[simonkb24]

Hi everybody, I am working in Ansys WB trying to solve a problem encountered during my thesis study and I'd really appreaciate any suggests about this. The problem is the following:

I am doing a static structural analysis, the model attached to this post is just representative of a more complex model, but for what concerns my issue we can focus on its schematic model. Indeed in the whole model I am analyzing the bending behavior of a certain material (I cannot say much more because of a non-disclosure agreement), but anyway under high loading conditions I have a non-convergent analysis due to highly distorted elements.

The upper volume, the big one, has a Young modulus of 17GPa, while the lower one has E=30MPa, both are linear isotropic materials. I fixed the upper surface of the upper volume while I applied a linear displacement (just along the vertical direction) on the lower surface of the lower volume, which is from 0 to the full thickness lower volume. I did this because I'd like to know how much I can compress this material in order to have a convergent solution.

I've tried different solutions:
- Refining the mesh
- Reducing the substeps
- Applying a Nonlinear Adaptive Region MeshvRefinement
( Large deflection option is set ON while weak springs are set OFF)

The problem I had is attached in figure 2. The 2 windows help to see the real deformation of the lower volume, while the upper volume is able to penetrate it. I cannot use a Contact Tool option due to an incompability with the Non linear adaptive mesh refinement.

What I'd like to know if: Is there any way to allow big deformation under high load, at least reducing the thichkness of the compressed volume almost to a zero lenght, without occurring such penetration? Or is any possibility to prevent this penetration?

Thanks so much for your time.

With Regards,
Simon