Discussion Forum

Hi everyone,

I have been trying to model a basic piezoelectric compression model involving two domains. I have one block on top which represents a steel mass and another block on the bottom which is meant to model piezoelectric paper.

I am very new to using COMSOL and am currently having trouble getting the two blocks to connect. When I apply a boundary load to the piezoelectric paper block and perform a stationary study, it works just as intended. However, when I place the block on top (in the assembly) and apply a Continuity to both domains of the Identity Boundary Pair (the two touching faces), I can't seem to get a solution that converges. I also apply gravity to both objects and put a fixed constraint of the bottom face on the paper.

I can imagine this issue is likely due to the meshing as I am currently trying to use the Normal, Physics-controlled mesh. I wanted to try to build a User-controlled mesh in which the mesh gets finer when it is close to the point of contact for both objects. However, when ever I try to build a User-controlled mesh it never seems to work (the mesh is not physically displayed).

I can't imagine that the fix is too challenging, but I have been stuck on this problem for quite some time. If anyone has any suggestions or ideas, that would be greatly appreciated!