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Comment to "Skeletonization-based beam finite element models for stochastic bicontinuous materials: application to simulations of nanoporous gold" by C. Soyarslan et al. [J. Mater. Res. 33(20), 3371 (2018)]
Publikationstyp
Journal Article
Date Issued
2020-10-01
Sprache
English
Author(s)
Herausgeber*innen
Journal
Volume
35
Issue
20
Start Page
2831
End Page
2834
Citation
Journal of Materials Research 35 (20): 2831-2834 (2020)
Publisher DOI
Scopus ID
Publisher
Springer
Peer Reviewed
true
Soyarslan et al. [J. Mater. Res. 33(20), 3371 (2018)] proposed a beam-finite element model for the computation of effective elastic properties of nanoporous materials, where the ligament diameter along the skeleton is determined with the biggest sphere algorithm. Although this algorithm is often used in the literature, it is known that it systematically overestimates the diameter in network structures. Thus, the need for further stiffening of the junction zones as proposed by the authors is in contradiction to the literature. Furthermore, the factor 40 appears to be one order of magnitude too high. We show that the 3D microstructures generated from random Gaussian fields contain features that are violating the assumption of circular cross-sections and, therefore, cannot be captured by the biggest sphere algorithm. Consequently, the authors required an unphysically high value of 40 to compensate this hidden effect.
Subjects
elastic properties
microstructure
modeling
nanoporous metals
DDC Class
600: Technik
620: Ingenieurwissenschaften
Funding Organisations
More Funding Information
This work is funded by the Deutsche Forschungsgemeinschaft (DFG, German Research Foundation)–Projektnummer 192346071–SFB 986 Tailor-Made Multi-Scale Materials Systems: M3, project B4