- 10 Distinguish Between Static Loading And Dynamic Loading 11 List Three Stages Of Development For A Fatigue Failure 1 (179.3 KiB) Viewed 20 times
10. Distinguish between static loading and dynamic loading. 11. List three stages of development for a fatigue failure. 12. True or False In a S-N diagram, the Y axis denotes fatigue strength and the x axis denotes number of cycles. Fatigue failure can occur after a certain number of cycles in a steel component if the applied stress exceeds the endurance limit of the material. 13. steel shouldered shaft has a tensile strength of 460 MPa and is required to sustain a maximum bending moment of 6000 Nm under cyclic loading. With a required safety factor of 2 on the endurance limit, determine suitable dimensions for the shaft if the shoulder is used as a bearing location. The following information is also given by inspection of bearing catalogue. r/D=0.01 and D/d = 1.1 The stress concentration factor, K.(bending) = 1.5 Useful formula: Endurance limit Allowable stress = Safety factor x Stress concentration factor K 15. A deep groove 6306 ball bearing is radially loaded with 5000 N and axially loaded with 3500 N. The rotational speed is 1450 rpm. Calculate the expected L10 life time for the bearing. P Q30