH ; ORIGIN ; SENSITIVITY ; RANGE
WOS Research AreaMaterials Science ; Mechanics
WOS SubjectMaterials Science, Multidisciplinary ; Mechanics
Funding ProjectNational Key Research and Development Program of China[2017YFB0702003] ; NSFC[11772313] ; NSFC[11402245] ; NSFC[11272328] ; NSFC[11790292] ; NSFC[11472287] ; Strategic Priority Research Program of the Chinese Academy of Sciences[XDB22040302] ; Strategic Priority Research Program of the Chinese Academy of Sciences[XDB22040303] ; Key Research Program of Frontier Sciences of the Chinese Academy of Sciences[QYZDJSSW-JSC011] ; key subject Computational Solid Mechanics of the China Academy of Engineering Physics
Funding OrganizationNational Key Research and Development Program of China ; NSFC ; Strategic Priority Research Program of the Chinese Academy of Sciences ; Key Research Program of Frontier Sciences of the Chinese Academy of Sciences ; key subject Computational Solid Mechanics of the China Academy of Engineering Physics
Classification二类/Q1
Ranking1
ContributorDai, L. H.
Citation statistics
Cited Times:1[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://dspace.imech.ac.cn/handle/311007/78753
Collection非线性力学国家重点实验室
Affiliation1.China Acad Engn Phys, Inst Syst Engn, Mianyang 621999, Sichuan, Peoples R China;
2.Chinese Acad Sci, Inst Mech, State Key Lab Nonlinear Mech, Beijing 100190, Peoples R China;
3.Univ Chinese Acad Sci, Sch Engn Sci, Beijing 101408, Peoples R China
Recommended Citation
GB/T 7714
Huang X,Ling Z,Dai LH. Influence of surface energy and thermal effects on cavitation instabilities in metallic glasses[J]. MECHANICS OF MATERIALS,2019,131:113-120.
APA 黄鑫,凌中,&戴兰宏.(2019).Influence of surface energy and thermal effects on cavitation instabilities in metallic glasses.MECHANICS OF MATERIALS,131,113-120.
MLA 黄鑫,et al."Influence of surface energy and thermal effects on cavitation instabilities in metallic glasses".MECHANICS OF MATERIALS 131(2019):113-120.
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