Abstract
The path-independent T* integral is valid for any material-constitutive model under quasi-static as well as dynamic conditions. The T* integral has great potential as a unified crack-tip parameter for various types of fracture mechanics. A series of papers will be presented for research and development of the method of caustics for directly measuring the T* integral. In this paper, finite element simulation aided by computerized symbolic manipulation was carried out for the formation process of a caustic pattern for an elastoplastic crack-tip in a compact, tension specimen. The computerized symbolic manipulation system (REDUCE) showed great ability to obtain precisely simulated caustic patterns. The relations between the T* integral and the size of the caustic pattern were obtained for several cases.
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