Propagation of shockwave in nanocrystalline copper: Molecular dynamics simulation

被引：10

作者：

Chen Kai-Guo ^{[1
]}

Zhu Wen-Jun ^{[1
,3
]}

Ma Wen ^{[1
,2
]}

Deng Xiao-Liang ^{[1
]}

He Hong-Liang ^{[1
,3
]}

Jing Fu-Qian ^{[1
,2
,3
]}

机构：

[1] China Acad Engn Phys, Inst Fluid Phys, Natl Key Lab Shock Wave & Detonat Phys, Mianyang 621900, Peoples R China

[2] Natl Univ Def Technol, Dept Phys, Changsha 410073, Hunan, Peoples R China

[3] Sichuan Univ, Sch Phys Sci & Technol, Chengdu 610064, Peoples R China

来源：

ACTA PHYSICA SINICA | 2010年 / 59卷 / 02期

关键词：

molecular dynamics; nanocystalline copper; shockwave; plasticity; GRAIN-BOUNDARIES; NANOPHASE NI; DEFORMATION; BEHAVIOR; COMPRESSION; STRENGTH; METALS; CU;

D O I：

10.7498/aps.59.1225

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

The propagation of shockwave in nanocrystalline copper has been studied by means of molecular dynamics simulation. The samples are prepared by Voronoi method and crystalline orientations of each grain are limited by three conditions. The result shows for the first time that nanocrystalline copper shows the phenomenon of multi-yield under shock loading, and the shockwave has a multi-wave structure. The profiles of shock-front suggest grain boundary sliding and dislocation emmision in sequence. The shock-front consists of an elastically deforming area, a plastically deforming area dominated by grain boundary sliding and a plastically deforming area dominated by dislocation movement. There are irregularities on both elastic wave and plastic wave, and the former is obvious than the latter.

引用

页码：1225 / 1232

页数：8

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