Abstract.
We study the acoustic emission produced by micro-cracks using a two-dimensional disordered lattice model of dynamic fracture, which allows to relate the acoustic response to the internal damage of the sample. We find that the distributions of acoustic energy bursts decays as a power law in agreement with experimental observations. The scaling exponents measured in the present dynamic model can related to those obtained in the quasi-static random fuse model.
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In quasistatic models, the damage displays a singular derivative when plotted against stress. This could also be found in our model if we invert the stress-strain curve. The peak in the curve translates into a singular derivative in the inverse curve
The distribution of the “elastic” energy released in each avalanche was recently measured in the quasi-static FBM and found to decay as power law with exponent \(\beta\simeq 1.8\) [8], in agreement with our results
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Received: 19 September 2003, Published online: 8 December 2003
PACS:
62.65. + k Acoustical properties of solids - 46.50. + a Fracture mechanics, fatigue and cracks
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Minozzi, M., Caldarelli, G., Pietronero, L. et al. Dynamic fracture model for acoustic emission. Eur. Phys. J. B 36, 203–207 (2003). https://doi.org/10.1140/epjb/e2003-00336-7
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DOI: https://doi.org/10.1140/epjb/e2003-00336-7