P1 Ans: b) 42.0kip-in, -83.25kip-in, c) 51.61kip-in, -92.86kip-in. A 3.0in diameter solid circular shaft made of stainless steel is subjected to the simultaneous action of a torque T = 6.0 kip- ft, a tensile axial force P = 55.0kips, and an unknown bending moment M. The stainless steel has a yield strength of y = 36.0ksi, both in tension and compression. (a) in terms of the known T, P and the unknown M set up the T equation for the principal stresses, (b) with MSST determine the maximum value of the bending moment M so that the shaft does not fail by yielding, (c) with MDET determine the maximum value of the bending z moment M so that the shaft does not fail by yielding. T M M