Explicit-contact

[fembig]

Hello,

I try to simulate simple contact models in explicit solver.
My model:

1. Rigid flat surface(400*400 mm). Solid cube (100*100*100) drops(with 4000 mm/sec) on rigid surface. I have specified general contact. In my case dropping solid does not make any contact with rigid surface and it simply passes thru it. More or less same model is available in abaqus example file. But i could not find what is the mistake i did in specifying contact(interaction).

Any one can help.Thanks in advance.

regards,

fembig

 

[bassmanjax]

Check the surface normal on the rigid surface - does it point toward the block? You can check this in Viewer.

I assume you also have *CONTACT INCLUSIONS, ALL EXTERIOR in the step?

Regards

Martin

Martin Stokes CEng MIMechE

 

[fembig]

Martin,

Thanks for your help.

I am using CAE. How to check surface normal and modify it. I am searching help, no success so far.

fembig

 

[bassmanjax]

Not sure actually, as I don't use CAE as a pre-processor.

In Viewer / Visualisation module you can plot the normals from "Options > Common > Normals" then check Show Normals and select on Surfaces.

If the normal is the wrong way, I'm sure there is a method for flipping it back the other way in the Interaction module.

Regards

Martin

Martin Stokes CEng MIMechE

 

[fembig]

Thanks. I could see normal direction. But, It points towards the block. Block bottom surface normals also points towards the rigid surface.

So, normal direction is ok. What else could be wrong?

fembig

 

[bassmanjax]

Hmmm, not sure I can say without looking at the model. Could you post the CAE file on a file sharing site?

Regards

Martin

Martin Stokes CEng MIMechE

 

[fembig]

Martin,

thanks for your help. It worked fine in other system. I got a result what i wanted to see(jumping of solid block after hitting rigid deck.

Seems to be some bug in abaqus installation or other mistakes (by me), which i have to find yet.

Regards,

fembig