Probabilistic characteristics of fracture toughness are studied for welded joint of 16MnR pressure vessel steel. The joint was divided into three independent zones, i.e. base material, weld metal and heat affect zone. The crack opening displacement δ c of each zone were measured and the probability density functions were obtained. Gaussian distribution, log normal distribution and Weibull distribution were taken into account. Using the K?S examination method, these three distributions were used to describ...
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