Scaling laws and mechanical properties of nanoporous copper

作     者：Lin-kai Guo Lei Wang Dong-hui Yang 

作者机构：College of Mechanics and MaterialsHohai UniversityNanjing 210098JiangsuChina 

出 版 物：《Journal of Iron and Steel Research International》 (J. Iron Steel Res. Int.)

年 卷 期：2017年第24卷第10期

页      面：1041-1047页

核心收录：

学科分类：081704[工学-应用化学] 07[理学] 070205[理学-凝聚态物理] 08[工学] 0817[工学-化学工程与技术] 080501[工学-材料物理与化学] 0805[工学-材料科学与工程（可授工学、理学学位）] 0703[理学-化学] 070301[理学-无机化学] 0702[理学-物理学] 

基　　金：supported by the National Natural Science Foundation of China(11472098) the Program for New Century Excellent Talents in University of China(NCET-13-0773) the Natural Science Foundation of Jiangsu Province of China(BK20171437) 

主　　题：Nanoporous copper Mechanical property Molecular dynamics Scaling lawSize effect 

摘      要：Through molecular dynamics simulations,the mechanical behavior of nanoporous copper under impact loading was investigated with relative densities ranging from 77.91% to 98.36%,focusing on deformation mechanism,the scaling laws and influence of ligament *** show that the classical Gibson-Ashby′s scaling laws should be modified for prediction of both the Young′s modulus and yield stress.A proportional relationship is established between cell wall thickness and yield stress,and new modified scaling equations are built for nanoporous copper with consideration on both relative mass density and size effects of *** size effect can be explained by larger surface area/volume ratio of samples with thinner ligament size and limited dislocation source activation due to narrow space between larger numbers of voids.