1212.3861 (Sylvain Patinet et al.)

Quantitative prediction of effective toughness at random heterogeneous
interfaces    [PDF]

Sylvain Patinet, Damien Vandembroucq, Stéphane Roux

The propagation of an adhesive crack through an anisotropic heterogeneous interface is considered. Tuning the local toughness distribution function and spatial correlation is numerically shown to induce a transition between weak to strong pinning conditions. While the macroscopic effective toughness is given by the mean local toughness in case of weak pinning, a systematic toughness enhancement is observed for strong pinning (the critical point of the depinning transition). A self-consistent approximation, is shown to account very accurately for this evolution, without any free parameter.

View original: http://arxiv.org/abs/1212.3861