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TECHNICAL PAPERS

On Relevant Ramberg-Osgood Fit to Engineering Nonlinear Fracture Mechanics Analysis

[+] Author and Article Information
Yun-Jae Kim

Department of Mechanical Engineering, Korea University, Anam-dong, Sungbuk-ku, Seoul 136-701, Korea

Nam-Su Huh, Young-Jin Kim

SAFE Research Center, School of Mechanical Engineering, Sungkyunkwan University 300 Chunchun-dong, Jangan-gu, Suwon, Kyonggi-do 440-746, Korea

Young-Hwan Choi

Korea Institute of Nuclear Safety, Yusung, Taejon, Korea

Jun-Seok Yang

Korea Electric Power Research Institute, Yusung, Taejon, Korea

J. Pressure Vessel Technol 126(3), 277-283 (Aug 18, 2004) (7 pages) doi:10.1115/1.1760767 History: Received February 06, 2003; Revised July 18, 2003; Online August 18, 2004
Copyright © 2004 by ASME
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References

Figures

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Comparison of FE J values based on incremental plasticity using actual stress-strain data with those based on deformation plasticity using R-O fits, for the type 316 stainless steel at 296°C. Descriptions on the R-O fit and associated R-O parameters can be found in Table 1.
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Comparison of FE J values based on incremental plasticity using actual stress-strain data with those based on deformation plasticity using R-O fits, for the type 316 stainless steel at room temperature. Descriptions on the R-O fit and associated R-O parameters can be found in Table 1.
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Comparison of FE J values based on incremental plasticity using actual stress-strain data with those based on deformation plasticity using R-O fits, for the carbon steel at room temperature. Descriptions on the R-O fit and associated R-O parameters can be found in Table 1.
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Comparison of FE J values based on incremental plasticity using actual stress-strain data with those based on deformation plasticity using R-O fits, for the mild steel at room temperature. Descriptions on the R-O fit and associated R-O parameters can be found in Table 1.
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Comparison of FE COD values based on incremental plasticity using actual stress-strain data with those based on deformation plasticity using R-O fits, for the type 316 stainless steel at room temperature. Descriptions on the R-O fit and associated R-O parameters can be found in Table 1.
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Schematic illustration of a circumferential through-wall cracked pipe under bending
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A three-dimensional FE mesh for the circumferentially through-wall cracked pipe
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True stress strain data with its R-O fits for two materials, the Type 316 stainless steel and the mild steel at room temperature: (a) and (b) are shown in entire strain range, whereas (c) and (d) are up to 5 percent strain
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Comparison of FE J values based on incremental plasticity using actual stress-strain data with those based on deformation plasticity using three different R-O fits. Descriptions on the R-O fit and associated R-O parameters can be found in Table 1.
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True stress strain data with the R-O fits according to the proposed method for two materials, the Type 316 stainless steel and the mild steel at room temperature: (a) and (b) are shown in entire strain range, whereas (c) and (d) are up to 5 percent strain. Descriptions on the R-O fit and associated R-O parameters are given in Table 1.
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Comparison of FE J values based on incremental plasticity using actual stress-strain data with those based on deformation plasticity using the proposed R-O fits. Descriptions on the R-O fit and associated R-O parameters can be found in Table 1.
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Relations of σ0.2u and n for various hardening materials: (a)n from true stress-strain data and (b)n from engineering stress-strain data
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True stress-strain data for three materials, the Type 304 stainless steel at 50°C, the Type 316 stainless steel at 296°C and the carbon steel at room temperature
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Comparison of FE J values based on incremental plasticity using actual stress-strain data with those based on deformation plasticity using R-O fits, for the type 304 stainless steel at 50°C. Descriptions on the R-O fit and associated R-O parameters can be found in Table 1.

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