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Article Dans Une Revue International Journal of Fatigue Année : 2015

Extraction of stress intensity factors for 3D small fatigue cracks using digital volume correlation and X-ray tomography

Résumé

This paper describes a methodology used to compute Stress Intensity Factor values along the curved front of a fatigue crack inside a nodular cast iron. An artificial defect is introduced at the surface of a small sample. The initiation and growth of a fatigue crack from this defect during constant amplitude cycling is monitored in situ by laboratory x-ray tomography. The method for processing the 3D images in order to compute SIF values is described in detail. The results obtained show variations of the stress intensity factor values along the crack front.
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hal-01537225 , version 1 (15-12-2017)

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J. Lachambre, Julien Réthoré, Arnaud Weck, Jean-Yves Buffiere. Extraction of stress intensity factors for 3D small fatigue cracks using digital volume correlation and X-ray tomography. International Journal of Fatigue, 2015, 71, pp.3-10. ⟨10.1016/j.ijfatigue.2014.03.022⟩. ⟨hal-01537225⟩
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