The methodology for the assessment of the safety of pressurized components containing welding defects and the related expert system

Abstract A structural parameter for characterizing the grade of welding defect damage is defined. The fuzzy fatigue diagram drawn by using data from fatigue tests has been considered as the basis for evaluating the probability of failure and the welding defect fatigue damage. The methodology for the safety assessment of pressurized components containing welding defects in loading based on the theory of fuzzy sets for treatment of imprecisions and uncertainties is proposed. An expert system aided assessment of welded destructive defects has been built by using Turbo-Prolog language.