title: Crack propagation in viscoelastic solids.
abstract: We study crack propagation in a viscoelastic solid. Using simple arguments, we derive equations for the velocity dependence of the crack-tip radius, a (v) , and for the energy per unit area to propagate the crack, G (v) . For a viscoelastic modulus E (omega) which increases as omega(1-s) (0< s< 1) in the transition region between the rubbery region and the glassy region, we find that a (v) approximately G (v) approximately v(alpha) with alpha= (1-s) / (2-s) . The theory is in good agreement with experiment.
authors.affiliation: IFF, FZ-Jülich, 52425 Jülich, Germany.
authors.forename: B N J
authors.initials: BN
authors.lastname: Persson
authors.forename: E A
authors.initials: EA
authors.lastname: Brener