Eventos Anais de eventos
MECSOL 2019
7th International Symposium on Solid Mechanics
A simple isotropic hardening rule accounting for grain size effects in metal plasticity: modeling from coarse-grained to nanocrystalline materials
Submission Author:
Tiago dos Santos , RS , Brazil
Co-Authors:
Tiago dos Santos, Pedro Rosa, Samir maghous, Rodrigo Rossi
Presenter: Tiago dos Santos
doi://10.26678/ABCM.MECSOL2019.MSL19-0035
Abstract
This work presents a novel phenomenological constitutive model intended to predict quasi-static stress-strain response in metal plasticity, from coarse-grained to nanocrystalline materials. To this end, a modified Voce hardening law is proposed, in which the initial yield stress and the saturation hardening parameters depend on the initial grain size. The constitutive model is adjusted considering experimental data available in literature for pure aluminum, copper and titanium. Comparisons with experimental data show the constitutive model capabilities, which in general provide good predictions for the three materials within wide strain and grain size ranges. The proposed model proved to be a simple and powerful constitutive tool for engineering and material design purposes.
Keywords
Grain size effects, Coarse-grained materials, Nanocrystalline materials, Hardening rule, Hall-Petch effect
