Influence of surface energy and thermal effects on cavitation instabilities in metallic glasses

doi:10.1016/j.mechmat.2019.01.019

IMECH-IR > 非线性力学国家重点实验室

	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
通讯作者	Dai, L. H.(lhdai@lnm.imech.ac.cn)
发表期刊	MECHANICS OF MATERIALS
	2019-04-01
卷号	131 页码:113-120
ISSN	0167-6636
摘要	To 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.
关键词	Cavitation instabilities Metallic glasses Surface energy Thermal effects
DOI	10.1016/j.mechmat.2019.01.019
收录类别	SCI ; EI
语种	英语
WOS记录号	WOS:000464480100012
关键词[WOS]	SHEAR BANDING INSTABILITY ; DYNAMIC GROWTH ; ORIGIN ; SENSITIVITY ; RANGE
WOS研究方向	Materials Science ; Mechanics
WOS类目	Materials Science, Multidisciplinary ; Mechanics
资助项目	National 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
项目资助者	National 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
论文分区	二类/Q1
力学所作者排名	1
RpAuthor	Dai, L. H.
引用统计	被引频次：6[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://dspace.imech.ac.cn/handle/311007/78753
专题	非线性力学国家重点实验室
作者单位	1.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
推荐引用方式 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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