Connecting rods, fatigue analysis of universal tractor via finite element method by using ANSYS

Subject Areas : New Finding in Agriculture

S. A. Mireei ¹ (Ph. D. student of Agricultural Machinery, Tehran University, Tehran, Iran)
M. Omid ² (Tehran University, Tehran, Iran)
A. Jafari ³ (Tehran University, Tehran, Iran)

Received: 2015-12-11 Accepted : 2015-12-11 Published : 2006-10-23

Keywords: Finite Element, Fatigue, simulation, Longevity, Connecting rod,

Abstract :

At the present research the connecting rod of universal tractor (U650) was simulated using ANSYS software and with its fatigue analysis, longevity after a 1000000-cycle load, was assessed. The goal of the investigation was analyzing connecting rod behavior against repetitive loads for fatigue phenomena. The results not only save cost and time but also optimize design process. By sophisticated analysis, critical nodes which probability of crack growth is more were finding. Results show that the critical point of crack growth obtained with 26.793 Mpa .This point in both tensile and compression test shows critical attitude. With fully reversed loading condition, load fluctuation cycle is about 108 so that with less stress concentration factor, it could be increase. The results obtained from the present paper can be used to bring up modifications in connecting rod manufacturing.

References:

1-Alfred Hancq, D. (2001) Fatigue analysis using ANSYS, ANSYS Inc.

2- ANSYS. (2001) “ANSYS user guide” Version 5.4, ANSYS Inc.

3- Artamonov, M. D., Ilarionov, V. A. and Morin, M. M.(1976) Motor vehicles, Mir Publisher, Moscow.

4- Augugliaro, G. and Biancolini, M. E. (2003) Optimization of fatigue performance of titanium connecting rod, SAE technical paper 980800, pp 1-3.

5- Beretta, S., Blarasin, A., Endo, M., Giunti, T. and Murakami, Y. (1997) Defect tolerant design of automotive components, Int. J. Fatigue, 19(40):319-333.

6- Biancolini, M. E., Brutti, C., Pennestrì, E. and Valentini, P. P. (2003) Dynamic, mechanical efficiency and fatigue analysis of the double cardan homokinetic joint, Int. J. of Vehicle Design,. 33 (1):47-65.

7- Internet Web Site, www.carrilloind.com/story.htm1

8- Lo, S. H. R. and Bevan, A. (2002) Fatigue analysis of a plate-with-a-hole specimen and a truck exhaust bracket using computer-based approach, Int. Jou. Eng. Sim. (IJES), 4(2).

9- Rabb, R. (1996) Fatigue failure of a connecting rod, engineering failure analysis, 3(1):13-28.

10- Repgen, B. (2001) Optimized connecting rods to enable higher engine performance and cost reduction, SAE technical paper 980882, pp. 1-5.

11- Shigley, J. E. and Mischke, C. R. (2001) Mechanical engineering design, chapter7, McGraw-Hill, New York.

12- Whittaker, D. (2001) The competition for automotive connecting rod markets, Metal Powder Report, Vol. 56, No. 5, pp. 32-37.