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Spectral fatigue life estimation for components under multiaxial random loading

Published online by Cambridge University Press:  18 July 2012

N. Nguyen ,
M. Bacher-Höchst  and
C.M. Sonsino
N. Nguyen
Affiliation:
Robert Bosch GmbH, Corporate Sector Research and Advance Engineering, Schwieberdingen, Germany. e-mail: NgocBao.Nguyen@de.bosch.com
M. Bacher-Höchst
Affiliation:
Robert Bosch GmbH, Corporate Sector Research and Advance Engineering, Schwieberdingen, Germany. e-mail: NgocBao.Nguyen@de.bosch.com
C.M. Sonsino
Affiliation:
Fraunhofer Institute for Structural Durability and System Reliability LBF, Darmstadt, Germany
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Abstract

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.

Keywords

Vibrationmultiaxial random fatiguespectral fatigue lifefrequency domain
Type
Research Article
Information
Metallurgical Research & Technology , Volume 109 , Issue 3 , 2012 , pp. 149 - 156
Copyright
© EDP Sciences 2012

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