(Solved):   Required information A part is loaded with a combination of bending, axial, and torsio ...

 

Required information A part is loaded with a combination of bending, axial, and torsional stresses such that the following stresses are created at a particular location: Bending: Completely reversed, with a maximum stress of \( 58 \mathrm{MPa} \) Axial: Constant stress of \( 17 \mathrm{MPa} \) Torsion: Repeated load, varying from \( 0 \mathrm{MPa} \) to \( 59 \mathrm{MPa} \) Assume the varying stresses are in phase with each other. The part contains a notch such that \( K_{f \text {, bending }}=1.4, K_{f \text {;axial }}= \) 1.1, and \( K_{f \text { torsion }}=2.0 \). The material properties are \( S_{y}=300 \mathrm{MPa} \) and \( S_{U}=400 \mathrm{MPa} \). The completely adjusted endurance limit is found to be \( S_{e}=200 \mathrm{MPa} \). Determine the alternating and midrange stresses for all three types of stresses. For torsional stress, \( I_{\text {mean }}=\quad \) MPa and \( T_{a} \) alternating \( =\quad \) MPa. The value of the mean stress is MPa. The value of the alternating stress is MPa. The factor of safety against fatigue is The factor of safety against yielding is