Please use this identifier to cite or link to this item: https://doi.org/10.15480/882.1729
Fulltext available Open Access
Publisher DOI: 10.3390/met8040282
Title: Skeletonization, geometrical analysis, and finite element modeling of nanoporous gold based on 3D tomography data
Language: English
Authors: Richert, Claudia 
Huber, Norbert 
Keywords: nano-porous metal;mechanical behavior;3D structural modeling;skeletonization;3D FIB-SEM tomography
Issue Date: 19-Apr-2018
Publisher: MDPI
Source: Metals 4 (8): 282- (2018)
Journal or Series Name: Metals 
Abstract (english): Various modeling approaches simplify and parametrize the complex network structure of nanoporous gold (NPG) for studying the structure–property relationship based on artificially generated structures. This paper presents a computational efficient and versatile finite element method (FEM) beam model that is based on skeletonization and diameter information derived from the original 3D focused ion beam-scanning electron microscope (FIB-SEM) tomography data of NPG. The geometrical skeleton network is thoroughly examined for a better understanding of the NPG structure. A skeleton FEM beam model is derived that can predict the macroscopic mechanical behavior of the material. Comparisons between the mechanical response of this skeleton beam model and a solid FEM model are conducted. Results showed that the biggest-sphere diameter algorithm implemented in the open-source software FIJI, commonly used for geometrical analysis of microstructural data, overestimates the diameter of the curved NPG ligaments. The larger diameters lead to a significant overestimation of macroscopic stiffness and strength by the skeleton FEM beam model. For a parabolic shaped ligament with only 20% variation in its diameter, a factor of more than two was found in stiffness. It is concluded that improved algorithms for image processing are needed that provide accurate diameter information along the ligament axis.
URI: http://tubdok.tub.tuhh.de/handle/11420/1732
DOI: 10.15480/882.1729
ISSN: 2075-4701
Institute: Keramische Hochleistungswerkstoffe M-9 
Werkstoffphysik und -technologie M-22 
Type: (wissenschaftlicher) Artikel
Project: SFB 986, Teilproject B4 - Mikromechanisches Materialverhalten hierarchischer Werkstoffe 
License: In Copyright In Copyright
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