Material calculations take hours?

Hi everyone! 

I'm making a simulation to study friction within a cable-driven robot. The robot body is made of PLA. I have a solid mesh and two contact conditions, but if I try to run a tenth of a second simulation without any sort of force constraint, it still takes hours. If it helps, I'm defining the material in a simple Elastic type (002). Is there any way to reduce this time? Because when I apply force, the time it takes is mostly the same, so it really seems like the software struggles with the materials

Thank you in advance