Eventos Anais de eventos
MECSOL 2022
8th International Symposium on Solid Mechanics
Phase field tensor model for damage induced anisotropy
Submission Author:
Ana Luísa Petrini , SP
Co-Authors:
Ana Luísa Petrini, José Luiz Boldrini, Carlos Lamarca Carvalho Sousa Esteves, Marco Bittencourt
Presenter: Ana Luísa Petrini
doi://10.26678/ABCM.MECSOL2022.MSL22-0094
Abstract
Creating a consistent model that properly captures the behavior of a material when exposed to loads and at the same time considers the influence of damage growth in the material properties can be challenging task. Specially in brittle materials, due to the damage mechanism of cleavage, as the damage grows, the material mechanical response is differently degraded according to the load direction considered, characterizing an anisotropic damage. A novel approach to model this phenomenon is presented here. A fourth order degradation tensor is introduced in a phase field framework in order to model the induced damage anisotropy without the necessity of defining the damage principal direction a priori. Moreover, different damage principal directions for different points in the material are allowed. Continuum damage mechanics ideas were used to obtain the degraded elastic energy. To guarantee thermodynamically consistency, the second law of thermodynamics is considered. The results showed that the adopted approach is able to simulate anisotropic damage totally driven by the strain state of the material.
Keywords
Phase field, anisotropic damage, tensor damage
