On the Size and Shape of the Process Zone

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Department of Mechanical Engineering-Engineering Mechanics


We discuss a procedure for determining the size and shape of the process zone in an elastoplastic material. The basic features of Rice-Johnson elastoplastic analysis are utilized together with a linear distribution of the process zone forces and the smooth closure condition for the process zone faces. Three different methods are adopted for the calculation: one based on the elimination of the plastic singularity at the crack tip, another on the balance of energy at the onset of crack motion, and the third on an expression for the crack opening angle. Numerical results pertaining to these calculations are listed.

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© 1987

Publication Title

Engineering Fracture Mechanics