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Head-on impact of metal microparticles: Aggregation or separation?

文献类型：期刊论文

作者Hu, Jianqiao2,3; Liu, Xiaoming2,3; Wei, Yueguang1; Wei,Yueguang; Liu XM(刘小明); Liu XM(刘小明)
刊名INTERNATIONAL JOURNAL OF IMPACT ENGINEERING
出版日期2023
卷号171页码:10
关键词Particle collision Critical impact velocity Molecular dynamics Plasticity and adhesion
ISSN号0734-743X
DOI10.1016/j.ijimpeng.2022.104388
通讯作者Liu, Xiaoming(xiaomingliu@imech.ac.cn)
英文摘要During the head-on particle collision, the adhesion plays a more important role as theparticle size decreases to micro size; the increasing surface effect makes the particle prefer to aggregate. While on the other hand, as the impact velocity increases, particles prefer to separate because of the larger elastic repulsive interaction. Another factor, which cannot be ignored during the impact of metal microparticles, is the dislocation plasticity which shows the rate and size effect. In this work, taking nano-plasticity behavior into account, our molecular simu-lations revealed two critical impact velocities for the transition of particle collision from separation to aggre-gation, and these two velocities are quantified by the analytical models proposed in this study. The low critical velocity for particle aggregation is dominated by adhesion, while in contrast, the high critical velocity for ag-gregation is dominated by dislocation plasticity, where the dislocation density in the particle after the collision is proportional to the impact velocity. With these findings, an analytical model was proposed to determine the critical particle size, below which no separation will be found whatever the impact velocity is. And this critical size is proportional to the ratio of surface energy to stacking fault energy.
WOS关键词DISLOCATION NUCLEATION ; PARTICLE ; COLLISION ; ADHESIVE ; VELOCITY ; RESTITUTION ; SURFACE ; MODEL
资助项目National Natural Science Foundation of China[12172358] ; National Natural Science Foundation of China[12022210] ; National Natural Science Foundation of China[12032001] ; Youth Innovation Promotion Association CAS[2018022] ; National Natural Science Foundation of China, Basic Science Center Program for Multi-scale Problems in Nonlinear Mechanics[11988102]
WOS研究方向Engineering ; Mechanics
语种英语
WOS记录号WOS:000860928700005
资助机构National Natural Science Foundation of China ; Youth Innovation Promotion Association CAS ; National Natural Science Foundation of China, Basic Science Center Program for Multi-scale Problems in Nonlinear Mechanics
源URL[http://dspace.imech.ac.cn/handle/311007/90349]  
专题力学研究所_非线性力学国家重点实验室
通讯作者Liu, Xiaoming; Liu XM(刘小明)
作者单位1.Peking Univ, Coll Engn, Dept Mech & Engn Sci, Beijing 100871, Peoples R China
2.Univ Chinese Acad Sci, Sch Engn Sci, Beijing 100049, Peoples R China
3.Chinese Acad Sci, Inst Mech, LNM, Beijing 100190, Peoples R China
推荐引用方式
GB/T 7714		 Hu, Jianqiao,Liu, Xiaoming,Wei, Yueguang,et al. Head-on impact of metal microparticles: Aggregation or separation?[J]. INTERNATIONAL JOURNAL OF IMPACT ENGINEERING,2023,171:10.
APA Hu, Jianqiao,Liu, Xiaoming,Wei, Yueguang,Wei,Yueguang,刘小明,&Liu XM.(2023).Head-on impact of metal microparticles: Aggregation or separation?.INTERNATIONAL JOURNAL OF IMPACT ENGINEERING,171,10.
MLA Hu, Jianqiao,et al."Head-on impact of metal microparticles: Aggregation or separation?".INTERNATIONAL JOURNAL OF IMPACT ENGINEERING 171(2023):10.

入库方式： OAI收割

来源：力学研究所

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