Computational techniques for inelastic stress and fracture analyses

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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.

Original languageEnglish
Pages (from-to)329-342
Number of pages14
JournalNuclear Engineering and Design
Issue number3
StatePublished - Sep 2 1989


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