Mean Stress and Vibrations in Torsion-Bar

A splined torsion-shaft, Fig. 5.52, 2 diameter is subjected to a constant torque M,= 180 KN. The material is high strength carbon steel heat treated to 1,200 MPa ultimate strength and 313 MPa fatigue limit xyin completely reversed torsion. Service experience indicates continuous untimely failures along section A-A in correspondence of a shoulder fillet of radius p — 2 mm. 

In the previous consideration it has not been taken into account the notch effect that will be discussed in Chap. 7. Considering that effect the life would be further reduced. 

5 Stress-Based Fatigue Analysis High Cycle Fatigue 

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Mean Stress and Vibrations in Torsion-Bar Helical Spring... 

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