Volume 34, Number 2, April II 1996
|Page(s)||121 - 126|
|Section||Condensed matter: structure, thermal and mechanical properties|
|Published online||01 September 2002|
On the universality of fracture surface roughness
Department of Applied Mathematics, Research School of Physical Sciences and
Engineering, Australian National University - Canberra ACT 0200, Australia
2 Department of Mathematics, University of Melbourne - Parkville, VIC 3052, Australia
3 CSIRO Division of Petroleum Resources, PO Box 3000 Glen Waverley, VIC 3150, Australia
Accepted: 23 February 1996
We measure the roughness of fracture surfaces generated in uniaxial tension for model materials in two and three dimensions. We study the effect of disorder, of anisotropy of material properties and of dimensionality on surface roughness. Although the roughness exponent ζ is always found within a narrow range, its value systematically decreases as the extent of disorder is increased. For anisotropic materials the scaling properties are found to be independent of the orientation. These results indicate that the scaling properties of the fracture surface are not universal, but depend, albeit weakly, on material properties. While values of the roughness exponent ζ are independent of dimension, differences in the fracture morphology and in the breakdown characteristics are noted.
PACS: 62.20.Mk – Fatigue, brittleness, fracture, and cracks / 81.40.Np – Fatigue, embrittlement, and fracture / 61.41.+e – Polymers, elastomers, and plastics
© EDP Sciences, 1996
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