Simulated tensile response of a non-irradiated and irradiated stainless steel model скачать в хорошем качестве

Simulated tensile response of a non-irradiated and irradiated stainless steel model

The animation presents a simulated tensile response of a polycrystalline bar with 7x7x35 cubic grains (one element per grain) and random crystallographic orientations. A comparison is shown between non-irradiated (0 dpa) and neutron-irradiated (3.4 dpa) stainless steel aggregate strained to, respectivelly, 54% and 15%. A grain scale physical model, developed at CEA, has been implemented within a finite element framework to simulate a nonlinear mechanical behavior of austenitic stainless steels subjected to neutron irradiation. The model, based on dislocation dynamics inferred mechanisms and finite strain theory, is able to capture the irradiation-induced hardening followed by softening due to the formation of defect free channels during plastic deformation. S. El Shawish, L. Cizelj, B. Tanguy, X. Han, J. Hure, Extended Crystal Plasticity Finite Element Approach For Neutron Irradiated Austenitic Stainless Steels, 23rd International Conference Nuclear Energy for New Europe, September 8-11, 2014, Portoroz, Slovenia.