A modular damage model for quasi-brittle solids-interaction between initial and induced anisotropy. (English) Zbl 1084.74543

Halm, D.; Dragon, A.; Charles, Y.

Arch. Appl. Mech. 72, No. 6-7, 498-510 (2002).

Summary: This paper proposes a three-dimensional thermodynamically controlled damage model for a wide class of quasi-brittle materials, the modelling strategy being a continuation of the earlier work. The purpose is to keep an existing modular structure and to introduce new features to its framework. These are: (i) a thrifty insertion of initial orthotropy, (ii) the absence of irreversible strain after loading/unloading cycles (in opposition to rock-like materials described by the initial model) and especially (iii) the competition between initial orthotropy and anisotropy induced by mesocrack growth. The proposed innovation consists in adding second-order fabric tensors in conjunction with a damage tensor in the expression of the thermodynamic potential. Experimental data for a test composite material are simulated by this approach.

MSC:

74R05	Brittle damage
74E10	Anisotropy in solid mechanics

Keywords:

second-order fabric tensors; damage tensor; thermodynamic potential