A 2D micromechanical damage model for initially orthotropic materials
type de publication |
communication internationale avec actes publiés |
date de publication |
2004 |
auteur(s) |
Gruescu Ion-Cosmin; Kondo Djimédo; Shao Jian-Fu; Pensee Vincent |
| |
conférence |
9th International Symposium on Numerical Models in Geomechanics (NUMOG IX) |
dates |
de 25-08-2004 à 27-08-2004 |
lieu |
Ottawa, Canada |
nom des actes |
Numerical Models in Geomechanics |
| |
pages |
25 – 30 |
ISBN / ISSN |
978-0-203-02396-9 |
résumé |
The paper presents a micromechanical model of anisotropic damage in initially orthotropic materials. It extends previous results obtained for isotropic solids. It is shown that the effective free energy of an orthotropic materials containing distributed microcracks can be described in terms of the macroscopic stress, the distribution of the cracks density and of a structural tensor which accounts for the primary anisotropy. Moreover, the model
takes into account cracks closure phenomena which are expected to occur for some loading paths met in geomechanics. Finally, the ability of the model to describe the overall stress-strain response under off axis loading, as well as the loss of material symmetry, is demonstrated. |
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