Eventos Anais de eventos
MecSol 2017
6th International Symposium on Solid Mechanics
Axial-Torsion Testing and Modeling of Fatigue in Extruded AZ31B Magnesium Alloy
Submission Author:
Fábio Castro , DF
Co-Authors:
Edgar Mamiya, Lucival Malcher
Presenter: Fábio Castro
doi://10.26678/ABCM.MecSol2017.MSL17-0061
Abstract
The Lemaitre damage model is evaluated using fatigue test data from extruded AZ31B magnesium alloy. The experimental data were obtained from thin-walled tubular specimens subjected to tension–compression, torsion, proportional axial-torsion, and 90º out-of-phase axial-torsion. The Lemaitre model has a difficulty to correlate the data under cyclic torsion loading. A modified Lemaitre model, where the damage denominator depends on the stress triaxiality, correlates well all test data. A simple and fast method is described for determining the material constants in the model.
Keywords
magnesium alloy, multiaxial fatigue, Fatigue Life, crack initiation
