Question

Your company is designing a part that will see a cyclically applied load, before calculating the number of cycles till failure you need to determine the endurance limit. Determine the endurance limit on the given loading, geometry, and material.

Given Data:

Sut = 500 MPa

Sy = 310 MPa

Operating temperature = 150 degrees C

Surface Finish: Ground

Specimen Rotating? No

Cross-section: Solid Circle

d = 40 mm

Reliability = 85%

Stresses	Min(MPa)	Max(MPa)	Mean(MPa)	Amp(MPa)
Axial	0	0	0	0
Bending	-20	10	-5	15
Torsion	-10	10	0	10
Von Mises	65.34	93.62	14.5	79.41

Answer 1