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Updated: Jul 26, 2026

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Published on: May 20, 2018
Strain intermittency due to avalanches in ferroelastic and porous materials
V Soprunyuk1, S Puchberger1, A Tröster2
1Faculty of Physics, University of Vienna, Boltzmanngasse 5, 1090 Wien, Austria.
None:
The avalanche statistics in porous materials and ferroelastic domain wall systems has been studied for slowly increasing compressive uniaxial stress with stress rates between 0.2 and 17 kPa s-1. Velocity peaks [Formula: see text] are calculated from the measured strain drops and used to determine the corresponding Energy distributions [Formula: see text]. Power law distributions [Formula: see text] have been obtained over 4-6 decades. For most of the porous materials and domain wall systems an exponent [Formula: see text] was obtained in good agreement with mean-field theory of the interface pinning transition. For charcoal, shale and calcareous schist we found significant deviations of the exponents from mean-field values in agreement with recent acoustic emission experiments.
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