# Deformation of a rubber ball between planes

I want to know the shape of a rubber ball when it is sandwiched between two (not necessary parallel) plane.

If two plane is parallel, I think it is possible to approximate the ball as spheroid and determine the two parameters by using the constantness of its volume and distance of two plane. However, when the planes are not parallel, I don't know how the ball looks like.

I guess I need some parameters like elasticity, but I don't have much physical knowledge.

• Is the ball solid or hollow like a tennis ball? Hollow balls deform in more complex ways. Nov 3 '15 at 11:05
• The ball is solid.
– user97452
Nov 3 '15 at 11:10
• A spheroid is likely a very poor approximation, especially when you take into account contact areas and the deformation due to frictional forces for non-parallel plates. Nov 3 '15 at 11:12
• Mar 8 '18 at 13:46
• The deformation shape of a sphere is rather complex in general: youtube.com/watch?v=aMqM13EUSKw Mar 8 '18 at 14:20