Mean-field theory of localization in a fuse model.
We propose a mean-field theory for the localization of damage in a quasistatic fuse model on a cylinder. Depending on the quenched disorder distribution of the fuse thresholds, we show analytically that the system can either stay in a percolation regime up to breakdown, or start at some imposed current, to localize starting from the smallest scale (lattice spacing), or instead go to a diffuse localization regime where damage starts to concentrate in bands of width scaling as the width of the system, but remains diffuse at smaller scales. Depending on the nature of the quenched disorder on the fuse thresholds, we derive analytically the phase diagram of the system separating these regimes and the current levels for the onset of these possible localizations. We compare these predictions to numerical results.
Toussaint
Renaud
R
Institut de Physique du Globe de Strasbourg, CNRS, UMR 7516, 5 rue Descartes, F-67084 Strasbourg Cedex, France. Renaud.Toussaint@eost.u-strasbg.fr
Hansen
Alex
A