There is a type of coupler called shape memory coupler, which expands in low temperatures then comes back to its original state (contracts) in normal temperatures. This is used in connecting two pipes together.
I've been asked to create an animation of this coupler "expanding and contracting". I can create parts but I haven't animated much. I only know rotations, explode animations.
I tried searching a lot but couldn't find anything. Any leads on this? Any help would be appreciated.
(attached file shows a basic ring (coupling) that I want to expand and then contract using motion study)