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Registration Number

0223U000870, 0119U101760 , R & D reports

Title

Development of the technique of experimental evaluation of the resistance of the reactor steels at a biaxial load in the temperature range -150С ... + 350С

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Head

Sydiachenko Viacheslav G.,

Registration Date

21-01-2023

Organization

GS Pisarenko Institute of Strength Problems of the National Academy of Sciences of Ukraine

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 During the project, a number of methodological problems were solved which allowed to formulate the main provisions of the experimental method for estimating the crack resistance of reactor steels under biaxial loading, taking into account the test temperature. Based on the analysis of the operating conditions of reactor vessels, regulatory documents of nuclear energy, special requirements were formulated, special cruciform specimens with semi-elliptical and short through cracks were manufactured and experimentally investigated for crack resistance.. An experimental method for initiating fatigue semi-elliptical cracks of certain sizes has been developed for further tests for fracture toughness. An experimental method of cooling cruciform specimens has been developed in order to build the temperature dependence of the fracture toughness. Numerical modeling of the developed samples at different crack lengths (depths) was performed to calculate the parameters of linear and nonlinear fracture mechanics determined experimentally. The reliability of numerical calculations and experimental data was confirmed by comparison with known reference solutions and testing of standard test samples.

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