Abstract
Fatigue crack initiation and propagation from notches in a cast steel to the specification B.S.1456A has been examined. Fracture mechanics methods are used. It is shown that reproducible data can be obtained on both initiation and propagation and that such data could be used in design. The experiments show that in the region of growth of small cracks from a notch there is a smooth change from the initiation behaviour to the growth characteristics of the longer crack.
Résumé
On a étudié l'amorçage et la propagation de fissures de fatigue à partir d'entailles dans un acier moulé répondant à la spécification BS. 1456. A. En utilisant les méthodes de la mécanique de rupture, on montre que des données reproductibles peuvent être obtenues en amorçage et en propagation et qu'elles sont utilisables pour la conception. Les essais montrent que dans la région où de petites fissures croissent à partir d'une entaille, il se produit une évolution régulière entre le comportement à l'amorçage et les caractéristiques de propagation d'une fissure.
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Barnby, J.T., Holder, R. Fatigue properties of a cast steel. Int J Fract 12, 631–637 (1976). https://doi.org/10.1007/BF00034648
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DOI: https://doi.org/10.1007/BF00034648