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Spectral fatigue life estimation for components under multiaxial random loading

: Nguyen, N.; Bacher-Höchst, M.; Sonsino, C.M.


Revue de metallurgie. Cahiers d'informations techniques : CIT 109 (2012), No.3, pp.149-156
ISSN: 0035-1563
Journal Article
Fraunhofer LBF ()

This paper presents a probabilistic method for fatigue life estimation within the frequency domain for structural elements subjected to multiaxial random loadings. Multivariate Monte Carlo Simulation is used to account for the correlation between the stress components and their different probability of occurrence and, moreover, enables stochastics during damage analysis to be allowed for and, at the same time, uses any suitable, material dependent multiaxial fatigue criterion known from the time domain. Comparison of the evaluated fatigue damage with experimental results from vibration tests on a demonstrator, chosen from common application fields in the automobile industry, shows good correlation.