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Question: a schematic of a clutchtesting machine is shown the steel...

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A schematic of a clutch-testing machine is shown. The steel shaft rotates at a constant speed. An axial load is applied to the shaft and is cycled from zero to P. The torque Tinduced by the clutch face onto the shaft is given by fPD +d) 4 T= where Dand d are defined in the figure and fis the coefficient of friction of the clutch face. The shaft is machined with Sy 120 kpsi and Sut= 145 kpsi. The theoretical stress-concentration factors for the fillet are 3.0 and 1.8 for the axial and torsional loading, respectively. Assuming the load variation Pis cycled between 5 kips and 25 kips and that it is rotating synchronous with the external load cycle, estimate the number of cycles to failure. Use the modified Goodman fatigue failure criteria. Consider f 0.3, with a factor of safety of 3. R-0.1 ind-1.2 in Friction pad D-6 inWhat is the number of cycles to failure for this part? he number of cycles to failure for this part is

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