I'd like to simulate a rubber-like material. This material if deformed would experience a restoring force to its original shape, a bit like a school rubber ereaser.
I tried with a spring-mass system but the system become quickly instable, moreover it's computational expansive.
Doing some research I found out I could simulate this behaviour through finite element method If I understood well. The problem is I haven't got the right mathematical tools to understand this method.
So how would you face up to this problem? Resources, links, tutorials, papers are welcome.