Nuclear Engineering and Design 116 (1989) 329-342 329 North-Holland, Amsterdam COMPUTATIONAL TECHNIQUES FOR INELASTIC STRESS AND FRACTURE ANALYSES
نویسنده
چکیده
Details of a unified creep-plasticity theory, based on the concept of an internal time, are presented, and a geometric interpretation of such a theory is given. A' tangent-stiffness' formulation, for the finite-element/boundary-element calculation of weak solutions of the strain-history in the structure, is presented. An implicit algorithm of generalized mid-point radial mapping for computing the stress-history at a material point for a given strain-history is given. Appropriate crack-tip parameters that may be used to correlate the creep-crack-growth data for single-dominate-flaws in structures operating at elevated temperatures are discussed.
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