Role of the sample thickness in planar crack propagation

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Journal Title
Journal ISSN
Volume Title
School of Science | A1 Alkuperäisartikkeli tieteellisessä aikakauslehdessä
Date
2013
Major/Subject
Mcode
Degree programme
Language
en
Pages
042411/1-7
Series
Physical Review E, Volume 88, Issue 4
Abstract
We study the effect of the sample thickness in planar crack front propagation in a disordered elastic medium using the random fuse model. We employ different loading conditions and we test their stability with respect to crack growth. We show that the thickness induces characteristic lengths in the stress enhancement factor in front of the crack and in the stress transfer function parallel to the crack. This is reflected by a thickness-dependent crossover scale in the crack front morphology that goes from from multiscaling to self-affine with exponents, in agreement with line depinning models and experiments. Finally, we compute the distribution of crack avalanches, which is shown to depend on the thickness and the loading mode.
Description
Keywords
disordered media, fractures
Other note
Citation
Barai, Pallab & Nukala, Phani K. V. V. & Alava, Mikko J. & Zapperi, Stefano. 2013. Role of the sample thickness in planar crack propagation. Physical Review E. Volume 88, Issue 4. 042411/1-7. ISSN 1539-3755 (printed). DOI: 10.1103/physreve.88.042411.