Avalanches in wood compression
Statistical Mechanics
2015-09-01 v1 Materials Science
Soft Condensed Matter
Abstract
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.
Cite
@article{arxiv.1506.04563,
title = {Avalanches in wood compression},
author = {Tero Mäkinen and Amandine Miksic and Markus Ovaska and Mikko J. Alava},
journal= {arXiv preprint arXiv:1506.04563},
year = {2015}
}
Comments
5 pages, 5 figures