The following items from your example are clearly missing from my code:
If I just add them in I now get an error on loading the…[Read more]
No specific warnings are shown in the console. The MacOS crash dump report that appears shows the stack location as:
Thread 0 Crashed:: Dispatch queue: com.apple.main-thread[Read more]
0 libSofaMiscFem.19.06.99.dylib 0x000000010117fe2c…
Here is the code with the commented-out previous force-field and the new one. I’ve put the calculations in as you typed them, so hopefully they are correct. The Young’s Modulus and Poisson Ratio I had been using I had arrived upon through trial and error.
young_modulus = 2[Read more]
poisson_ratio = 0.35
Many thanks for your suggestion.
I have tried replacing my force-field with this, based on your XML:
pouch.createObject(‘TetrahedronHyperelasticityFEMForceField’, name = “FEM”,
ParameterSet = “3448.2759 31034.483”,
AnisotropyDirections = “0 1 0”,
materialName = “StVenantKirchhoff”)
However on a “Step” in…[Read more]
In case it’s helpful all my current experimental files are here:
I tried changing from “large” to “small” and that caused over-expansion of the structure with almost no deformation of the rectangular perimeter.
Hi Hugo, many thanks for your reply.
The material I had in mind would be similar to the outer material of the inflatable kayak I have from Decathlon! For example: Decathlon Inflatable Kayak.
The idea was to have a flat envelope-like rectangular pouch which when inflated would take on a cylindrical shape. For the most part this works well but I…[Read more]
Hi, what combination of Poisson Ratio and Young’s Modulus would you recommend for simulating a flexible but inelastic fabric?
Are there other parameters for the TetrahedronFEMForceField that would also be recommended?
In my experiments it always seems as though the material is stretching and so not quite what I’m after.
The image doesn’t show in my browser for some reason, this is the link:
Hi, my end-goal is to simulate pneumatic artificial muscles, for example Series Pouch Motors. I’ve been experiencing issues with my own scenes and the various combinations of parameters so thought today I would go back to basics and try to understand the supplied examples with the SoftRobots plugin.
However I quickly managed to get a similar…[Read more]
As my actual objective is to build simulations of inflatable objects I tried out a scene linked to from a recently active thread on that subject (sources here: https://github.com/ALFsarah/SOFA-cube-pneumatic-actuator).
The “Visual” part of the view filled the entire SOFA display window, but the “Behaviour” cube is shown down in the bottom-left…[Read more]
Hi, many thanks for the quick response.
With “runSofa -g qglviewer XYZ.pyscn” I get the same quarter-display. The only possibly relevant information in the stdout is:
The constructor with a QGLFormat is deprecated, use the regular contructor instead.
Within the GUI if I use the View menu to switch to OpenGL then the whole simulation window…[Read more]
When I run my own scene file only the bottom-left quarter of the display is used for the scene.
When I run “runSofa” with no arguments the demo snake model fills the entire window.
I am running on macOS Catalina on a 16″ MacBook with Retina screen. This is both with a pre-built version of SOFA and also one I’ve compiled from source on the same…[Read more]