Multi-sphere clumps penetrate wall

Submitted by MiRa on Wed, 04/02/2014 - 08:50

Hi everybody,

when setting up a computation, I am using the fix rigid command in order to generate L-shaped multi-sphere clumps.

My problem is that some of the clumps pentrate the CAD mesh and get stuck in the wall (cf. attachment). Does anyone know how what the problem could be?

Best regards,
MiRa

AttachmentSize
Image icon mesh_penetration.png641.49 KB

Forums:

MiRa | Thu, 05/22/2014 - 16:17

Thank you for the reply, Christoph.

I have had tried changing the time step already, which did not help. The (contact) stiffness is based on the Young's Modulus for steel for both the wall and the particles.

Could the CAD mesh cause problems? It was created using Autodesk Inventor, however you are recommending a meshing tool.

I know that the reasons for this behaviour can be manifold, so I am just wondering whether anyone else has had the same problem in the past.

kunzhang's picture

kunzhang | Fri, 05/23/2014 - 18:38

Hi Mira,

Probably, you might check the initial postion of your particles. The insert position and veloctiy probably cause your particles penetrate and be stuck in the wall.

Kun

kunzhang

lperezpozo's picture

lperezpozo | Fri, 12/05/2014 - 22:21

Hi Mira, I subject the same that Kun. I wasted a entire day triyng to solve a similar problem =).

Luis.

Luis

--
Dr. Luis Pérez Pozo
Department of Mechanical Engineering
UTFSM, Chile
www.lpp.usm.cl

ckloss's picture

ckloss | Fri, 12/12/2014 - 16:01

Hi MiRa,

I would simplify the case you're running as much as possible (until it shows correct behavior)
and then check step by step which level of complexity causes the problem!

Best wishes
Christoph