Finite element analysis of mechanical stability of coarsened nanoporous gold

作者：Cho Hoon Hwe; Chen Wiegart Yu chen Karen; Dunand David C

来源：Scripta Materialia, 2016, 115: 96-99.

DOI：10.1016/j.scriptamat.2016.01.011

• Coarsened nanoporous gold
• Mechanical stability
• Finite element (FE) analysis
• Volume fraction
• Surface characteristics

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.

• 出版日期2016-4-1
• 单位西北大学