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International Journal of Scientific and Engineering Research
ISSN Online 2229-5518
ISSN Print: 2229-5518 8    
Website: http://www.ijser.org
scirp IJSER >> Volume 2, Issue 8, August 2011
Optimization of shaft design under fatigue loading using Goodman method
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Deepan Marudachalam M.G, K.Kanthavel, R.Krishnaraj
Shaft, Fatigue, Goodman, Relief groove, Stress concentration, Fillet radii, Support
In this paper frequent failure of a shaft employed in a spinning machine is studied. Failure occurred at the vicinity of change in cross section of the shaft where a relief groove is present. Considering the drive system, forces and the torques acting on the shaft are determined using which the stresses occurring at the failure section are calculated. Stress analysis is also carried out by using finite element method (FEM) and the results are compared with the calculated values. Stress concentration factors at the failure cross section are calculated using least square method from which fatigue stress concentration factors are calculated. Endurance limit using Goodman's method, fatigue factor of safety and the theoretical no of cycles sustained by the shaft before failure is estimated. In conclusion it is seen that the increase in fillet radii of the shaft and change in the position of the support decreases the stress concentration factor, increase the endurance limit and fatigue factor of safety of the shaft.
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