title: Dynamical law for slow crack growth in polycarbonate films.
abstract: We study experimentally the slow growth of a single crack in polycarbonate films submitted to uniaxial and constant imposed stress. For this viscoplastic material, we uncover a dynamical law that describes the dependence of the instantaneous crack velocity with experimental parameters. The law involves a Dugdale-Barenblatt static description of crack tip plastic zones associated to an Eyring's law and an empirical dependence with the crack length that may come from a residual elastic field.
authors.affiliation: Université de Lyon, Laboratoire de physique, Ecole Normale Supérieure de Lyon, CNRS, France.
authors.forename: Pierre-Philippe
authors.initials: PP
authors.lastname: Cortet
authors.forename: Loïc
authors.initials: L
authors.lastname: Vanel
authors.forename: Sergio
authors.initials: S
authors.lastname: Ciliberto