Avalanches in Wood Compression

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Journal Title
Journal ISSN
Volume Title
School of Science | A1 Alkuperäisartikkeli tieteellisessä aikakauslehdessä
Date
2015
Major/Subject
Mcode
Degree programme
Language
en
Pages
055501/1-5
Series
Physical Review Letters, Volume 115, Issue 5
Abstract
Wood is a multiscale material exhibiting a complex viscoplastic response. We study avalanches in small wood samples in compression. “Woodquakes” measured by acoustic emission are surprisingly similar to earthquakes and crackling noise in rocks and laboratory tests on brittle materials. Both the distributions of event energies and of waiting (silent) times follow power laws. The stress-strain response exhibits clear signatures of localization of deformation to “weak spots” or softwood layers, as identified using digital image correlation. Even though material structure-dependent localization takes place, the avalanche behavior remains scale-free.
Description
Keywords
avalanches, wood samples in compression
Other note
Citation
Mäkinen, T. & Miksic, A. & Ovaska, M. & Alava, Mikko J. 2015. Avalanches in Wood Compression. Physical Review Letters. Volume 115, Issue 5. 055501/1-5. ISSN 0031-9007 (printed). DOI: 10.1103/physrevlett.115.055501.