- Title
- Automatic micro-scale modelling and evaluation of effective properties of highly porous ceramic matrix materials using the scaled boundary finite element method
- Creator
- Tian, Xinran; Birk, Carolin; Du, Chengbin; Ooi, Ean Tat
- Date
- 2024
- Type
- Text; Journal article
- Identifier
- http://researchonline.federation.edu.au/vital/access/HandleResolver/1959.17/200984
- Identifier
- vital:19473
- Identifier
-
https://doi.org/10.1016/j.cma.2023.116596
- Identifier
- ISSN:0045-7825 (ISSN)
- Abstract
- This paper presents an approach to the numerical estimation of effective properties of highly porous materials based on the scaled boundary finite element method (SBFEM). The latter can be formulated on quadtree meshes with hanging nodes and thus facilitates the efficient mesh generation and analysis of a large number of randomly created samples. To generate the corresponding Representative Volume Elements (RVEs), an improved Random Sequential Addition (RSA) method with overlap is used. Moreover, an alternative image-based digital matrix method for generating random assemblies of circular particles of the same size is proposed. In addition, a modified smoothing algorithm to treat the staircase boundaries present in a quadtree mesh is developed in order to accurately and efficiently capture the sinter-neck features of overlapping circular particles. The proposed image-based mesh generation and analysis procedure is used to evaluate the relationship between microstructural parameters and effective Young's modulus considering a large number of samples. In this context, a new dimensionless morphological parameter Nfc is proposed. The latter represents the morphology and connectivity of voids and is shown to be a useful indicator with respect to the effective elastic properties of highly porous ceramic matrix material. © 2023 Elsevier B.V.
- Publisher
- Elsevier B.V.
- Relation
- Computer Methods in Applied Mechanics and Engineering Vol. 419, no. (2024), p.
- Rights
- All metadata describing materials held in, or linked to, the repository is freely available under a CC0 licence
- Rights
- http://creativecommons.org/licenses/by-nc-nd/4.0/
- Rights
- Copyright © 2023 Elsevier B.V.
- Rights
- Open Access
- Subject
- 40 Engineering; 49 Mathematical sciences; Ceramic matrix; Effective properties; Image-based modelling; Porous media; Scaled boundary finite element method
- Full Text
- Reviewed
- Funder
- The first author gratefully acknowledges support for this research from the Fundamental Research Funds for the Central Universities, China (Grant No. 2017B662X14 ) and the National Natural Science Foundation of China (Grant No. 11372098 ).
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