Crack growth resistance in non-perfect plasticity: Isotropic versus kinematic hardening |
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Authors: | Andrea Carpinteri |
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Institution: | Istituto di Scienza delle Costruzioni, University of Bologna, 40136 Bologna, Italy |
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Abstract: | The Strain Energy Density Theory is applied for analyzing energy dissipation and crack growth in the three-point bending specimen when the material behavior follows a multilinear strain-hardening stress-strain relationship. The problem is solved through the application of incremental theory of plasticity and finite element method.The rate of change of the strain energy density factor S with crack length a is verified to be governed by the relation
. Results are obtained for isotropic and kinematic hardening. Moreover, the effects of loading step and specimen size are pointed out. |
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