strain/displacement in simulation FEA

jelte_steur814

Since most polymers behave non-linearly in the elastic range, and most snap hooks etc are not force limited but geometrically defined. I'd love to see some changes/additions to the simulation.

at the moment i usually apply a force and then trial and error that force till I get the proper displacement of my snap. That sucks and should be easier...
the good thing about applying forces is that it will allow the geometry to move/displace in a natural way, in most FEM software displacement loads lock the rotation of a surface/line/set of point so it won't move naturally. therefore a 

However more importantly is that I'm used to looking at te Strain resulting from a displacement so the non-linear elasticity-modulus cancels out. is there a way to get strain results?

kind regards

Jelte

chris_gromek_onshape

Greetings Jelte,

Thank you for your suggestions on how we can improve Onshape Simulation.  Luckily, I have some good news: both displacement boundary conditions and expanded results metrics are on our list of near-term enhancements.

I understand your point regarding locked-vs-free degrees of freedom when applying a displacement constraint, and while I had wondered how many users would appreciate the difference, I am happy to know that at least one certainly will!  Luckily, strain results will be a straightforward addition.

Regarding the use case you described, non-linear behavior of hyperelastic materials will unfortunately remain out of reach for Onshape Simulation through the near-future.  Though surpassing linear relations and small deformation assumptions is a goal of ours, we will need to make improvements in other areas before tackling those issues.

Best Regards,
Chris Gromek

martin_kopplow

It's certainly more than one user! I happen to know another one. ;0)