Archive ouverte HAL – Universal Scaling of the Velocity Field in Crack Front Propagation

Clément Le Priol 1 Pierre Le Doussal 2 Laurent Ponson 3 Alberto Rosso 4 Julien Chopin 5

Clément Le Priol, Pierre Le Doussal, Laurent Ponson, Alberto Rosso, Julien Chopin. Universal Scaling of the Velocity Field in Crack Front Propagation. Physical Review Letters, American Physical Society, 2020, 124 (6), ⟨10.1103/PhysRevLett.124.065501⟩. ⟨hal-02512228⟩

The propagation of a crack front in disordered materials is jerky and characterized by bursts of activity, called avalanches. These phenomena are the manifestation of an out-of-equilibrium phase transition originated by the disorder. As a result avalanches display universal scalings which are however difficult to characterize in experiments at finite drive. Here we show that the correlation functions of the velocity field along the front allow to extract the critical exponents of the transition and to identify the universality class of the system. We employ these correlations to characterize the universal behavior of the transition in simulations and in an experiment of crack propagation. This analysis is robust, efficient and can be extended to all systems displaying avalanche dynamics.

  • 1. LPENS (UMR_8023) - Laboratoire de physique de l'ENS - ENS Paris
  • 2. Champs Aléatoires et Systèmes hors d'Équilibre
  • 3. DALEMBERT - Institut Jean Le Rond d'Alembert
  • 4. LPTMS - Laboratoire de Physique Théorique et Modèles Statistiques
  • 5. IF-UFB - Instituto de Fisica, Universidade Federal da Bahia