1. The Configurational Force Concept in Elastic-Plastic Fracture Mechanics−Instructive Examples
- Author
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Franz Dieter Fischer, Otmar Kolednik, and R. Schöngrundner
- Subjects
J integral ,Materials science ,business.industry ,Mechanical Engineering ,Crack tip opening displacement ,Fracture mechanics ,Structural engineering ,Mechanics ,Plasticity ,Crack growth resistance curve ,Elastic plastic ,Crack closure ,Mechanics of Materials ,Homogeneous ,General Materials Science ,business - Abstract
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. [1], 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.
- Published
- 2009
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