Avalanches in wood compression

Wood is a multi-scale 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. Bo...

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Bibliographic Details
Published inarXiv.org
Main Authors Mäkinen, Tero, Miksic, Amandine, Ovaska, Markus, Alava, Mikko J
Format Paper Journal Article
LanguageEnglish
Published Ithaca Cornell University Library, arXiv.org 15.06.2015
Subjects
Acoustic emission testing
Acoustic noise
Avalanches
Brittle materials
Compression tests
Deformation
Digital imaging
Laboratory tests
Localization
Multiscale analysis
Physics - Materials Science
Physics - Soft Condensed Matter
Physics - Statistical Mechanics
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Summary:Wood is a multi-scale 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.
ISSN:2331-8422
DOI:10.48550/arxiv.1506.04563