Steady-state mode I cracks in a viscoelastic triangular lattice

Details Steady-state mode I cracks in a viscoelastic triangular lattice Steady-state mode I cracks in a viscoelastic triangular lattice

2000-02-20

arxiv.org/abs/cond-mat/0002314v1

Physics

Condensed Matter

Materials Science

17 pages, 14 figures, RevTeX4

Scientific paper

We continue our study of the exact solutions for steady-state cracks in ideally brittle viscoelastic lattice models by focusing on mode I in a triangular system. The issues we address include the crack velocity versus driving curve as well as the onset of additional bond-breaking, signaling the emergence of complex spatio-temporal behavior. Somewhat surprisingly, the critical velocity for this transition becomes a decreasing function of the dissipation for sufficiently large values thereof. At the end, we briefly discuss the possible relevance of our findings for experiments on mode I crack instabilities.

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