Abstract
We analyze the stochastic nature of various critical parameters responsible for the brittle fracture of nuclear pressure vessel steels. It is shown that the critical stress of brittle fracture Sc governing the process of propagation of shear microcracks can be regarded (with sufficient accuracy) as a deterministic parameter. At the same time, the critical parameter controlling the process of initiation of microcracks should be regarded as stochastic. On the basis of the performed analysis, we modify our local criterion of brittle fracture proposed earlier to the case of probabilistic statement of the problem.
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TsNII KM “Prometei,” St. Petersburg, Russia. Translated from Problemy Prochnosti, No. 1, pp. 5–20, January–February, 1999.
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Margolin, B.Z., Gulenko, A.G. & Shvetsova, V.A. Probabilistic prediction of the crack resistance of nuclear pressure vessel steels on the basis of a local approach. Part 1. Strength Mater 31, 1–12 (1999). https://doi.org/10.1007/BF02509734
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DOI: https://doi.org/10.1007/BF02509734