Evaluation of the elastic-plastic mixity parameters on the base of different crack propagation criteria. Part 1. Preliminary analysis |
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Authors: | V N Shlyannikov Zh M Sakhabutdinov |
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Affiliation: | (1) Kazan State Power Engineering University, Kazan, Russia |
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Abstract: | In order to evaluate the mechanical behavior around small-scale yielding crack tip for both plane strain and plane stress, the asymptotic governing equations and their boundary conditions by considering fracture mechanisms are formulated. A total deformation theory of plasticity with a power-law hardening is used. The analysis of the near-tip fields is carried out for both the maximum tensile and shear stress crack growth direction criteria, as well as for the complete range of mixity parameters and various strain-hardening levels. The new scheme of mixed-mode problem solution is proposed. Realationships between elastic and plastic mixity parameters are given as functions of the crack growth direction criterion and the strain-hardening exponent.Translated from Problemy Prochnosti, No. 1, pp. 60–75, January–February, 2005 |
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Keywords: | mixed mode crack behavior small-scale yielding fracture mechanism change crack growth direction mixity parameters |
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