Multi-Scale Random Sets: from Morphology to Effective Properties and to Fracture Statistics

Abstract : Complex microstructures in materials often involve multi-scale heterogeneous textures, modelled by random sets derived from Mathematical Morphology. Starting from 2D or 3D images, a complete morphological characterization by image analysis is performed, and used for the identification of a model of random structure. From morphological models, simulations of realistic microstructures are introduced in a numerical solver to compute appropriate fields (electric, elastic stress or strain, ...) and to estimate the effective properties by numerical homogenization, accounting for scale dependent statistical fluctuations of the fields. Our approach is illustrated by various examples of multi-scale models: Boolean random sets based on Cox point processes and various random grains (spheres, cylinders), showing a very low percolation threshold, and therefore a high conductivity or high elastic moduli for a low volume fraction of a second phase. Multiscale Cox point processes are also a source of instructive models of fracture statistics, such as multiscale weakest link models.
Type de document :
Communication dans un congrès
12th International Symposium on Continuum Models and Discrete Systems ((CMDS-12), Feb 2011, Kolkata, India. IOP, 319 (1), 12 p., 12013, 2011, 〈10.1088/1742-6596/319/1/012013〉
Liste complète des métadonnées

https://hal-mines-paristech.archives-ouvertes.fr/hal-00836679
Contributeur : Sylvie Lavigne <>
Soumis le : vendredi 21 juin 2013 - 13:24:10
Dernière modification le : mardi 12 septembre 2017 - 11:41:39

Identifiants

Collections

Citation

Dominique Jeulin. Multi-Scale Random Sets: from Morphology to Effective Properties and to Fracture Statistics. 12th International Symposium on Continuum Models and Discrete Systems ((CMDS-12), Feb 2011, Kolkata, India. IOP, 319 (1), 12 p., 12013, 2011, 〈10.1088/1742-6596/319/1/012013〉. 〈hal-00836679〉

Partager

Métriques

Consultations de la notice

50