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Università di Roma I |
Abstract
Recent experiments (Phys. Rev. Lett. 89, 185503 (2002)) have demonstrated that ordinary paper fracture produces "mini-earthquakes" with an energy distribution resembling of the Gutenberg-Richter law, and with complicated temporal statistics. These can be compared - with intriguingly little success - to models for fracture in inhomogenous media. I also outline recent unpublished work on the AE statistics of peeling fracture. Here one can modify the exponents, while the burst energies still remain scaleinvariant. Indications for materials science and theory are outlined.