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On a connection between certain semi-infinite and finite crack problems

✍ Scribed by C. Atkinson

Publisher: Springer Netherlands
Year: 1972
Tongue: English
Weight: 228 KB
Volume: 2
Category: Article
ISSN: 0374-3535
DOI: 10.1007/bf00125530

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✦ Synopsis

Two models of steady state brittle crack motion are commonly used. They are the models of Yoff6 (1) and of Craggs (2) (similar models have also been used by Barenblatt etc. of the Russian school). As is well known, Yoffr's model consists of a constant finite length crack moving with uniform velocity (i.e. the material closes up behind the crack as the crack advances) whereas Craggs's model consists of a semi-infinite crack with a finite region near its tip acted upon by a non-zero internal stress. Both these models have also been used with a Dugdale zone as an attempt to take into account the effect of plasticity at the moving crack tip.

= 1 -,

Ce and Ct are the velocities of dilatational and transverse waves respectively.

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