Fracture mechanics J-integral calculations in thermo-elasto-plasticity |
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Authors: | Hwa M Zien |
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Affiliation: | Babcock & Wilcox, A McDermott Company, Research and Development Division, P.O. Box 835, Alliance, OH 44601, U.S.A. |
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Abstract: | A finite element post-processor has been developed to calculate an incremental plasticity-based J-integral for fracture mechanics evaluations. The post-processor accounts for elastic-plastic deformations and thermal strains. The ADINA finite element computer program, with minor modifications by Babcock and Wilcox, was used with the Ramberg-Osgood stress-strain law and provides through its “porthole” files the required results of stresses, strains, displacements, and elastic and plastic strain energies. The numerical results of the post-processor indicate that the thermal J-integral, which consists of a line integral for the isothermal case and an additional area integral for the thermal effect, can be considered path-independent even in the presence of plastic and thermal strains. |
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