Discussion Forum

Hi;

I am studying on thermo-mechanical simulation in Comsol 5.4 (licensed version). But I have some difficulty related to thin layer meshing and assigning solid boundary conditions especially. To make a true simulation, I have started with basic blocks. For example; assuming that there are three domains. The thicknesses of these three domains are 0.4 mm , 20 um and 0.4 mm, respectively. The domain with 20 um thickness is an adhesive layer and this adhesive layer bonds the other two domains to each other. Actually; I want to analyze mechanical behaviour of thin adhesive layer under temperature variations. The thin domain is a kind of adhesive (photopolymer). My study is time dependent, physics is thermal stress (multiphysics).

My questions are firstly related to thin layer meshing and solid boundary conditions. Do you suggest any method to mesh thin layer effectively? I have made free tetrahedral and after that refined thin layer. It is true?

For solid boundary conditions: the two boundaries of thin layer are “thin elastic layer”. In the settings, I have calculated only total spring constant. And I have made the bottom boundaries of other two domains “fixed constraint” to fix on a surface. Is that true?

My model is actually more complex as I said, but firstly I want to start with basic blocks.

Regards,