Fracture of heterogeneous graded materials : from microstructure to structure

Frédéric Pérales (1) , S. Bourgeois (2) , André Chrysochoos (3) , Yann Monerie (1)

1 IRSN - Institut de Radioprotection et de Sûreté Nucléaire
2 LMA - Laboratoire de Mécanique et d'Acoustique [Marseille]
3 ThM2 - ThermoMécanique des Matériaux

This paper presents a new computational approach dedicated to the fracture of nonlinear heterogeneous materials. This approach extends the standard periodic homogenization problem to a two field cohesive-volumetric finite element scheme. This two field finite element formulation is written as a generalization Non-Smooth Contact Dynamics framework involving Frictional Cohesive Zone Models. The associated numerical platform allows to simulate, at finite strain, the fracture of nonlinear composites from crack initiation to post-fracture behavior. The ability of this computational approach is illustrated by the fracture of the hydrided Zircaloy under transient loading.

Mots clés: Zircaloy-4; Frictional cohesive zone model; Periodic homogenization; Dynamic fracture

Domaines: Matériaux et structures en mécanique [physics.class-ph]; Matériaux et structures en mécanique [physics.class-ph]

Frédéric Pérales, S. Bourgeois, André Chrysochoos, Yann Monerie. Fracture of heterogeneous graded materials : from microstructure to structure. 9th European Mechanics of Materials Conference- EMMC9, May 2006, Moret sur Loing, France. pp.441-445. ⟨hal-00572470⟩