Design and Technology FATIGUE FAILURE ANALYSIS
For the given figure and loading condition, compute the factor of safety at points A and B
Given: The material is aluminium with a yield strength of 100 MPa and ultimate strength of 300 MPa. The tube length is 15 cm and the arm length is 20 cm. The tube outside diameter (OD) is 5 cm and inner diameter (ID) is 4 cm. The applied load F, varies from 1000 N to – 600 N.
Assumption: the load is dynamic and the assembly is at a temperature of 300 Celsius. The component should last until 6 x 107 cycles. The notch radius at the wall is 0.75 cm and the stress concentration factors for bending with Kt = 1.7 and for shear Kts = 1.35. Feel free to make any assumptions if you find the information is not sufficient. Justify your assumptions.
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