Volume 109, Number 3, 2012
|149 - 156
|18 July 2012
Spectral fatigue life estimation for components under multiaxial random loading
Robert Bosch GmbH, Corporate Sector Research and Advance
Engineering, Schwieberdingen, Germany
2 Fraunhofer Institute for Structural Durability and System Reliability LBF, Darmstadt, Germany
Accepted: 2 April 2012
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.
Key words: Vibration / multiaxial random fatigue / spectral fatigue life / frequency domain
© EDP Sciences 2012
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