Calculate the fatigue stress concentration for a steelfillet

Calculate the fatigue stress concentration for a steelfilleted shaft that is loaded axially Given Data: Sut= 341 MPa D (for larger cross-section) = 44 mm d (for smaller cross-section) 40 mm r(fillet radius) 3 mm

Solution

Solution:-

D/d = 44/40 = 1.1

r/d = 3/40 = 0.075

For above values

K_t = 1.7      ( from graph)

Fatigue stress = K_t * calculated stress

Fatigue stress = 1.7 * 341

Fatigue stress = 579.7 MPa      Answer