In this paper, we present techniques for fatigue damage evaluation using spectral methodsand a model taking into account confined elasto-plastic behavior. The model is associatedwith a local fatigue approach, covering the whole endurance domain (low cycle and highcycle fatigue). It uses Neuber’s method and is valid for limited plasticity. To validatethis modeling, we perform a correlation between spectral methods, modified spectralmethods and experimental tests. Results presented here are focused on the uniaxial loadingcase.

The maximum (or extreme) response and fatigue damage spectra can be used for the severity comparison of several vibration with two criteria, the largest stress and the fatigue damage created on a linear one degree of freedom system. After defining these spectra, it is shown how they can be used to write a test specification from the life cycle profile of an equipment.

Dans cet article nous présentons quelques plans d'essais accélérés pour estimer la fiabilité des produits. Les plans étudiés sont basés sur le modèle standard de vie accélérée (SVA) en considérant des estimations paramétrique et non-paramétrique. Des applications sur des trombones, soumis à de la fatigue oligocyclique, sont présentées pour illustrer ces différents plans.