Abstract

On propose un modele dynamique des fissures dans un milieu aleatoire, specifie par la dimension fractale et la conformation des fissures. Le milieu est forme de differents types de segments. Sous contrainte, les directions des micro-fissures s'alignent partiellement le long de l'axe aise de la contrainte, et finalement provoquent la rupture du segment. La distribution des frequences de rupture est caracterisee par 2 parametres, correspondant a la dimension fractale D et a la «temperature reciproque»

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