Effect of disorder and notches on crack roughness

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Journal Title
Journal ISSN
Volume Title
School of Science | A1 Alkuperäisartikkeli tieteellisessä aikakauslehdessä
Date
2007
Major/Subject
Mcode
Degree programme
Language
en
Pages
056111/1-6
Series
Physical Review E, Volume 76, Issue 5
Abstract
We analyze the effect of disorder and notches on crack roughness in two dimensions. Our simulation results based on large system sizes and extensive statistical sampling indicate that the crack surface exhibits a universal local roughness of ζloc=0.71 and is independent of the initial notch size and disorder in breaking thresholds. The global roughness exponent scales as ζ=0.87 and is also independent of material disorder. Furthermore, we note that the statistical distribution of crack profile height fluctuations is also independent of material disorder and is described by a Gaussian distribution, albeit deviations are observed in the tails.
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Keywords
crack roughness, disorder, notches
Other note
Citation
Nukala, Phani K. V. V. & Zapperi, Stefano & Alava, Mikko J. & Simunovic, Srdan. 2007. Effect of disorder and notches on crack roughness. Physical Review E. Volume 76, Issue 5. 056111/1-6. ISSN 1539-3755 (printed). DOI: 10.1103/physreve.76.056111.