1st European Mechanics of Materials Conference on Local Approach to Fracture '86 - 96'
J. Phys. IV France 06 (1996) C6-483-C6-490
Model of Crack Propagation in Heterogeneous Materials Local ApproachP. Daguier, E. Bouchaud and G. Lapasset
ONERA (OM), 29 avenue de la Division Leclerc, BP. 72, 92322 Châtillon cedex, France
A continuous numerical model of pure mode I crack propagation in a bidimensional heterogeneous material is presented. This model describes the propagation of a macrocrack into a two-phases brittle material with a finite density of inclusions. The morphology of cracks produced for several mechanical and microstructural conditions is analysed. We find that the simulated cracks are self-affine. Furthermore, it is shown that there exists a microstructure leading to an optimal fracture toughness.
© EDP Sciences 1996