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- W4386971036 abstract "Abstract ISO 12135, a representative standard for the evaluation of fracture toughness, was revised in 2021. In the previous standard published in 2016, only yield strength was reflected for material property in fracture toughness calculation. In the revised standard, however, yield to tensile strength ratio is additionally reflected in consideration of strain hardening effect of the material. The current fracture toughness calculation formula evaluates fracture toughness reasonably considering the tensile characteristic. However, in some cases of cryogenic steels, fracture toughness is evaluated very conservatively than the previous procedure in 2016. In the case of STS 304L, there is no ductile-brittle transition phenomenon and it has excellent ductility and strength in cryogenic temperature. However, due to the secondary hardening phenomenon, yield to tensile strength ratio is relatively low, and as a result, fracture toughness is evaluated very low. The target of this study is to resolve the undervaluation of fracture toughness of cryogenic steel in the revised ISO 12135. For this purpose, the elastic and the plastic parameters in CTOD equation in ISO 12135 is examined. The crack tip profile is derived by a series of finite element analysis and crack tip opening displacement is calculated for the derivation of new parametric equations for cryogenic materials. The calculated crack tip opening displacement is validated by experimental results." @default.
- W4386971036 created "2023-09-23" @default.
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- W4386971036 date "2023-06-11" @default.
- W4386971036 modified "2023-09-29" @default.
- W4386971036 title "A Study on the Fracture Toughness Evaluation Considering Material Tensile Characteristic for Cryogenic Steel" @default.
- W4386971036 doi "https://doi.org/10.1115/omae2023-104718" @default.
- W4386971036 hasPublicationYear "2023" @default.
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