Study on the influences of effective parameters on the fatigue life of welded joint between locomotive gearbox baracket and bogie using FE model verified by experimental results

Authors

1 M.S. Student, Engineering and High Tech. Department, Iran University of Industries and Mines, Tehran, Iran.

2 Assistant Prof., Faculty of Mech. Eng., K.N.Toosi University Technology, Tehran, Iran.

Abstract

In the driving system of trains locomotives, Gearbox bracket connects gearbox to the bogie frame. This baracket is a casting part which welded to the bogie frame and is connected to the gearbox. This part suffers the fluctuating stresses during the train paths in both go and return paths. In this paper, influences of effective parameters on fatigue life of this baracket were investigated. The length of welded lines, material and thickness of baracket are the effective parameters. The FE model in FE Safe software was developed to predict the fatigue life. Factorial design was used to design of experiments. Experiments were done according to designed procedure. Results showed that, weld length, thickness of baracket and material of baracket has greater effect on fatigue life respectively. Also, in the fair choice of parameters, fatigue life became 330440 cycles which is 30.45% more than the fatigue life for initial model of baracket.

Keywords

Main Subjects

References

[1] Luo RK, Gabbitas BL, Brickle BV (1996) Dynamic stress analysis of an open-shaped railway bogie frame. Eng Fail Anal 3(1): 53-64.
[2] Sun YQ, Dhanasekar M (2002) A dynamic model for the vertical interaction of the rail track and wagon system. Int J Solids Struct 39(5): 1337-1359.
[3] Zhang W, Wu P, Wu X, Zeng J (2006) An investigation into structural failures of chinese high-speed trains. Eng Fail Anal 13(3): 427-441.
[4] Desimone H, Beretta S (2006) Mechanisms of mixed mode fatigue crack propagation at rail butt-welds. Int J Fatigue 28(5-6): 635-642.
[5] Asadi Lari A, Kapoor A (2008) An investigation to the influence of bogie direction reversal on equalizing rail vehicle wheel wear. Wear 265(1-2): 65-71.
[6] Lučanin VJ, Simić GŽ, Milković DD, Ćuprić NL, Golubović SD (2010) Calculated and experimental analysis of cause of the appearance of cracks in the running bogie frame of diesel multiple units of Serbian railways. Eng Fail Anal 17(1): 236-248.
[7] Kim JS, Yoon HJ (2011) Structural behaviors of a GFRP composite bogie frame for urban subway trains under critical load conditions. Procedia Eng 10: 2375-2380.
[8] Fu D, Wang W, Dong L (2015) Analysis on the fatigue cracks in the bogie frame. Eng Fail Anal 58(1): 307-319.
[9] Li J, Wang J, Li X, Yang J, Wang H (2015) The experiment study for fatigue strength of bogie frame of Beijing subway vehicle under overload situation. TOMEJ 9: 260-265.
[10] Yang J, Yang M, Li X, Wang X (2015) Strength analysis and experiment of high speed railway gearbox bracket. TOMEJ 9: 266-270.
[11] China steel suppliers, Longhai special steel, Copyright Notice © 1999-2012, Steelgr.com.
[12] Database of Steel and Alloy (Marochnik) © 2003 – 2016, All rights reserved.
[13] Sorex Welding Co., Ltd. No.68, Ln 358, Sec. 2,Wenhua Rd., Rende Dist., Tainan City 717, Taiwan.
[14] NTN Corporation (2014) Bearing load calculation. In: Ball and roller bearings.
[15] Fe-safe documentation and user-manual, safe technology limited.
[16] Andreas steimel electric traction - motive power and energy supply: Basics and practical experience oldenbourg industrieverlag (2008) Chapter 6, Induction traction motors and their control.
[17] Gurney TR (1995) Thickness effect in ‘relatively thin welded joints’. The Welding Institute Abington Hall, Abington, Cambridge CB1 6AL.
[18] Mahendran M (1996) The modulus of elasticity of steel - is it 200 GPa. Thirteenth International Specialty Conference on Cold-Formed Steel Structures, Missouri S&T. Louis, Missouri 641-648.
[19] ZOLLERN Steel Profiles, ZOLLERN GmbH & Co. KG, Germany. www.zollern.com
[20] Budynas RG, Nisbett JK, Shigley JE (2011) Shigley's mechanical engineering design. McGraw-Hill, New York.
Journal of Solid and Fluid Mechanics
Volume 7, Issue 2
July and August 2017
Pages 27-43

Files

Share

How to cite

Statistics