Are my lithium niobate simulation results accurate?

[DapDunkerley]

My professor is having me look into lithium niobate and run some tests on it in comsol to do a pretest on an experiment. I do not know much about them, but the results I am getting from the analysis seems off from what it should be. I feel like I am missing a parameter or boundary condition.

The model is a 1 micrometer block of lithium niobate with a disk that is 50 nm across and 1 nm thick in the center of the face of one side of the block. The side opposite of the disk is the ground. I would think that the most stress would be right around the disk and gradually reduce towards the ground. I included some pictures and am hoping someone can help me make sense of it.

 

[BigJDubs]

It would help if you could provide a bit more information about the exact parameters and boundary conditions that you have set up in your simulation. It's also worth considering which type of analysis you are performing - is it a static solution, or a dynamic one? Depending on the type of analysis, there may be some additional parameters or boundary conditions that need to be considered. Additionally, it might be useful to run some test simulations with simpler geometries first, to make sure that the model is behaving as expected. This will help you spot any errors in the setup or potential numerical issues before you start running more complicated simulations.