mechanical iris cloth problem

Question

I’m working on a mechanical iris.

What I want is a sort of rubber sleave/cover over the leaves of the mechanical iris so you can’t see the leaves.

I’m using a cloth simulation to get the mesh reacting on the leaves of the mechanical iris. Problem is that I can’t figure out the right setting for the cloth simulation, it doesn’t work properly in any option I tried.

• All the leaves are collisions

• On the sleave mesh I applied a cloth physic with this settings

Is there somebody who knows how to fix this problem or knows a other method do achieve the same result?

Answer 1

Here is a lazily modeled mockup because I can no longer find my first detailed model. It's a disc with Collision physics and a Shapekey that reduces the hole in the center. A torus with a Cloth physics overlaps it. There is a short animation that switches between the shape keys.

I've turned off Gravity, and increased the Shape > Shrinking Factor a little (it's not needed for this model but for the first one). Here is the initial state:

Then used the Rubber preset for the Cloth settings and ran the animation. (The presets are in the "hamburger menu" right next to the Cloth section.) And I've given the Cloth settings some Pressure to dampen the torus a bit and make it wobble less when the "iris" opens again.

Here's a test with the previous detailed model. It looked like as shown above in the question's first screenshot. The open/close mechanic made the cloth spin around.