On the propagation of a crack in an elastic-brittle material

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Abstract

The Griffith theory of brittle cracking is extended to a dynamic problem, in which a semiinfinite craek in an infinite medium is extended by finite forces. The conclusion is drawn that the force required to maintain a steady rate of extension of the craek decreases as the rate increases. It is also observed that various criteria which may be assumed for crack division lead to limiting velocities of propagation of a single crack.

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The results presented in this paper were obtained in the course of research sponsored by the Office of Naval Research, under contract Nonr.-562(10) with Brown University.

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