Eventos Anais de eventos
MECSOL 2019
7th International Symposium on Solid Mechanics
A Thermodynamically Consistent Phase Field Framework for Anisotropic Structural Damage
Submission Author:
Ana Luísa Petrini , SP
Co-Authors:
Ana Luísa Petrini, Marco Bittencourt, José Luiz Boldrini
Presenter: Ana Luísa Petrini
doi://10.26678/ABCM.MECSOL2019.MSL19-0139
Abstract
Many phase field formulations have been developed to simulate damage evolution taking into account different phenomena such as plasticity, large deformation, anisotropy and fracture behavior of materials. In the present work, a thermodynamic consistent damage phase field formulation is adapted to include the anisotropic effect of preferential cleavage planes in the damage evolution. A phase field damage scalar variable is associated with each predefined preferential direction of crack propagation. Any other possible different direction is penalized by a parameter (beta>>1) that represents the anisotropy of the fracture. By defining beta=0, the isotropic case is recovered. In case of more than one preferential direction, the material is considered totally fractured when one of the damage variables reaches one. Preliminary tests show that the model can reproduce the expected crack propagation pattern. Effects like temperature and fatigue also have been included in the model.
Keywords
Phase field models, Damage, Finite Element Method, anisotropy
