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An opportunistic analysis of the interface crack

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Abstract

When the loading of an interface crack involves also some shear, one of the contact zones is much larger than the other. Moreover, the small contact zone is extremely short in comparison to the length of the crack. It is possible to take advantage of this fact by neglecting the small contact zone altogether, because the resulting integral equation that pertains to the large contact zone and the conditions at the corresponding crack tip can then be solved in closed form. The paper derives the solution and shows that the results achieved are extremely accurate, provided the large contact zone is long in comparison to the small contact zone, and that it is not necessary for the large contact zone to be of the order of the crack length.

Résumé

Lorsque la mise en charge d'une fissure d'interface comporte également du cisaillement, l'une des zones de contact aux extrémités de cette fissure se trouve être beaucoup plus grande que l'autre. En outre, la petite zone de contact est comparativement très courte par rapport à la longueur de la fissure. On peut tirer profit de cette constatations en négligeant la petite zone de contact, puisque l'intégrale correspondant à la grande zone et les conditions relatives à la fissure en cet endroit peuvent être résolues sous une forme fermée. On procède à une telle résolution et on montre que les résultats obtenus sont extrèmement précis, pour autant que la grande zone de contact soit comparativement longue par rapport à la petite zone, et qu'il ne soil pas nécessaire qu'elle ait une longueur de l'ordre de celle de la fissure.

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Dundurs, J., Gautesen, A.K. An opportunistic analysis of the interface crack. Int J Fract 36, 151–159 (1988). https://doi.org/10.1007/BF00017793

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  • DOI: https://doi.org/10.1007/BF00017793

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