Abstract
A method is presented for predicting JR curves for reactor pressure-vessel steels. The authors propose a procedure for determining the ductile fracture model parameters from the test results for smooth and notched cylindrical specimens. The stress and strain fields at the tip of a stationary and propagating cracks are studied by the finite-element method. The predicted JR curves are compared to the experimental data obtained for the 2T-CT-type specimens of 15Kh2NMFA-A reactor pressure-vessel steel in the initial and embrittled state.
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