Skeletonization, Geometrical Analysis, and Finite Element Modeling of Nanoporous Gold Based on 3D Tomography Data

摘要: Various modeling approaches simplify and parametrize the complex network structure of nanoporous gold (NPG) for studying structure–property relationship based on artificially generated structures. This paper presents a computational efficient versatile finite element method (FEM) beam model that is skeletonization diameter information derived from original 3D focused ion beam-scanning electron microscope (FIB-SEM) tomography data NPG. The geometrical skeleton thoroughly examined better understanding NPG structure. A FEM can predict macroscopic mechanical behavior material. Comparisons between response this solid are conducted. Results showed biggest-sphere algorithm implemented in open-source software FIJI, commonly used analysis microstructural data, overestimates curved ligaments. larger diameters lead to significant overestimation stiffness strength by model. For parabolic shaped ligament with only 20% variation its diameter, factor more than two was found stiffness. It concluded improved algorithms image processing needed provide accurate along axis.