Abstract
Closed-form equations are derived for the asymptotic stresses in the neighborhood of a crack tip impinging on an interface between two isotropic materials. The symmetric problem is considered and follows from an exact elasticity solution formulated by Gupta [1]. The equations are valid for the planar problem, where the interface is straight and also for an axisymmetric problem in the presence of an annular or penny-shaped crack. The equations may serve to establish a tentative criterion that defines the subsequent direction of a crack impinging on a bimaterial interface. The ambiguity of the asymptotic stress state is highlighted and plausible application of the results is discussed.
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Pagano, N.J., Kaw, A.K. Asymptotic stresses around a crack tip at the interface between planar or cylindrical bodies. Int J Fract 71, 151–164 (1995). https://doi.org/10.1007/BF00033753
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DOI: https://doi.org/10.1007/BF00033753