Answer Happy

A 1.25-in-diameter SAE 1045 CD specimen (see Table A-20) is loaded in compression and torsion. For the torsion shown, what value of P will cause failure, according to the Max Shear Stress failure criterion? A. 78 kip B. 83 kip C. 86 kip D. 89 kip E. None of the above 7 kip in Pl M P