1st European Mechanics of Materials Conference on Local Approach to Fracture '86 - 96'
J. Phys. IV France 06 (1996) C6-33-C6-42
Modelling Ductile Stable Crack Growth in a C-Mn Steel with Local ApproachesL. Bauvineau1, H. Burlet1, 2, C. Eripret3 and A. Pineau1
1 Centre des Matériaux, Ecole des Mines de Paris, URA 866 du CNRS, BP. 87, 91003 Evry, France
2 CEA, DEM/SGM, 17 rue des Martyrs, 38054 Grenoble cedex 9, France
3 EDF-MTC, Direction des Etudes et Recherches, Route de Sens, 77250 Moret-sur-Loing, France
JR-resistance curves obtained on a C-Mn steel with different specimens are compared. The experiments confirm a geometrical dependence of the fracture toughness. An attempt is made to explain these results in terms of models derived from the local approach to fracture. Two types of model are presented where the damage is, either uncoupled or coupled to the material behaviour. The uncoupled model with the Tai-Yang approach and the coupled model with the Rousselier potential give results in good agreement with the experiments.
© EDP Sciences 1996