Brittle fracture down to femto-Joules - and below

Details Brittle fracture down to femto-Joules - and below Brittle fracture down to femto-Joules - and below

2007-08-31

arxiv.org/abs/0708.4315v2

Physics

Condensed Matter

Materials Science

REVTeX, new figure added, minor modifications to text

Scientific paper

We analyze large sets of energy-release data created by stress-induced brittle fracture in a pure sapphire crystal at close to zero temperature where stochastic fluctuations are minimal. The waiting-time distribution follows that observed for fracture in rock and for earthquakes. Despite strong time correlations of the events and the presence of large-event precursors, simple prediction algorithms only succeed in a very weak probabilistic sense. We also discuss prospects for further cryogenic experiments reaching close to single-bond sensitivity and able to investigate the existence of a transition-stress regime.

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