J. Phys. IV France
Volume 105, March 2003
Page(s) 329 - 336

J. Phys. IV France
105 (2003) 329
DOI: 10.1051/jp4:20030204

An alternative 3D model for damage induced anisotropy and unilateral effect in microcracked materials

H. Welemane and F. Cormery

Laboratoire de Mécanique de Lille, URA 1441 du CNRS, Cité Scientifique, 59655 Villeneuve-d'Ascq cedex, France

A three-dimensional model of damage by microcrack growth is proposed to account for the mechanical behavior of quasi-brittle materials (especially for concrete and rocks). The emphasis is put on the induced anisotropy and on the elastic moduli dependence on the opening and closure of microcracks (unilateral effect). This formulation is based first on a damage characterization through the microcrack density distribution, and secondly avoids the use of spectral decompositions generally adopted in literature and which induce some major inconsistencies.

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