the diagram below shows a circula bar , made of AISI 1040 OQT 1300 steel (SU = 600 MPa), is loaded with an axial tensile loading P. Find the modified endurance strength (SE) and the modified fatigue strength (SF) for the bar if D = 36 mm, d = 30 mm, and r = 2.4 mm. Use the number of cycles to fracture to be 5 × 105. Assume that the surface finish factor, kf, is 0.85, the size factor, kS, is 0.85, and the notch sensitivity factor, qn, is 0.75. Use the following equations if needed,

Elements Of Electromagnetics
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Author:Sadiku, Matthew N. O.
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In the diagram below shows a circula bar , made of AISI 1040 OQT 1300 steel (SU = 600 MPa), is loaded with an axial tensile loading P. Find the modified endurance strength (SE) and the modified fatigue strength (SF) for the bar if D = 36 mm, d = 30 mm, and r = 2.4 mm. Use the number of cycles to
fracture to be 5 × 105. Assume that the surface finish factor, kf, is 0.85, the size factor, kS, is 0.85, and the notch sensitivity factor, qn, is 0.75. Use the following equations if needed,

Se = 0.45 Sy
&
S = 0.75 Sy
1
log
C = log
Se
bs
&
Кр — 1
Кс — 1
Sf = 10° Nbs
& qn =
P
D
Transcribed Image Text:Se = 0.45 Sy & S = 0.75 Sy 1 log C = log Se bs & Кр — 1 Кс — 1 Sf = 10° Nbs & qn = P D
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