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http://dx.doi.org/10.3795/KSME-A.2013.37.4.521

Element and Crack Geometry Sensitivities of Finite Element Analysis Results of Linear Elastic Stress Intensity Factor for Surface Cracked Straight Pipes  

Ryu, Dongil (Dept. of Mechanical Engineering, Korea Univ.)
Bae, Kyung-Dong (Dept. of Mechanical Engineering, Korea Univ.)
Je, Jin-Ho (Dept. of Mechanical Engineering, Korea Univ.)
An, Joong-Hyok (Hyundai Heavy Industries)
Kim, Yun-Jae (Dept. of Mechanical Engineering, Korea Univ.)
Song, Tae-Kwang (Korea Institute of Nuclear Safety)
Kim, Yong-Beum (Korea Institute of Nuclear Safety)
Publication Information
Transactions of the Korean Society of Mechanical Engineers A / v.37, no.4, 2013 , pp. 521-527 More about this Journal
Abstract
This study provides the elastic stress intensity factors, K, for circumferential and longitudinal surface cracked straight pipes under single or combined loads of internal pressure, bending, and torsion based on three-dimensional (3D) finite element (FE) analyses. FE results are compared with two different types of defect assessment codes (API-579-1 and RCC-MR A16) to prove the accuracy of the FE results and the differences between the codes. Through the 3D FE analysis, it is found that the stress intensity factors are sensitive to the number of elements, which they were believed to not be sensitive to because of path independence. Differences were also found between the FE analysis results for crack defining methods and the results obtained by two different types of defect assessment codes.
Keywords
Straight Pipe; Stress Intensity Factor; Surface Crack; Finite Element Analysis;
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