Contribution à l'analyse de l'endommagement par fatigue et au dimensionnement de structures soumises à des vibrations aléatoires

Abstract : This dissertation is devoted to the development of a finite element pre-designing tool for the estimation of high cycle fatigue damage for linear structure subject to multiaxial and Gaussian stationary loads. Given the random nature of the stress state, it becomes necessary to look at this problem from a statistical point of view and spectral methods appear to be the best approach. In this work, spectral methods are improved by taking into account the response spectral bandwidths of structures under non proportional and non zero mean loads; the Sines' damage criterion is employed. The numerical analysis of the fatigue damage distribution resulting from the uncertainties of the material parameters and applications in the field of structural optimisation are also treated.
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Engineering Sciences [physics]. INSA de Rouen, 2007. French. <NNT : 2007ISAM0023>


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Sylvain Lambert. Contribution à l'analyse de l'endommagement par fatigue et au dimensionnement de structures soumises à des vibrations aléatoires. Engineering Sciences [physics]. INSA de Rouen, 2007. French. <NNT : 2007ISAM0023>. <tel-00560885>

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