Feszültségkorróziós repedésterjedés vizsgálata
Analysis of stress corrosion crack propagation
Keywords:
Stress corrosion cracking, light water reactor, finite element analysis, RMI model, agening mechanism, Feszültségkorróziós repedés, könnyűvizes reaktor, végeselem analízis, RMI modell, öregedési mechanizmusAbstract
Stress corrosion cracking is the phenomenon with the greatest impact on the safe operation of light water reactors. The severity of this failure makes it essential to develop a model to predict the growth rate of stress corrosion cracking. One such model is the RMI model, developed by Shoji et al. based on the slip-dissolution/oxidation theory. In the following, the implementation of such a model for stress corrosion crack propagation in finite element simulations is presented.
Kivonat
A feszültségkorróziós repedés a könnyűvizes reaktorok biztonságos működését legnagyobb mértékben befolyásoló jelenség. Ezen meghibásodás súlyossága elengedhetetlenné teszi egy olyan modell kialakítását, amellyel előre jelezhető a feszültségkorróziós repedés növekedési sebessége. Erre példa az RMI modell, amelyet Shoji és társai dolgoztak ki a repedéscsúcs alakváltozási sebességére vonatkozó elmélet alapján. A cikkben ezen modell végeselem szimulációba való implementálása kerül bemutatásra.
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