Repeat Prob. 6–68, with the bar subject to a completely reversed torsional moment of 2000 lbf ∙ in.
Repeat Prob. 6–68, A 1 ½ -in-diameter hot-rolled steel bar has a 3/16 -in diameter hole drilled transversely through it. The bar is nonrotating and is subject to a completely reversed bending moment of M = 1500 lbf ∙ in the same plane as the axis of the transverse hole. The material has a mean tensile strength of 76 kpsi. Estimate the reliability. The size factor should be based on the gross size. Use Table A–16 for Kt.