Head-on impact of metal microparticles: Aggregation or separation? | |
Hu JQ(胡剑桥)1,2; Liu XM(刘小明)1,2; Wei,Yueguang3 | |
发表期刊 | INTERNATIONAL JOURNAL OF IMPACT ENGINEERING |
2023 | |
卷号 | 171页码:10 |
ISSN | 0734-743X |
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. |
关键词 | Particle collision Critical impact velocity Molecular dynamics Plasticity and adhesion |
DOI | 10.1016/j.ijimpeng.2022.104388 |
收录类别 | SCI |
语种 | 英语 |
WOS记录号 | WOS:000860928700005 |
关键词[WOS] | DISLOCATION NUCLEATION ; PARTICLE ; COLLISION ; ADHESIVE ; VELOCITY ; RESTITUTION ; SURFACE ; MODEL |
WOS研究方向 | Engineering ; Mechanics |
WOS类目 | Engineering, Mechanical ; Mechanics |
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] |
项目资助者 | 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 |
论文分区 | 一类 |
力学所作者排名 | 1 |
RpAuthor | Liu, Xiaoming |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://dspace.imech.ac.cn/handle/311007/90350 |
专题 | 非线性力学国家重点实验室 |
通讯作者 | Liu XM(刘小明) |
作者单位 | 1.Chinese Acad Sci, Inst Mech, LNM, Beijing 100190, Peoples R China; 2.Univ Chinese Acad Sci, Sch Engn Sci, Beijing 100049, Peoples R China; 3.Peking Univ, Coll Engn, Dept Mech & Engn Sci, Beijing 100871, Peoples R China |
推荐引用方式 GB/T 7714 | Hu JQ,Liu XM,Wei,Yueguang. Head-on impact of metal microparticles: Aggregation or separation?[J]. INTERNATIONAL JOURNAL OF IMPACT ENGINEERING,2023,171:10. |
APA | Hu JQ,Liu XM,&Wei,Yueguang.(2023).Head-on impact of metal microparticles: Aggregation or separation?.INTERNATIONAL JOURNAL OF IMPACT ENGINEERING,171,10. |
MLA | Hu JQ,et al."Head-on impact of metal microparticles: Aggregation or separation?".INTERNATIONAL JOURNAL OF IMPACT ENGINEERING 171(2023):10. |
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Jp2023Fa137.pdf(3326KB) | 期刊论文 | 出版稿 | 开放获取 | CC BY-NC-SA | 浏览 请求全文 |
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