Estimate the Marin loading factor kc for a 1–in-diameter bar that is used as follows.
(a) In bending. It is made of steel with Sut=100LN(1,0.035) kpsi, and the designer intends to use the correlation Sˊe=Φ0.30Sˉut to predict Sˊe .
(b) In bending, but endurance testing gave Sˊe=55LN(1,0.081) kpsi.
(c) In push-pull (axial) fatigue, Sut=LN(86.2,3.92)kpsi , and the designer intended to use the correlation Sˊe=Φ0.30Sˉut.
(d) In torsional fatigue. The material is cast iron, and Sˊe is known by test.