Syt = Syc = 111kpsi(765Mpa)
Sut-t = Sut-c = 156kpsi(1080Mpa)
E = 30e6 ksi, ef = 0.14
Construct an S-N curve applicable for zero mean stress. Assume that the part is a solid circular rod that has a diameter of 1.0 inches, has a machined finish, operates at room temperature is subjected to a fully reversed bending streess and that the part requires a reliability of 50%. Sketch the S-N curve assuming a log-log scale labeling all signigicant points with values of Sf and N, giving the equations for the linear segments of the curve.