Abstract
The master curve brittle fracture toughness estimation method described in the ASTM E1921-11 test standard is based on a theoretical scatter and size effect assumption and makes use of a maximum likelihood estimation method to determine the fracture toughness transition temperature T0. The estimation method in E1921-11 is valid only for macroscopically homogeneous steels. If the steel is inhomogeneous, the maximum likelihood method applied in E1921-11 becomes unreliable. Here, a simple screening criterion, based on the SINTAP lower-tail estimation method, is proposed, and the efficiency and limitations of the criterion are shown for a variety of different types of inhomogeneity.
Original language | English |
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Pages (from-to) | 867-874 |
Journal | Journal of Testing and Evaluation |
Volume | 40 |
Issue number | 6 |
DOIs | |
Publication status | Published - 2012 |
MoE publication type | A1 Journal article-refereed |
Keywords
- master curve
- inhomogeneity
- screening criteria
- SINTAP lower-tail method