J. Phys. IV France
Volume 105, March 2003
Page(s) 313 - 320

J. Phys. IV France
105 (2003) 313
DOI: 10.1051/jp4:20030202

Damage model for quasi-brittle solids: Coupled effects of induced and initial anisotropy

D. Halm, A. Dragon and Y. Charles

Laboratoire de Mécanique et de Physique des Matériaux, UMR 6617 du CNRS, ENSMA, BP. 40109, 86961 Futuroscope cedex, France

A three-dimensional thenmodynamically controlled damage model for a wide class of quasi-brittle materials is proposed, extending earlier works. The features concerned are the insertion of initial orthotropy, a modification involving the absence of irreversible strain after loading/unloading cycles (in opposition to rock-like materials concerned with the initial model) and, especially, the competition between initial orthotropy and anisotropy induced by mesocrack growth. Finally, the frictional sliding at the interface fiber/matrix after debonding is briefly introduced for a class of ceramic composites.

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