Polimodal fracture in orthotropic viscoelastic media

Fissuration polymodale dans les matériaux viscoélastiques orthotropes

Rostand Moutou Pitti (1) , Frédéric Dubois (2)

1 LAMI - Laboratoire de Mécanique et Ingénieries
2 GEMH - Groupe d'Etudes des Matériaux Hétérogènes

This Note deals with an algorithmic approach about the crack initiation and the crack growth in a viscoelastic media for mixed mode configurations. This numerical model couples a finite element resolution of viscoelastic behavior and the Mθ integral calculus allowing a mixed mode separation in terms of stress intensity factors and energy release rate. The numerical application uses a 2MCG specimen allowing, in the same time, different mixed mode ratios and a crack growth stability. The finite element algorithm allows us to model the crack tip advance by taking into account the crack lip uncohesion in the process zone. It size is defined by taking into account stress field in the crack tip vicinity.

Mots clés: Rupture; Mixed modes; Path-independent integrals; Crack growth process

Mots clés: Propagation de fissure; Rupture, Modes mixtes, Intégrales indépendantes

Domaines: Chimie; Matériaux; Sciences de l'ingénieur [physics]; Matériaux

Rostand Moutou Pitti, Frédéric Dubois. Fissuration polymodale dans les matériaux viscoélastiques orthotropes. Comptes Rendus Mécanique, 2009, 337 (11-12), pp.748-754. ⟨10.1016/j.crme.2009.10.008⟩. ⟨hal-00639260⟩