Eventos Anais de eventos
MECSOL 2022
8th International Symposium on Solid Mechanics
Computational homogenization for porous materials with Hill matrix and spherical voids
Submission Author:
Marcio Nilo Teodoro Galvão , RJ
Co-Authors:
Marcio Nilo Teodoro Galvão, Carlos Alberto da Maia, Rodrigo Rossi, Tiago dos Santos
Presenter: Marcio Nilo Teodoro Galvão
doi://10.26678/ABCM.MECSOL2022.MSL22-0043
Abstract
This work evaluates the overall strength of plastically anisotropic porous materials employing computational homogenization. The finite element simulations are based on unit cells representing an aggregate composed of a spherical void symmetrically distributed in an elastic-perfectly plastic matrix, obeying Hill’s yield criterion. Aiming at reaching distinct macroscopic stress states, mixed boundary conditions are imposed. Therefore, different macroscopic stress states are reached by varying specific loading parameters. The macroscopic stress components are calculated from the volume average of their microscopic counterparts, after reaching an asymptotic response. The study considers different initial void volume fractions and distinct matrix material anisotropies, thus addressing the effects of such material features on the macroscopic yield surfaces. The numerical results are compared with analytical strength criteria available in the literature.
Keywords
plasticity, porous material, Anisotropic material, computational homogenization, Finite Element Method
