Fast crack propagation by surface diffusion

Details Fast crack propagation by surface diffusion Fast crack propagation by surface diffusion

2002-04-02

arxiv.org/abs/cond-mat/0204056v1

Physics

Condensed Matter

Materials Science

Scientific paper

10.1103/PhysRevE.67.016112

We present a continuum theory which describes the fast growth of a crack by surface diffusion. This mechanism overcomes the usual cusp singularity by a self-consistent selection of the crack tip radius. It predicts the saturation of the steady state crack velocity appreciably below the Rayleigh speed and tip blunting. Furthermore, it includes the possibility of a tip splitting instability for high applied tensions.

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