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Stress intensity factors for a semi-elliptical crack in the surface of a semi-infinite solid

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Abstract

The stress intensity factors are presented for a vertical semi-elliptical surface crack in an elastic semi-infinite body which is subjected to a constant pressure on the crack surface. The approach utilizes a singular integral equation which is defined over the crack area only, where the weakness of the stress singularity is taken into account near the corner points at which the crack periphery intersects the surface of the semi-infinite body.

This pertinent approach provides the proper assessment of the stress intensity factors in the vicinity of the corner points, and reveals that the stress intensity factor reaches a maximum value near the corner point and then decreases to zero as the point is approached.

Résumé

On présente les facteurs d'intensité de contrainte pour une fissure de surface verticale semi-elliptique dans un corps élastique semi-infini soumis à une pression constante sur la surface de la fissure. L'approche utilisée recourt à une intégrale singulière définie uniquement sur la superficie de la fissure, où l'on prend en considération l'affaiblissement de la singularité des contraintes au voisinage des points où la périphérie de la fissure est en intersection avec la surface du corps semi-infini.

Cette approche permet d'obtenir les facteurs d'intensité de contrainte au voisinage des points considérés et révèle que le facteur d'intensité des contraintes passe par un maximum en ceux-ci et décroît vers zéro lorsqu'on s'en éloigne.

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Hayashi, K., Abé, H. Stress intensity factors for a semi-elliptical crack in the surface of a semi-infinite solid. Int J Fract 16, 275–285 (1980). https://doi.org/10.1007/BF00013383

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  • DOI: https://doi.org/10.1007/BF00013383

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