1. Shafts and Axels Shaft is a rotating member and it provides axis of rotation for gears, pulley, flywheels, cranks, sprockets. Axels are non rotating member, carries no torque and it is used to support rotating wheels.

2. Design should consider the following Deflection, Bending deflection, Torsional deflection. Slope at the bearings and shaft support elements, shear deflection due to transverse loading Stress and Strength Static and Fatigue Static Strength Fatigue Strength Reliability

3. Example of shafts

7. Connections to the shaft

8. For Large Torque

9. Method of connections, cont.

10. Geometric Constrains Deflections and slope Use Method of superposition for complicated loadings Torsional displacement

11. Strength Constraints Static Failure either based on Maximum shear theory or DET(Mises) Theory MSS

12. MSS, cont.

13. DET theory, Static

14. Fatigue design of shafts

15. Fatigue, cont.

16. Natural frequency of the shaft W individual attachment weigh deflection of the shaft at the attachment