Roughness of sandstone fracture surfaces: Profilometry and shadow length investigations - Archive ouverte HAL Access content directly
Journal Articles The European Physical Journal B: Condensed Matter and Complex Systems Year : 1999

Roughness of sandstone fracture surfaces: Profilometry and shadow length investigations

Abstract

The geometrical properties of fractured sandstone surfaces were studied by measuring the length distribution of the shadows appearing under grazing illumination. Three distinct domains of variation were found: at short length scales a cut-off of self-affinity is observed due to the inter-granular rupture of sandstones, at long length scales, the number of shadows falls off very rapidly because of the non-zero illumination angle and of the finite roughness amplitude. Finally, in the intermediate domain, the shadow length distribution displays a power law decrease with an exponent related to the roughness exponent measured by mechanical profilometry. Moreover, this method is found to be more sensitive to deviations from self-affinity than usual methods.
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Dates and versions

hal-03607591 , version 1 (14-03-2022)

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Jean-Marc Boffa, C. Allain, R. Chertcoff, Jean-Pierre Hulin, Franck Plouraboué, et al.. Roughness of sandstone fracture surfaces: Profilometry and shadow length investigations. The European Physical Journal B: Condensed Matter and Complex Systems, 1999, 7 (2), pp.179-182. ⟨10.1007/s100510050602⟩. ⟨hal-03607591⟩
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