Сравнительный анализ и верификация инженерных методов учета эффекта коротких трещин при прогнозировании вязкости разрушения материалов корпусов атомных реакторов

Рассмотрены основные особенности разрушения образцов с короткими трещинами и дан краткий анализ основных методов, позволяющих прогнозировать температурную зависимость вязкости разрушения KJс(T) для коротких трещин. К ним относятся: DA-метод, (J–Q)-метод, (J–Т)-метод, «локальные» методы, использующие многопараметрические вероятностные подходы, GР-метод, использующий детерминистический «энергетический» подход, а также два инженерных метода – RMSC (Russian Method for Shallow Crack) и EMSC (European Method for Shallow Crack). На базе 13 наборов экспериментальных данных для российских и зарубежных сталей проведена детальная верификация и сравнительный анализ этих двух инженерных методов применительно к материалам корпусов атомных реакторов ВВЭР и PWR с учетом эффекта коротких трещин.

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