(Solved): A shaft with a shoulder fillet shown below is made from a material Sut =470Mpa,Sy=390 Mpa. It has di ...

A shaft with a shoulder fillet shown below is made from a material Sut

Mpa. It has dimension

, and

. The shaft is ground. Estimate the safety factor with respect to infinite fatigue life for the shaft of a reliability of

using Goodman and Gerber failure criteria for the following loading conditions. Need to check yield on

cycle. The shaft is rotating and is subjected to a steady torque of

with a steady bending moment of

. Assume fatigue stress concentration factor

,

. The shaft is rotating and is subjected to a completely reversed torque of

in phase with a completely reversed bending moment of

. Assume fatigue stress concentration factor

. The shaft is nonrotating and is subjected to a torque fluctuating from 20 to

and a steady bending moment of

. Assume fatigue stress concentration factor

. The shaft is nonrotating and is subjected to a repeated torque varying from 0 to 120 N m , in phase with a completely reversed bending moment of

and a steady axial force of 500 N . Assume fatigue stress concentration factor

and

.