Fatigue life under non-Gaussian random loading from various models

Alexis Banvillet (1) , T. Lagoda (2) , E. Macha (2) , A. Nieslony (2) , Thierry Palin-Luc (3, 1) , J-F. Vittori (4)

1 LAMEFIP - Laboratoire Matériaux Endommagement Fiabilité et Ingénierie des Procédés
2 Opole - University of Technology
3 I2M - Institut de Mécanique et d'Ingénierie de Bordeaux
4 Technocentre Renault [Guyancourt]

Fatigue test results on the 10HNAP steel under constant amplitude and random loading with non-Gaussian probability distribution function, zero mean value and wide-band frequency spectrum have been used to compare the life time estimation of the models proposed by Bannantine, Fatemi–Socie, Socie, Wang–Brown, Morel and Łagoda–Macha. Except the Morel proposal which accumulates damage step by step with a proper ethodology, all the other models use a cycle counting method. The rainflow algorithm is used to extract cycles from random histories of damage parameters in time domain. In the last model, where a strain energy density parameter is employed, additionally spectral method is evaluated for fatigue life calculation in the frequency domain. The best and very similar results of fatigue life assessment have been obtained using the models proposed by Socie and by Łagoda–Macha, both in time and frequency domains for the last one.

Mots clés: Fatigue life calculation; Strain energy; Spectral method; Rainflow algorithm; Random loading

Domaines: Mécanique [physics.med-ph]; Génie mécanique [physics.class-ph]; Mécanique des structures [physics.class-ph]; Vibrations [physics.class-ph]

Alexis Banvillet, T. Lagoda, E. Macha, A. Nieslony, Thierry Palin-Luc, et al.. Fatigue life under non-Gaussian random loading from various models. International Journal of Fatigue, 2004, 26, pp.349-363. ⟨10.1016/j.ijfatigue.2003.08.017⟩. ⟨hal-01372057⟩