Strain intermittency due to avalanches in ferroelastic and porous materials
- Author(s)
- V. Soprunyuk, S. Puchberger, A. Tröster, Eduard Vives, Ekhard K H Salje, W. Schranz
- Abstract
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 v(m) = dh/dt are calculated from the measured strain drops and used to determine the corresponding Energy distributions N(E v(m)(2)). Power law distributions N(v(m)(2)) proportional to (v(m)(2))(-epsilon) have been obtained over 4-6 decades. For most of the porous materials and domain wall systems an exponent epsilon = 1.5 +/- 0.1 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.
- Organisation(s)
- Physics of Functional Materials
- External organisation(s)
- Technische Universität Wien, Universitat de Barcelona, University of Cambridge
- Journal
- Journal of Physics: Condensed Matter
- Volume
- 29
- No. of pages
- 7
- ISSN
- 0953-8984
- DOI
- https://doi.org/10.1088/1361-648X/aa6bd2
- Publication date
- 05-2017
- Peer reviewed
- Yes
- Austrian Fields of Science 2012
- 103015 Condensed matter
- Keywords
- ASJC Scopus subject areas
- Condensed Matter Physics, Materials Science(all)
- Portal url
- https://ucris.univie.ac.at/portal/en/publications/strain-intermittency-due-to-avalanches-in-ferroelastic-and-porous-materials(2121c16d-5969-43a5-9a57-44c16c1e4c6b).html