Phase Field Modeling of Fast Crack Propagation
arXiv:cond-mat/0508543 · doi:10.1103/PhysRevLett.96.015502
Abstract
We present a continuum theory which predicts the steady state propagation of cracks. The theory overcomes the usual problem of a finite time cusp singularity of the Grinfeld instability by the inclusion of elastodynamic effects which restore selection of the steady state tip radius and velocity. We developed a phase field model for elastically induced phase transitions; in the limit of small or vanishing elastic coefficients in the new phase, fracture can be studied. The simulations confirm analytical predictions for fast crack propagation.
5 pages, 11 figures
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