Experimental investigations on the growth of small fatigue cracks in naval steel |
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| Authors: | A. ELMALKI ALAOUI D. THEVENET A. ZEGHLOUL |
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| Affiliation: | LMSN, ENSIETA, 2 rue François Verny, 29806 Brest Cedex 9, France;, LPMM, UMR CNRS 7554, Universitéde Metz, Ile du Saulcy, 57045 Metz Cedex 1, France |
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| Abstract: | The concept of damage tolerance is now largely employed to evaluate the fatigue life of structures. However, part of this fatigue relies on the initiation and growth of small cracks. The fatigue behaviour of a naval structural steel (S355NL) was investigated. In order to characterize the behaviour of short and long cracks, tests were performed under constant amplitude loading for several load ratios between –1.0 and 0.5. A major part of fatigue life is constituted by short crack initiation and propagation. |
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| Keywords: | crack closure long fatigue crack short fatigue crack stress ratio |
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