9 Contact Stresses

TABLE 9-2 Formulas for Contact Stresses 443
2d.
Cylinders crossed at right angles
3.
Barrel in a circular race
4a.
Rigid knife edge on surface of
semi-infinite plate line load q
a = 0.909na(FKγ) 1/3
b = 0.909nb(FKγ) 1/3
σc = 0.579nc[F/(K 2 γ 2 )] 1/3
d = 0.825nd(F 2 γ 2 /K ) 1/3
K = D1 D2
D1+D2
A = 1 D2
Barrels
a = 1.145na(FKγ) 1/3
b = 1.145nb(FKγ) 1/3
σc = 0.365nc[F/(K 2 γ 2 )] 1/3
d = 0.655nd(F 2 γ 2 /K ) 1/3
1
K = 1
R +
1 1 R +
2 1 R −
3 1
R4 A = 1 1R2 2 − 1
R4
Other Contact Areas
σc = σr = 2q
πr cos(α + θ)
σθ = τrθ = 0
B = 1 D1
B = 1 1R1 2 + 1
R3