Calculation of contact stress

Hertzian stress and subsurface stresses are calculated for point or line contact. The radii of curvature for two bodies can be given in two planes. An angle between the planes for body 1 and body 2 can be defined. The stresses for both bodies are the same for equal materials, for different materials they can differ. A demo version for windows is available here, it has the same inputs but provides additional graphics.
These online calculations are provided free of charge by MESYS AG. The software is tested and no errors are known, but there is no warranty for the correctness of the results and for the availability of the calculations. The usage is at own risk.

Body 1
First radius body 1	r₁₁	mm
Second radius body 1	r₁₂	mm
Body 2
First radius body 2	r₂₁	mm
Second radius body 2	r₂₂	mm
Effective length for line contact	L_eff	mm
Normal force	Fn	N
Youngs modulus body 1	E₁	MPa
Youngs modulus body 2	E₂	MPa
Poisson number body 1	ν₁
Poisson number body 2	ν₂
Angle between axes	α	°

First radius body 1	r₁₁	5.0000	mm
Second radius body 1	r₁₂	5.0000	mm
First radius body 2	r₂₁	5.0000	mm
Second radius body 2	r₂₂	5.0000	mm
Angle between planes for radii	α	0.00	°
Youngs modulus body 1	E₁	210000.00	MPa
Poisson number body 1	υ₁	0.30
Youngs modulus body 2	E₂	210000.00	MPa
Poisson number body 2	υ₂	0.30
Normal force	Fn	100.00	N
Hertzian stress	pH	3454.40	MPa
Major half axis of contact ellipse	a	0.1176	mm
Minor half axis of contact ellipse	b	0.1176	mm
Approach of both bodies	δ	0.0055	mm
Maximal shear stress body 1	τMax₁	1070.93	MPa
Depth for max. shear stress body 1	z(τMax₁)	0.0565	mm
Maximal octahedral shear stress body 1	τOctMax₁	1009.69	MPa
Maximal shear stress body 2	τMax₂	1070.93	MPa
Depth for max. shear stress body 2	z(τMax₂)	0.0565	mm
Maximal octahedral shear stress body 2	τOctMax₂	1009.69	MPa
Maximal orthogonal shear stress	τyz	738.86	MPa
Depth for max. orthogonal shear stress	z(τyz)	0.0413	mm