The crankshaft in Figure P16.5 has a diameter d = 13.0 nun. Let a small-diameter hole be d...

The crankshaft in Figure P16.5 has a diameter d = 13.0 nun. Let a small-diameter hole be drilled in the crankshaft at a location 50 mm from the load P (measured along the axis of the shaft). Determine the magnitude of the completely reversed load P that can be cycled 108 times based on a factor of safety SF = 1.75. Assume that q = 1.00. Material properties are given in Problem 16.5.

A shaking mechanism of a machine has a crank shown in Figure P16.5. The crank is made of a stress-relieved cold-worked SAE .1040 steel (σu = 830 MPa, Y = 660 MPa, and σam = σL = 380 MPa). A completely reversed load P = 500 N is applied for up to 108 cycles to the crank pin, normal to the plane of the crank. Determine the diameter d of the shaft based on a factor of safety SF = 1.75 .using the octahedral shear-stress criterion of failure.

FIGURE P16.5