Volume 78, Number 4, May 2007
|Number of page(s)||5|
|Section||Condensed Matter: Structural, Mechanical and Thermal Properties|
|Published online||08 May 2007|
Fracture surfaces of heterogeneous materials: A 2D solvable model
Laboratoire de Physique Statistique de l'Ecole Normale Supérieure, CNRS UMR 8550 - 24 rue Lhomond, 75231 Paris Cedex 05, France
Corresponding author: firstname.lastname@example.org
Accepted: 10 April 2007
Using an elastostatic description of crack growth based on the Griffith criterion and the principle of local symmetry, we present a stochastic model describing the propagation of a crack tip in a 2D heterogeneous brittle material. The model ensures the stability of straight cracks and allows for the study of the roughening of fracture surfaces. When neglecting the effect of the nonsingular stress, the problem becomes exactly solvable and yields analytic predictions for the power spectrum of the paths. This result suggests an alternative to the conventional power law analysis often used in the analysis of experimental data.
PACS: 68.35.Ct – Interface structure and roughness / 62.20.Mk – Fatigue, brittleness, fracture, and cracks / 05.10.Gg – Stochastic analysis methods (Fokker-Planck, Langevin, etc.)
© Europhysics Letters Association, 2007
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