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http://dx.doi.org/10.5762/KAIS.2016.17.12.686

Evaluation of a Back Face Strain Compliance of CT specimen  

Kim, Won Beom (Department of Naval Architecture and Ocean Engineering, Faculty of Mechanical Engineering, Ulsan College)
Publication Information
Journal of the Korea Academia-Industrial cooperation Society / v.17, no.12, 2016 , pp. 686-691 More about this Journal
Abstract
In welded steel structures, there are many stress concentration sites such as weld beads, and welding defects are likely to occur at the welded parts. When a repeated fatigue load acts on a stress concentration site, fatigue crack occurs and propagates, leading to fatigue fracture. Therefore, it is necessary to understand fatigue life, crack initiation life, and crack propagation life in order to prevent fatigue failure. In this study, a compliance method was derived for use in the study of fatigue crack propagation characteristics. This compliance can be used for automated measurement of fatigue cracks. The compliance was calculated using an in-house FEM program for a CT specimen. The results of this calculation are presented in relation to a/W and compared with calculation results using the J integral and a program from a previous study. In addition, the strain distribution in the upward and downward directions was calculated from the center of the back face of the CT specimen. In this distribution, the strain tended to decrease from the center to the top and bottom. The compliance method was achieved from these calculations and can be used for automatic execution of crack propagation tests.
Keywords
Fracture Mechanics; CT specimen; Back Face Strain; Compliance; Crack;
Citations & Related Records
Times Cited By KSCI : 3  (Citation Analysis)
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