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.

Question

15-07-2024
Engineering

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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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