%0 conference lecture %@ %A Brocks, W., Siegmund, T. %D 1999 %J Constitutive and Damage Modeling of Inelastic Deformation and Phase Transformation; Proceedings of PLASTICITY '99: The Seventh International Symposium on Plasticity and Its Current Applications %P 545-548 %T Cohesive Strength and Separation Energy in Ductile Crack Growth %U %X