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http://dx.doi.org/10.3795/KSME-A.2010.34.9.1293

Behavior of Elastic and Plastic Limit Loads of Thinned Elbows Observed During Real-Scale Failure Test Under Combined Load  

Lee, Sung-Ho (Nuclear Power Laboratory, KEPCO Research Institute)
Lee, Jeong-Keun (Nuclear Power Laboratory, KEPCO Research Institute)
Park, Chi-Yong (Nuclear Power Laboratory, KEPCO Research Institute)
Publication Information
Transactions of the Korean Society of Mechanical Engineers A / v.34, no.9, 2010 , pp. 1293-1298 More about this Journal
Abstract
In most power plants, wall thinning in carbon-steel pipes due to flow-accelerated corrosion is one of the major aging phenomena, and it reduces the load-carrying capacity of the piping system. Various types of wall-thinning defects were manufactured in real-scale elbows, and monotonic in-plane bending tests were performed under internal pressure to evaluate the failure behavior of the elbows. In this paper, the behavior of elastic and plastic limit leads of locally thinned elbows in a real-scale failure test is presented. The loads determined on the basis of TES (twice elastic slope) were considered to be the limit loads of locally thinned elbows so that the integrity of the thinned elbows could be maintained, even when a small amount of plastic deformation might have occurred.
Keywords
Thinned Elbow; Real Scale Failure Test; OES Elastic Load; TES Plastic Load;
Citations & Related Records
Times Cited By KSCI : 1  (Citation Analysis)
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1 Lee, S. H, Park, C. Y. and Park, J. H., 2009, "Investigation of the Performance Based Structural Safety Factor of Elbows in Nuclear Power Plant," Trans. of KSME (A), Vol. 33, No. 8, pp. 826- 831.   DOI
2 Lee, S. H., Lee, J. K. and Park. J. H., 2007, "Failure Behavior of Thinned Elbows According to Circumferential Thinning Width and Position under Internal Pressure and In-Plane Bending", Trans. of the KPVP, Vol. 3, No. 1, pp. 74-80.
3 Chexal, B., Horowitz, J., Dooly, B., Millett, P., Wood, C. and Jones, R., 1998, "Flow Accelerated Corrosion in Power Plant," EPRI TR-106611-R2.
4 WANO, 2006, "Flow Accelerated Corrosion," Significant Event Report 2006-1.
5 INPO, 2006, "Flow Accelerated Corrosion," Engineering Program Guideline.
6 Kiefner, J. F. and Vieth, P. H., 1990, "New Method Corrects Criterion for Evaluating Corroded Pipe," Oil & Gas J., Vol. 32, pp. 56-59.
7 Deardorff, A. F. and Bush, S. H, 1990, "Development of ASME section XI criteria for erosion-corrosion thinning of carbon steel piping," PVP-Vol-186, NDEVol. 7, pp. 71-75.