Eventos Anais de eventos
COBEM 2021
26th International Congress of Mechanical Engineering
An assessment of the void distribution on the computationally homogenized constitutive behavior of porous ductile media
Submission Author:
Wanderson Ferreira dos Santos , GO , Brazil
Co-Authors:
Wanderson Ferreira dos Santos, Ayrton Ribeiro Ferreira, Sergio Persival Proenca
Presenter: Wanderson Ferreira dos Santos
doi://10.26678/ABCM.COBEM2021.COB2021-2071
Abstract
The macroscopic constitutive behavior of metals and alloys depends on phenomena originated at the microscale. For example, the effect of porosity can be relevant in the process of ductile failure of these materials. This motivated the development of specialized plastic models to predict the failure of porous ductile solids. In many cases, the yield criteria for porous ductile media adopt the idealized hypothesis of a centered single void in a volume cell. However, in real situations, the voids are randomly distributed within the ductile matrix. In this context, the present paper uses a computational homogenization procedure to study the influence of the void distribution on the homogenized constitutive behavior of porous ductile media. The concept of Representative Volume Element (RVE) is used to model the microstructure of the material. Uniform or periodic boundary conditions are tested in each RVE. The RVE matrix is governed by the von Mises model with perfect elastoplastic behavior. The homogenized constitutive response is obtained by the volume averaging of the microscopic fields provided by the finite element analyses using the ANSYS software. The results show that the void distribution can significantly influence the macroscopic constitutive behavior of porous ductile media.
Keywords
metals and alloys, computational homogenization, constitutive behavior, Microstructure, void distribution
