New model for surface fracture induced by dynamical stress

Details New model for surface fracture induced by dynamical stress New model for surface fracture induced by dynamical stress

1997-06-16

arxiv.org/abs/cond-mat/9706160v1

Physics

Condensed Matter

Materials Science

Revtex, 4 pages, 4 figures available upon request

Scientific paper

10.1103/PhysRevE.57.R1211

We introduce a model where an isotropic, dynamically-imposed stress induces fracture in a thin film. Using molecular dynamics simulations, we study how the integrated fragment distribution function depends on the rate of change and magnitude of the imposed stress, as well as on temperature. A mean-field argument shows that the system becomes unstable for a critical value of the stress. We find a striking invariance of the distribution of fragments for fixed ratio of temperature and rate of change of the stress; the interval over which this invariance holds is determined by the force fluctuations at the critical value of the stress.

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