The Configurational Force Concept in Elastic-Plastic Fracture Mechanics−Instructive Examples
This paper deals with the determination of the crack driving force in elastic-plastic materials and its correlation with the J-Integral approach. In a real elastic-plastic material, the conventional J-integral cannot describe the crack driving force. This problem has been solved in Simha et al. , where the configurational force approach was used to evaluate in a new way the J-integral under incremental plasticity conditions. The crack driving force in a homogeneous elastic-plastic material, Jtip, is given by the sum of the nominally applied far-field crack driving force, Jfar, and the plasticity influence term, Cp, which accounts for the shielding or anti-shielding effect of plasticity. In this study, the incremental plasticity J-integral and the crack driving force are considered for a stationary and a growing crack.
M.H Aliabadi, S. Abela, S. Baragetti, M. Guagliano and Han-Seung Lee
R. Schöngrundner et al., "The Configurational Force Concept in Elastic-Plastic Fracture Mechanics−Instructive Examples", Key Engineering Materials, Vols. 417-418, pp. 297-300, 2010