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Equivalent CTOD Ratio β for Engineering Assessment of CTOD Correction for Constraint Loss
Volume 1: Codes and Standards, 2008The critical CTOD δWP for structural components associated with plastic constraint loss in case of the brittle fracture over small-scale yielding condition can be corrected from CTOD fracture toughness δ by means of the “equivalent CTOD ratio β” defined as δ/δWP, which is based on the Weibull stress criterion. In this study, taking the case of specific
Mitsuru Ohata, Fumiyoshi Minami
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A Comparison Between BS7448-CTOD and ASTM E1290-CTOD in Linepipes
Volume 6: Materials Technology; C.C. Mei Symposium on Wave Mechanics and Hydrodynamics; Offshore Measurement and Data Interpretation, 2009ASTM E1290 previously used the plastic hinge model for the calculation of CTOD, but has changed its CTOD calculation to J-based conversion since 2002. In this study, the ratio of ASTM-CTOD to BS-CTOD was analytically predicted and experimentally evaluated in linepipes. It was demonstrated that the CTOD ratio changed according to CTOD itself, and took a
Yoichi Kayamori +2 more
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Proceedings of the 10th ACM international symposium on Mobility management and wireless access, 2012
Outlier detection is a well studied problem in various fields. The unique challenges of wireless sensor networks such as limited bandwidth, memory, energy, and unreliable communi- cation make this problem especially difficult. Sensors can detect outliers for a plethora of reasons and these reasons need to be inferred in real time.
Dylan McDonald +4 more
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Outlier detection is a well studied problem in various fields. The unique challenges of wireless sensor networks such as limited bandwidth, memory, energy, and unreliable communi- cation make this problem especially difficult. Sensors can detect outliers for a plethora of reasons and these reasons need to be inferred in real time.
Dylan McDonald +4 more
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CTOD estimates of surface cracked wide plates in bending—II. Level-3 CTOD method
Engineering Fracture Mechanics, 1991Abstract The Welding Institute Level-3 crack tip opening displacement (CTOD) method was expanded to be applicable to plane strain (Plane-strain Level-3 CTOD method). The definition of the reference strain is a major source of uncertainty in the application of the Level-3 CTOD method.
Fujikubo Masahiko +2 more
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A stretched zone method for ctod evaluation
International Journal of Fracture, 1991where Aa=~. h is the length (or width) of the stretched zone. Conventionally, the deformed crack tip is considered to be of a semi-circular type leading to a blunting angle of 45 degrees. However, viewpoints contrary to this have been expressed [3-5].
R. K. Pandey, P. Sundaram, A. N. Kumar
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1986
Experiences and test results of IWM concerning the fracture mechanics characterization of multipass submerged arc and manual metal arc welds in thick components of C-Mn, steel are described. The influences of materials, fabrication parameters and testing variables on the fracture toughness in terms of critical CTOD are discussed.
J. G. Blauel, W. Burget
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Experiences and test results of IWM concerning the fracture mechanics characterization of multipass submerged arc and manual metal arc welds in thick components of C-Mn, steel are described. The influences of materials, fabrication parameters and testing variables on the fracture toughness in terms of critical CTOD are discussed.
J. G. Blauel, W. Burget
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The Study of CTOD Test and Allowable Value
Advanced Materials Research, 2013In order to determine the heavy plate structure have sufficient fracture toughness, based on BS7448 fracture toughness test experiment standard,the study of the typical bridge steel material were extended to CTOD( crack tip open displacement) fracture toughness test at 20 °C, The average CTOD value of base metal which was more than the allowable value ...
Qi Ming Yu, Hao Liang Sa
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Application of CTOD in atomistic modeling of fracture
Engineering Fracture Mechanics, 2015Abstract In this presentation we first review a method to use crack tip displacements and an estimate of the plastic zone to estimate fracture toughness. The same procedure was then applied on nanosized bcc-Fe cantilever beams with an initial crack. The results were then compared to literature.
Jørn Skogsrud, Christian Thaulow
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Problems of Numerical CTOD Anlayses
1986The interest of fracture mechanics research in CTOD (crack-tip opening displacement) results from its close relationship to the asymptotic strain field. In theoretical investigations a realistic CTOD may therefore depend on a representative strain field in the near-tip region.
H. Amstutz, T. Seeger
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Materials Science Forum, 2012
This paper presents a new fracture assessment method, IST method developed as ISO 27306. The IST method implements an equivalent CTOD ratio, β, for the CTOD toughness correction for constraint loss in structural components. Using β, the standard fracture toughness specimen and structural components are linked at the same level of the Weibull stress ...
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This paper presents a new fracture assessment method, IST method developed as ISO 27306. The IST method implements an equivalent CTOD ratio, β, for the CTOD toughness correction for constraint loss in structural components. Using β, the standard fracture toughness specimen and structural components are linked at the same level of the Weibull stress ...
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