The effect of warm pre-stressing (WPS) on fracture toughness was evaluated for a reactor pressure vessel steel. Various types of thermomechanical loadings were applied to 1T-CT specimens. The results were compared with predictions from several analytical WPS engineering models. The specimen size effect was subsequently investigated under the load-unload-cool-fracture transient condition using 1T-, 0.4T-, and 0.16T-CT specimens. Analyses of the plastic zone distribution and residual stress were conducted to identify the difference in the WPS effect among the specimens.
Specimen Size Effect on Fracture Toughness of Reactor Pressure Vessel Steel Following Warm Pre-Stressing
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Iwata, K, Tobita, T, Takamizawa, H, Chimi, Y, Yoshimoto, K, & Nishiyama, Y. "Specimen Size Effect on Fracture Toughness of Reactor Pressure Vessel Steel Following Warm Pre-Stressing." Proceedings of the ASME 2016 Pressure Vessels and Piping Conference. Volume 1B: Codes and Standards. Vancouver, British Columbia, Canada. July 17–21, 2016. V01BT01A017. ASME. https://doi.org/10.1115/PVP2016-63795
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