Weibull Statistics as a Basis for Assessment of Ductile-Brittle Transition Behavior
The objective of this paper is to investigate failure characteristics of SA508 carbon steel in ductile-brittle transition temperature region. To achieve this goal, a series of finite element analyses as well as fracture toughness tests are performed for pre-cracked V-notch specimens. An assessment of failure probabilities is, then, carried out employing Weibull stress models with different rank probability options. Finally, a prototype of toughness scale diagram is derived through comparison of estimated fracture toughness data with those for compact tension specimens. The present results can be utilized to found a basis of realistic integrity evaluation on major nuclear components containing defect.
Soon-Bok Lee and Yun-Jae Kim
Y. S. Chang, T.R. Lee, J. B. Choi, Y. J. Kim, M. C. Kim, B. S. Lee, "Weibull Statistics as a Basis for Assessment of Ductile-Brittle Transition Behavior", Key Engineering Materials, Vols. 326-328, pp. 931-934, 2006