JEBAHI, Mohamed; DAU, Frederic; IORDANOFF, Ivan; GUIN, Jean-Pierre

doi:10.1002/nme.5589

Métadonnées

Afficher la notice complète

Licence d’utilisation du document

Langue

Article de revue

Ce document a été publié dans

International Journal for Numerical Methods in Engineering. 2017, vol. 112, n° 13, p. 1909-1925

Wiley

Résumé en anglais

The discrete element method (DEM) presents an alternative way to model complex mechanical problems of silica glass, such as brittle fracture. Since discontinuities are naturally considered by DEM, no complex transition procedure from continuum phase to discontinuum one is required. However, to ensure that DEM can properly reproduce the silica glass cracking mechanisms, it is necessary to correctly model the different features characterizing its mechanical behavior before fracture. Particularly, it is necessary to correctly model the densification process of this material, which is known to strongly influence the fracture mechanisms. The present paper proposes a new and very promising way to model such process, which is assumed to occur only under hydrostatic pressure. An accurate predictive-corrective densification model is developed. This model shows a great flexibility to reproduce extremely complex densification features. Furthermore, it involves only one calibration parameter, which makes it very easy to apply. This new model represents a major step towards accurate modeling of materials permanent deformation with the discrete element method, which has long been a huge challenge in applying this method for continuum problems.< Réduire

Mots clés en anglais

Discrete element method

Cohesive beam bond

Silica glass

Densification

Nonlinear behavior

URI

https://oskar-bordeaux.fr/handle/20.500.12278/77174

DOI

http://dx.doi.org/10.1002/nme.5589

Project ANR

Comportement Mécanique des verres sous choc produit par laser, une approche expérimentale et numérique multi échelles. - ANR-14-CE07-0020

Origine

Importé de hal

Unités de recherche

Institut de Mécanique et d’Ingénierie de Bordeaux (I2M) - UMR 5295