Finite element analysis of mechanical stability of coarsened nanoporous gold

被引：14
作者：
Cho, Hoon-Hwe [1 ]
Chen-Wiegart, Yu-chen Karen [2 ]
Dunand, David C. [1 ]
机构：
[1] Northwestern Univ, Dept Mat Sci & Engn, Evanston, IL 60208 USA
[2] Brookhaven Natl Lab, Natl Synchrotron Light Source 2, Upton, NY 11973 USA
来源：
SCRIPTA MATERIALIA | 2016年 / 115卷
关键词：
Coarsened nanoporous gold; Mechanical stability; Finite element (FE) analysis; Volume fraction; Surface characteristics; BEHAVIOR; FABRICATION;
D O I：
10.1016/j.scriptamat.2016.01.011
中图分类号：
TB3 [工程材料学];
学科分类号：
0805 ; 080502 ;
摘要：
The mechanical stability of nanoporous gold (np-Au) at various stages of thermal coarsening is studied via finite element analysis under volumetric compression using np-Au architectures imaged via X-ray nano-tomography. As the np-Au is coarsened thermally over ligament sizes ranging from 185 to 465 nm, the pore volume fraction is determinant for the mechanical stability of the coarsened np-Au, unlike the curvature and surface orientation of the ligaments. The computed Young's modulus and yield strength of the structures are compared with the Gibson-Ashby model. The geometry of the structures determines the locations where stress concentrations occur at the onset of yielding. (C) 2016 Elsevier Ltd. All rights reserved.
引用
收藏
页码：96 / 99
页数：4
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