Eventos Anais de eventos
MECSOL 2019
7th International Symposium on Solid Mechanics
Frequency-Domain Fatigue Analysis by Strain-Life Approach with Mean Stress Correction
Submission Author:
Renner Egalon Pereira , RJ , Brazil
Co-Authors:
Renner Egalon Pereira, Pedro Henrique Alves Correa, Jorge Alberto Rodriguez Duran
Presenter: Pedro Henrique Alves Correa
doi://10.26678/ABCM.MECSOL2019.MSL19-0165
Abstract
The mean stress effect in frequency-domain fatigue analysis by strain-life approach is presented in this paper, whose focus is set on an algorithm to correct the mean effect on the fatigue intensity damage by using the zero mean strain-life spectral method proposed by Nieslony and Macha (2007). The calculations have been performed for the 2024-T351 aluminum alloy under stationary random Gaussian strain response with positive mean value for both narrow and wide-band spectrum. Frequency-domain fatigue results were based on Manson-Coffin Strain-Life Curve and Palrmgren-Miner Rule. Elastic Morrow and SWT Mean Stress Correction Methods have been used with Ramberg-Osgood Relationship. The results for frequency domain approach present good agreement against the traditional time domain method and have become a great alternative to Traditional Rainflow Counting Method for both types of spectrum mentioned before.
Keywords
frequency domain, fatigue intensity damage, Manson-Coffin Strain-Life Curve, Spectral Method, mean stress
