Misorientation Effects in an Anisotropic Plasticity Finite Element Model of a Polycrystalline under Tensile Loading
| Autor: | SHAWISH Samir El, CIZELJ Leon, SIMONOVSKI IGOR |
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| Jazyk: | angličtina |
| Rok vydání: | 2012 |
| Popis: | In this work we propose an anisotropic elasto-plastic finite element model to account for various observations in the tensile test experiments on stainless steel specimen. Using Voronoi construction for the grains, grain boundaries and anisotropic Hill’s plastic potential function, we find a clear correlation between the computed average misorientation angle, measuring the change of local crystal orientations, and the applied plastic strain, in agreement with the electron backscatter diffraction measurements. For various tessellations with different numbers of grains and initial random crystal orientations we find the calibrating values for the Hill’s parameters that fit simultaneously the measured macroscopic stress-strain curve as well as the average spread of crystal orientations. JRC.F.4-Nuclear Reactor Integrity Assessment and Knowledge Management |
| Databáze: | OpenAIRE |
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