Modeling the microstructure of a heterogeneous particle-based material with high-volume fraction

Afshar, G., Couture, A., Cuillière, J.-. et François, V. (2025). Modeling the microstructure of a heterogeneous particle-based material with high-volume fraction. Computational Mechanics . ISSN 1432-0924 DOI 10.1007/s00466-025-02636-y

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Résumé

Efficiently predicting the mechanical properties of particle-based heterogeneous materials in terms of both time and cost remains a significant research challenge. This paper introduces two distinct approaches to modify an existing method for the automatic generation of statistical volume elements (SVEs) based on multibody dynamics. These modifications aim at enhancing the accuracy of modeling SVEs with high particle volume fractions, particularly for complex particle shapes. By refining the SVE generation process, the two proposed approaches address challenges in particle positioning and meshing, ultimately contributing to more reliable predictions of materials macroscopic behavior. The first approach involves slightly adjusting the geometric parameters of particles to increase the number of particles that can be inserted and retained within the SVE. The second approach involves generating a larger domain with a target volume fraction, meshing the entire model of this larger domain, and subsequently cutting its mesh to achieve the SVE desired dimensions and to minimize boundary effects. Both approaches are applied to SVEs filled with spherical and cylindrical particles to achieve target volume fractions up to 30%. Results obtained with these two approaches are then compared to those obtained using the existing method. The findings indicate that the geometry correction approach effectively increases the volume fraction of SVEs containing spherical particles, while the mesh cutting approach successfully raises, to the target level, the volume fraction of SVEs containing even more complex elongated particles like cylindrical particles.

Type de document:	Article
Mots-clés libres:	Finite element analysis Multibody dynamics Representative volume element Statistical volume element Geometry correction method Mesh cutting method Particle-based composites Homogenization
Date de dépôt:	28 oct. 2025 14:32
Dernière modification:	28 oct. 2025 14:32
Version du document déposé:	Post-print (version corrigée et acceptée)
URI:	https://depot-e.uqtr.ca/id/eprint/12279

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