Host: The Japan Society of Mechanical Engineers
Name : [in Japanese]
Date : September 26, 2022 - September 28, 2022
In the next-generation fast reactor, 316FR steel is expected as a structural material of the reactor vessel, and in the design of a large tank reactor, it is inevitable to place the weld bead on the high stress part. Therefore, a creep-fatigue evaluation method that can appropriately evaluate weld joint is required. The welded joint is composed of a base metal, weld metal and heat-affected zone. In this study, finite element analysis considering these material property differences was performed on the test piece of the welded joint. And the creep fatigue life was evaluated based on the stress redistribution during the test. Our evaluation method was able to predict the number of failures in the fatigue test and creep fatigue test within the factor of 10.
