Effect of the porosity on the fracture surface roughness of sintered materials: From anisotropic to isotropic self-affine scaling
arXiv:1504.03998 · doi:10.1103/PhysRevE.91.012406
Abstract
To unravel how the microstructure affects the fracture surface roughness in heterogeneous brittle solids like rocks or ceramics, we characterized the roughness statistics of post-mortem fracture surfaces in home-made materials of adjustable microstructure length-scale and porosity, obtained by sintering monodisperse polystyrene beads. Beyond the characteristic size of disorder, the roughness profiles are found to exhibit self-affine scaling features evolving with porosity. Starting from a null value and increasing the porosity, we quantitatively modify the self-affine scaling properties from anisotropic (at low porosity) to isotropic (for porosity larger than 10 %).
arXiv comment10 pages, 10 figures, Physical Review E in Jan 2015, Vol. 91 Issue 1
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