Damage decreases the mechanical characteristics of materials and also modifies their thermal properties. However these modifications can disappear when the microcracks are closed. Wepropose amodel of this phenomenon for the thermomechanical behavior of strongly anisotropic materials. The aim of this work is to adapt the concept of loading mode in Fracture Mechanics to Damage Mechanics and to include it explicitly in the equations. This allows to obtain a thermomechanical behavior respecting rigorously all the criterions, notably the continuity and the deactivation of each modulus that are necessary for the consistency of the modeling of the damage phenomenon. In particular, contrary to the other ways of modeling, it simulates the Poisson effect restoration and according to case studies does restore or does not restore the shear modulus without adding a friction law on the microcracks.
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