330
T. Nagahata et al.
Fig. 23.4 Deterioration simulation procedure
Fig. 23.5 Evaluation of the occurrence of resultant events
the occurrence of “Stress corrosion cracking” is expressed as a function of “Temperature” and “Ion concentration”. The judgment function, which determines the
occurrence of the resultant event by the parameter of the input event, is registered
in the database of the deterioration mechanism in advance. If a judgment function
already exists, it is used, and if not, an appropriate function is used. As a method for
calculating the occurrence probability of the resultant event, the Monte Carlo method
is used (R and Raghavan 1995). The parameter generated randomly according to the
probability distribution of the input event is substituted into this judgement function
multiple times, and it is judged whether the resultant event occurs. In this way, the
T. Nagahata et al.
Fig. 23.4 Deterioration simulation procedure
Fig. 23.5 Evaluation of the occurrence of resultant events
the occurrence of “Stress corrosion cracking” is expressed as a function of “Temperature” and “Ion concentration”. The judgment function, which determines the
occurrence of the resultant event by the parameter of the input event, is registered
in the database of the deterioration mechanism in advance. If a judgment function
already exists, it is used, and if not, an appropriate function is used. As a method for
calculating the occurrence probability of the resultant event, the Monte Carlo method
is used (R and Raghavan 1995). The parameter generated randomly according to the
probability distribution of the input event is substituted into this judgement function
multiple times, and it is judged whether the resultant event occurs. In this way, the