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A part is loaded with a combination of bending, axial, and torsion loads resulting in the stresses below. Calculate the fatigue factor of safety base on Goodman fatigue criteria. Bending: completely reversed with maximum stress of 50 MPa . Axial: constant stress of 18 MPa Torsion: Mean stress of 25 MPa with an alternating stress that is 10% of the mean stress. The fatigue stress concentration factors are K_bending =1.4 K_xi=1.1 K_torsion =2.0 Material Properties are =200MPa y=300MPa =400MPa Submit your answer to 3 decimal places. The answer should be between 0 and 2.
Sagot :
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