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On the evaluation of the J-integral by a plastic crack tip element by C. N. Duong; J. Yu is a Engineering article available to read on EtoBox.

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Two crack tip elements are formulated for a stationary, mode I plastic crack in planar structures using hybrid assumed stress approach, based on the secant modulus and the Newton-Raphson schemes, respectively. The stress distribution in the crack tip element is assumed to be the HRR field superimposed by the regular polynomial terms. The formulated (hybrid) crack tip elements are compatible with the isoparametric element so that they can be used conveniently along with the conventional displacement-based finite elements. The intensity of the HRR stress field, the J-integral, is determined directly from the finite element equations together with the nodal displacements. The dominance of the HRR stress field at the crack tip is pertinent to the present approach, which depends on geometry and loading conditions. Since the J-integral is globally path-independent for nonlinear elastic materials (deformation plasticity model), in order to assess the accuracy and efficiency of the methodology as compared to the contour integration approach, numerical studies of common plane-stress cracked configurations are performed for these materials. The results indicate that for a sufficiently small

Who reads On the evaluation of the J-integral by a plastic crack tip element?

Author

C. N. Duong; J. Yu

Publisher

Springer Netherlands; Springer-Verlag; Kluwer Academic Publishers; Wolters-Noordhoff; Springer Science and Business Media LLC (ISSN 1573-2673)

Published

1996

Language

EN

Field

Engineering (Physical Sciences)