Short surface fatigue cracks growth under constant and variable amplitude loading Article - Octobre 2009

Aboulghit El Malki Alaoui, David Thevenet, A. Zeghloul

Aboulghit El Malki Alaoui, David Thevenet, A. Zeghloul, « Short surface fatigue cracks growth under constant and variable amplitude loading  », Engineering Fracture Mechanics, octobre 2009, pp. 2359-2370. ISSN 0013-7944

Abstract

This paper deals with the fatigue strength of S355NL steel, of a common use within the shipbuilding industry, under uniaxial constant and variable loading. Indeed, ship structures are subjected to variable loading due to various sea states, wind and waves. As a consequence, a better knowledge of fatigue behavior under real loading conditions is needed. This study aims at analyzing the influence of loading conditions (load ratio and variable amplitude loading) on the short crack behavior and last, with a proposed model to assess the fatigue crack life. The tools used to prepare inspections in critical areas only take into account the long crack behavior. The results from the proposed model were compared to the assessments these tools are providing with.

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