highly distorted elements 1

[vinsce]

Hello !!

I need some advice concerning a problem of distorted elements that happens after a plastic/rubber contact (using conta174 and targe170). The geometry deals with 2 plates. The element used is solid187 with non linear activation. I refined the mesh at the contact interface.
I applied a non excessive load (100N) on the top plate and blocked the 4 lines of the bottom plate.

When I launch the calculation I have a problem that indicates "one or more elements have become highly distorted". If you need further information to answer my question, you can ask me whatever you need.

If someone has any idea to help me...

Thank you.

 

[ansysfreak]

Hi

Try using the Solid285 this is a more suitable element for this type of problems.

 

[vinsce]

Thanks for the proposal,

Unfortunately it still doesn't work. When I apply a little load (1N) on the top plate, the solution converges but when I rise the effort, an error message appears "one or more elements are highly distorted"... I tried to change the material properties and refine the mesh but it didn't solve the problem...

Is there a kind of meshing more suitable for this kind of problem ?? (quadrilateral, triangles...)

 

[ansysfreak]

Hi
The tetra element should behave better under these conditions.
Maybe you can try to use the STABILIZE command?

 

[jiligeo]

Hi, you can also try with:
finer element
lower value of FKN,
more substeps,
active the nropt, unsym
consider the deformation instead of the external load

hope that helps

 

[vinsce]

There's nothing to do... really difficult to solve my problems.

I hope somebody else could help me.

Thanks...

 

[jiligeo]

Please check your contact elements. Maybe you have some nodes at you contact and target surfaces, which are merged with each other. You can cheek that with these commands:

Esel, s, type, , 2 ( contact element)
Nsle
Esln
eplot