Eventos Anais de eventos
MECSOL 2019
7th International Symposium on Solid Mechanics
Spectral fatigue analysis for Al 2024-T3 with nonzero mean stress
Submission Author:
Pedro Henrique Alves Correa , RJ
Co-Authors:
Pedro Henrique Alves Correa, Renner Egalon Pereira, Jorge Alberto Rodriguez Duran
Presenter: Pedro Henrique Alves Correa
doi://10.26678/ABCM.MECSOL2019.MSL19-0163
Abstract
This paper consists of an overview of fatigue studies carried out on an Aluminum Alloy 2024-T3 in both time domain and frequency domain. A random signal of strain and stress are analyzed in time domain using usual Rainflow mothod and the damage is accumulated with the Palmgren-Miner rule, according to mean stress equations. The spectral domain analysis does not consider the prejudicial effect of the mean stress in metal life under fatigue, so it is used the correction factors for mean stresses developed by Goodman, Morrow, and Walker, changing the power spectral density and, thus, the damage calculated by the probability density functions postulated by Dirlik and Tovo and Benasciutti.
Keywords
fatigue, rainflow, frequency domain, mean stress, Power Spectral Density (PSD)
