MME  Vol.3 No.1 , February 2013
Study of Stress Sources and Critical Stress Combinations for the Input Shaft of a Longitudinally Mounted Four Speed Automotive Automatic Transmission Model
ABSTRACT

In the present paper; two models of the input shaft for a Longitudinal Mounted four Speed Automotive Automatic Transmission for the first time were introduced to describe the input shaft critical loads. In the first model; the DC (Direct Clutch) connects two gears together. This gives no change in the set torque (the set output torque equal to the set input torque). In the second model; the ODB (Over Drive Brake) fixes one element of the planetary set. This is resulting, the gear set gives reduction ratio (the set output torque is not equal to the set input torque). So, the transmission input shaft is worked under two different working operating conditions of torque. Also, it is loaded by a two vertical loads which are coming from the turbine and planetary set loads respectively. They are shown that there are three critical combinations of forces (contact force, shear force, and normal force) applied on the input shaft. The critical forces can be possibility exist three types of cracks for the input shaft cross section they are: transverse (torsion stress), longitudinal (bending stress), and vertical (shear stress). The three cracks are studied in this article. The article considers three stress factors: shearing torsion stress, shear stress, and bending stress.


Cite this paper
N. Abdel-Halim, "Study of Stress Sources and Critical Stress Combinations for the Input Shaft of a Longitudinally Mounted Four Speed Automotive Automatic Transmission Model," Modern Mechanical Engineering, Vol. 3 No. 1, 2013, pp. 44-49. doi: 10.4236/mme.2013.31006.
References
[1]   H. Heisler, “Advanced Vehicle Technology,” 2nd Edition, 2002, pp. 117-123. doi:10.1016/B978-075065131-8/50006-3

[2]   P. M. Heldt, “Torque Converters or Transmissions,” 5th Edition, 1955, pp. 272-277.

[3]   E. O. A. Abd Elmaksoud, E. M. Rabeih, N. A. AbdelHalim and S. M. El Demerdash, “Investigation of Self Excited Torsional Vibrations for Different Configurations of Automotive Automatic Transmission Systems during the Engagement Period,” Ain Shams Journal of Mechanical Engineering (ASJME), Vol. 2 No. 1, 2010, ISSN: 1687-8612,

[4]   Y. Zhang and X. Chen, “Dynamic Modeling and Simulation of a Dual-Clutch Automated Lay-Shaft Transmission,” Journal of Mechanical Design, Vol. 127, No. 2, 2005, pp. 302-207.

[5]   B. P. Volfson, “Stress Sources and Critical Stress Combinations for Splined Shaft,” Journal of Mechanical Design, Vol. 104, No. 3, 1982, pp. 551-556. doi:10.1115/1.3256385

[6]   J.-D. Wu and J.-H. Lin, “Experimental Investigation of Active Vibration Control for Gear Set Shaft,” International Journal of Vehicle Noise and Vibration, Vol. 2, No. 1, 2006, pp. 1-16. doi:10.1504/IJVNV.2006.008523

 
 
Top