A 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 visco-plastic 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.
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Pierre-Philippe Cortet, Loïc Vanel, Sergio Ciliberto, Loic Vanel, Loı¨cloı¨c Vanel. A dynamical law for slow crack growth in polycarbonate films. Physical Review Letters, American Physical Society, 2007, 99 (20), ⟨10.1103/PhysRevLett.99.205502⟩. ⟨ensl-00156750v2⟩

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