Criteria on the artificial compliance inherent to the intrinsic cohesive zone

Nawfal Blal (1) , Loïc Daridon (1) , Yann Monerie (2, 3) , Stéphane Pagano (1)

1 M3 - Modélisation Mathématique en Mécanique
2 MIST - Laboratoire de micromécanique et intégrité des structures
3 IRSN - Institut de Radioprotection et de Sûreté Nucléaire

This Note presents criteria on the artificial compliance due to intrinsic cohesive zone models. A homogenized model is proposed for a collection of cohesive zones embedded between each mesh of a finite element-type discretization (cohesive-volumetric approach). The overall elastic behavior of this cohesive-volumetric medium is obtained as a function of the local properties and the mesh size. For an isotropic discretization, a criterion on the cohesive stiffnesses is derived: the additional compliance inherent to intrinsic cohesive zone models is bounded by lower value.

Mots clés: damage; Cohesive Zone Model; Rigorous Criteria; Cohesive Stiffness; Homogenization

Domaines: Mécanique des solides [physics.class-ph]; Mécanique des solides [physics.class-ph]

Nawfal Blal, Loïc Daridon, Yann Monerie, Stéphane Pagano. Criteria on the artificial compliance inherent to the intrinsic cohesive zone. Comptes Rendus Mécanique, 2011, 339 (12), pp.789-795. ⟨10.1016/j.crme.2011.10.001⟩. ⟨hal-00672818⟩