Gael Pallares, Cindy L. Rountree, Ludovic Douillard, Fabrice Charra, Elisabeth Bouchaud
Fractoluminescence experiments are performed on two kinds of silicate glasses. All the light spectra collected during dynamic fracture reveal a black body radiator behaviour, which is interpreted as a crack velocity-dependent temperature rise close to the crack tip. Crack velocities are estimated to be of the order of 1300 m.s$^{-1}$ and fracture process zones are shown to extend over a few nanometers.
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http://arxiv.org/abs/1207.0113
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