etagliabue

Hi @sergiopm23,

I would suggest implementing your rigid object in this way:
1) you create a node (let’s call it “RigidObj”), which contains a MechanicalObject with template Rigid3d. This MechanicalObject is composed of a single DOF, placed in correspondence of the barycenter of your object.
2) you create a child node of RigidObj (let’s call it…[Read more]

I don’t know what happened but my post was supposed to go here (I see the title of the post is the same).

Thanks for your reply @psomers! I’ll try that out.

Eleonora

Hi everyone,

I know this issue has been already closed but I have a related question. I am wondering if it would be possible to replicate the pygame example using the old SofaPython (thus, python2). As far as I understand, I could use pygame and pyopengl to create a separate OpenGL context, but I am not sure that I will be able to redirect a view…[Read more]

Hello @ma1991,

Not long ago, I attended an event where there was one of the developers of the SoftRobots plugin and we tried out a similar scene. We experienced the same issue: the scene works perfectly on Linux, but it’s not the same on OSX. We have been told that the issue might be the way graphics is handled on OSX, which may mess things up a…[Read more]

Hello @hkomninos,

I did some work on the comparison between FEBio and SOFA, in particular related to nonlinear constitutive laws (StVenant-Kirchhoff and Neo-Hookean). Based on my experience, it’s worth checking that you are using the same integration rule in SOFA and FEBio. Indeed, while SOFA always uses 1-point Gauss integration rule (to my…[Read more]

Hi @krewcunc,

Thank you for your reply.
Actually I have been a bit vague by calling it “beam”, indeed what I am trying to simulate is a parallelepiped (thus, beam-shaped) modelled with a TetrahedralCorotationalFEM (which does not implement plasticity, likewise the BeamFEM). I guess I’m just having some discretization/numerical issues, but in…[Read more]

Hi @jangirrishabh,

I’ve come across your post and I think you should have a look at this post. I think that either the AttachConstraint or the BilateralInteractionConstraint components could work for you.

I hope you’ll find it useful.
Eleonora

Hi @ypszilon and @hugo,

I have found this quite old topic and I wanted to ask if you’ve ever succeeded in comparing SOFA solutions with those of other softwares in the meanwhile.
I was indeed trying to simulate the same scenario mentioned above (3D linear elastic beam with gravity, fixed at one end) but results are not exactly as I expected. As…[Read more]

Hi all,

I know this thread is quite old, but I am facing the same problem you described here. Did you eventually find any way to solve it?

Thanks!
Eleonora

Hi guys,

I’ve just tried to install v17.12 again, and I do not have the freezing issue anymore (whereas the double clicking is still not fixed, but it’s a minor thing).

Thank you!
Eleonora

Hi Hugo,

Thanks for your suggestion. I’m still working on it, I’ll let you know if I solve the issue.
I have another question: can you confirm that the TetrahedralCorotationalFEMForceField assumes that my model has a linear elastic behaviour? Is there a way to use other constitutive models in SOFA?

Many thanks!
Eleonora

Hi there,

Both the breast and the probe are in mm.
However, if I use a Young modulus in MPa (~ 0.01), the breast does not behave as I expect (when deformed only by gravity). I will try to think about this measurement units issue and let you know if I make any progress.

Thank you again.
Eleonora

Hi Hugo,

Thank you for your answer. I tried the solution you posted and it works correctly. Anyway, if I replace the hemisphere with the breast mesh, SOFA crashes as soon as collision with the probe is detected. I tried to consider as collision model just the subset of the mesh lying close to the probe, and I tried some different models (at…[Read more]