Surface to surface contact between deformable and rigod parts
Surface to surface contact between deformable and rigod parts
(OP)
Hello everyone,
I have a contact problem between a rigid and a deformable surface.
I am using a kinematic algorithm, and a surface to surface contact. I am putting a normale pressure on the rigid surface so it can squeeze the deformable one, and it works finely for some steps while the pressure amplitude is increasing, but once the pressure is reaching the max, the rigid part began to bounce back with the deformable part a lot of time, so the displacements of the rigid and deformable parts are constantly going from negative to positive values.
I dont know how to explain this weird behavior, and I would like to know how to change the stiffness of the contact first and how to accept some penetration between the two bodies.
Please Help!
M.
I have a contact problem between a rigid and a deformable surface.
I am using a kinematic algorithm, and a surface to surface contact. I am putting a normale pressure on the rigid surface so it can squeeze the deformable one, and it works finely for some steps while the pressure amplitude is increasing, but once the pressure is reaching the max, the rigid part began to bounce back with the deformable part a lot of time, so the displacements of the rigid and deformable parts are constantly going from negative to positive values.
I dont know how to explain this weird behavior, and I would like to know how to change the stiffness of the contact first and how to accept some penetration between the two bodies.
Please Help!
M.





RE: Surface to surface contact between deformable and rigod parts
RE: Surface to surface contact between deformable and rigod parts
Here is a picture of my model, with the pressure applied to the impactor (the rigid part) on the top and on contact with the deformable part(the box).Lastly the box is on contact with some supports too. The model is meshed with shells elements.
RE: Surface to surface contact between deformable and rigod parts
RE: Surface to surface contact between deformable and rigod parts
You will find attached a 3D shot of my model.
Thanks!
RE: Surface to surface contact between deformable and rigod parts
As far as the contact control option goes, I have used it in one of my input decks, but I never checked to see if there were any warnings to say it did nothing.
RE: Surface to surface contact between deformable and rigod parts
If you can tell me, some details about such step (like the displacement value, the duration of the step) It would be great , I am trying on my own right now, but I am not confident enough that I will find the perfect set ups. The duration of the step where the pressure is applied on the rigid applicator, is 0.08s, with the pressure goes from 0 to 1MPa on 0.05s and stay monotonic till 0.08s.
M.
RE: Surface to surface contact between deformable and rigod parts
RE: Surface to surface contact between deformable and rigod parts
Have a good day.
M.
RE: Surface to surface contact between deformable and rigod parts
I dont understand these results, can you please help find the fluke?
RE: Surface to surface contact between deformable and rigod parts