1. Some Remarks on the Damage Unilateral Effect Modelling for Microcracked Materials
- Author
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Fabrice Cormery, Hélène Welemane, Laboratoire de Mécanique de Lille - FRE 3723 (LML), Université de Lille, Sciences et Technologies-Centrale Lille-Centre National de la Recherche Scientifique (CNRS), Université des Sciences et Technologies de Lille - USTL (FRANCE), and Université de Lille, Sciences et Technologies-Ecole Centrale de Lille-Université de Lille-Centre National de la Recherche Scientifique (CNRS)
- Subjects
Unilateral effect ,Materials science ,Computational Mechanics ,02 engineering and technology ,Damage activation deactivation ,Brittleness ,0203 mechanical engineering ,General Materials Science ,Composite material ,Anisotropy ,Elastic modulus ,Stiffness matrix ,Mechanical Engineering ,Microcracks ,Brittle materials ,Mechanics ,021001 nanoscience & nanotechnology ,Symmetry (physics) ,Microcracks opening closure ,Damage ,020303 mechanical engineering & transports ,Mechanics of Materials ,damage • brittle materials • microcracks • unilateral effect • micro-cracks opening–closure • damage activation–deactivation • elastic moduli recovery • anisotropy • stress–strain response continuity ,Mécanique des matériaux ,Elastic moduli recovery ,Stress strain response continuity ,0210 nano-technology - Abstract
This study deals with the macroscopic modelling of the mechanical behaviour of microcracked materials and particularly with the unilateral aspect of such damage which leads, at the closure of microcracks, to a partial damage deactivation. By means of a micromechanical analysis, the aim of this article is first to point out the influence of the opening–closure of microdefects on the effective elastic properties of a microcracked medium. According to these considerations,a new elastic moduli recovery condition at damage deactivation is proposed. The introduction of this condition within the anisotropic damage model proposed by Halm and Dragon, 1996 allows its micromechanical background to be extended while preserving its main advantages, in particular the continuity of the stress–strain response and the symmetry of the stiffness tensor.
- Published
- 2002
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