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http://dx.doi.org/10.3795/KSME-A.2016.40.11.979

Experimental Investigation on Torsional Analysis and Fracture of Tripod Shaft for High-speed Train  

Lee, Joo Hong (Reliability Assessment Center, Korea Institute of Machinery & Materials)
Kim, Do Sik (Reliability Assessment Center, Korea Institute of Machinery & Materials)
Nam, Tae Yeon (Reliability Assessment Center, Korea Institute of Machinery & Materials)
Lee, Tae Young (KATEM)
Cho, Hae Yong (Dept. of Mechanical Eng., Chungbuk Nat'l Univ.)
Publication Information
Transactions of the Korean Society of Mechanical Engineers A / v.40, no.11, 2016 , pp. 979-986 More about this Journal
Abstract
The tripod shafts of constant-velocity joint are used in both the trains KTX and KTX-sanchon. It is an important component that connects the motor reduction unit and the axle reduction unit in a power bogie. The tripod shaft not only transmits drive and brake torque in the rotational direction, but also slides in the axial direction. If the drive system is loaded with an excessive torque, the fuse part of the shaft will be fractured firstly to protect the other important components. In this study, a rig was developed for conducting torsion tests on the tripod shaft, which is a type of mechanical fuse. The tripod shafts were subjected to torsional fracture test and torsional fatigue test on the rig. The weak zone of the tripod shaft was identified, and its fatigue life was predicted using finite element analysis (FEA). After analyzing the FEA results, design solutions were proposed to improve the strength and fatigue life of the tripod shaft. Furthermore, the deterioration trend and time for failure of the tripod shaft were verified using the hysteresis loops which had been changed with the advancement of the torsional fatigue test.
Keywords
Tripod Shaft; Fatigue Life; Torsional Fatigue; Hysteresis Loop; Torsional Fracture;
Citations & Related Records
Times Cited By KSCI : 6  (Citation Analysis)
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1 Lee, J. H., Kang, B. S., Rye, H. S., Lee, J. M. and Cho, H. Y., 2016, "Development Test of Flexible PTO Shaft Used by Ti Alloy for Aircraft," Trans. Korean Soc. Mech. Eng. A, Vol. 40, No. 8, pp. 759-765.   DOI
2 Kim, S. S., Kim, Y. G., Kim, K. H. and Park, C. S., 2007, "Torque Measurement of Tripod Shaft for HSR-350x," Journal of the Korean Society for Railway, Vol. 10, No. 6, pp. 660-664.
3 Lee, D. H., Kwon, S. J., Park, B. S., Cho, D. Y. and Kim, J. W., 2013, "Development of Condition Monitoring System for Reduction Unit of Highspeed Rail," J. Korean Soc. Precis. Eng., Vol. 30, No. 7, pp. 667-672.   DOI
4 Jung, D. W., Choi, N. S. and Park, S. H., 2009, "S-N Curve Deduction of a KTX High-Speed Train Structure for an Accelerated Life Testing," Trans. Korean Soc. Mech. Eng. A, Vol. 33, No. 4, pp. 388-395.   DOI
5 Ji, H. Y., Lee, K. H., Kim, J. C., Lee, D. H. and Moon, K. H., 2013, "Fault Diagnosis of a Highspeed Railway Reduction Unit Using Analysis of Vibration Characteristics," Journal of the Korean Society for Railway, Vol. 10, No. 6, pp. 26-31.
6 Lee, C. W. and Lee, D. H., 2012, "Fatigue Life Evaluation of Motor Block Bracket Units for KTXSancheon Trains," Journal of the Korean Society for Precision Engineering, Vol. 29, No. 6, pp. 626-631.   DOI
7 Ko, J. B., Kim, W. K. and Won, J. H., 2005, "The effect on Fatigue Strength of Induction Hardened Carbon Steel," Transactions of the Korean Society of Machine Tool Engineers, Vol. 14, No. 6, pp. 83-87.
8 Korea Railroad Research Institute, 2014, Development of Condition Monitoring System for Reduction Unit of High Speed Trains, pp. 45-47.
9 Korea Railroad Research Institute, 2013, Development of Technology for Localization and Performance Enhancing of Existing Railway Coreparts, pp. 45-50.
10 ASTM E606/E606M-12, 2012, "Standard Test Method for Strain-Controlled Fatigue Testing," ASTM International
11 Novovic, D., Dewes, R. C., Aspinwall, D. K., Voice, W. and Bowen, P., 2004, "The Effect of Machined Topography and Integrity on Fatigue Life," International Journal of Machine Tools & Manufacture, Vol. 44, pp. 125-134.   DOI
12 Cheong, S. K., Lee, S. H. and Chung, S. C., 2001, "Effect of the Peening Intensity by Shot Peening," Trans. Korean Soc. Mech. Eng. A, Vol. 25, No. 10, pp. 1590-1596.   DOI
13 Yeom, H. H., Lee, M. G., Lee, C. M. and Jeon, Y. H., 2013, "Effect of Surface Treatment on Fatigue Strength of SCM440H," Journal of the Korean Society for Precision Engineering, Vol. 30, No. 8, pp. 779-784.   DOI