Standard Stress Methods Doc: AA-SM-008

Revision: A

Contact Stresses Page: 1

D.1.0.0 REFERENCES

[1] W.C. Young R.G. Budynas - Roark's Formulas for Stress & Strain, 7th Edition, Table 14.1[2] OEM Proprietary Data[3] OEM Proprietary Data

D.2.0.0 CALCULATIONS

Roller Material: Steel

197190 MPa Modulus of Elasticity

0.30 Poisson's Ratio

Track Material: Titanium

110316 MPa Yong's Modulus

0.30 Poisson's Ratio

D = 25.40 mm Roller Diameterw = 25.40 mm Roller Effective Width

P = 31364 N Applied Load

C = 1.29E-05 #ADDIN?

p = 1235 N/mm

b = 1.02 mm #ADDIN?Width of Rectangular Contact Area

1551 MPa #ADDIN?Max. Compressive Stress

517 MPa #ADDIN?Max. Shear Stress at Depth of 0.4b (0.41 mm)below the Track Surface

E1 =

n1 =

E2 =

n2 =

Roller Load per Unit Length p = P/w

sC =

tS =

PP D

b

Track

Roller

Roller OuterRace Width

w

D

= (1 - n12) / E1 + (1 - n2

2) / E2

= 1.6(pDC)0.5

= 0.798(p / [DC])0.5

=sC / 3

Prepared by: R. Abbott Date: Jan 2008 Checked by:___________________Date:__________

Standard Stress Methods Doc: AA-SM-008

Revision: A

Contact Stresses Page: 2

D.3.0.0 ALLOWABLE STRESSES

From Ref. [3].

Prepared by: R. Abbott Date: Jan 2008 Checked by:___________________Date:__________