Mechanical Engineering Faculty Research
Document Type
Conference Proceeding
Publication Date
2006
Abstract
This paper reviews recent developments in the Weibull stress model for prediction of cleavage fracture in ferritic steels. The procedure to calibrate the Weibull stress parameters builds upon the toughness scaling model between two crack configurations having different constraint levels and eliminates the recently discovered non-uniqueness that arises in calibrations using only fracture toughness data obtained under small scale yielding (SSY) conditions. The introduction of a non-zero threshold value for Weibull stress in the expression for cumulative failure probability is consistent with the experimental observations that there exists a minimum toughness value for cleavage fracture in ferritic steels, and brings numerical predictions of the scatter in fracture toughness data into better agreement with experiments. The calibrated model predicts accurately the toughness distributions for a variety of crack configurations including surface crack specimens subject to different combinations of bending tension.
Publication Title
Proceedings of the 9th European Mechanics of Materials Conference
First Page
93
Last Page
98
Recommended Citation
Gao, Xiaosheng and Dodds, Robert H. Jr., "Recent Development in the Weibull Stress Model for Prediction of Cleavage Fracture in Ferritic Steels" (2006). Mechanical Engineering Faculty Research. 940.
https://ideaexchange.uakron.edu/mechanical_ideas/940