Macroscopic yielding in jammed solids is accompanied by a non-equilibrium first-order transition in particle trajectories Auteur(s): Kawasaki T., Berthier L. (Article) Publié: Physical Review E: Statistical, Nonlinear, And Soft Matter Physics, vol. 94 p.022615 (2016) Texte intégral en Openaccess : Ref HAL: hal-01367384_v1 Ref Arxiv: 1507.04120 DOI: 10.1103/PhysRevE.94.022615 WoS: 000382177400007 Ref. & Cit.: NASA ADS Exporter : BibTex | endNote 44 Citations Résumé: We use computer simulations to analyse the yielding transition during large-amplitude oscillatory shear of a simple model for soft jammed solids. Simultaneous analysis of global mechanical response and particle-scale motion demonstrates that macroscopic yielding, revealed by a smooth crossover in mechanical properties, is accompanied by a sudden change in the particle dynamics, which evolves from non-diffusive motion to irreversible diffusion as the amplitude of the shear is increased. We provide numerical evidence that this sharp change corresponds to a non-equilibrium first-order dynamic phase transition, thus establishing the existence of a well-defined microscopic dynamic signature of the yielding transition in amorphous materials in oscillatory shear. Commentaires: 7 pages, 4 figures, Phys. Rev. E (in press). Réf Journal: Phys. Rev. E 94, 022615 (2016) |