What Is the Contact Patch Between a 0.5 mm Radius and a 3 mm Diameter Ball?

[Ranger Mike]

TL;DR

Contact area between diameter and a radius

Hello friends!
What is the contact patch between a radius of 0.5 mm (0.020”) and a 3 mm (0.125”) diameter ball?
All i can find is that it it a Point. And points have location not dimensions.

 

[jrmichler]

Search Hertzian contact stress to find out how the radii, modulus of elasticity, and contact force affect internal stress and contact area.

 

[Ranger Mike]

got it...and the answer!
thank you