Guidance Needed On How to Correctly Add Piezoelectricity?

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Hello, I need help adding piezoelectricity to a MEMS simulation I made. I have the Solid Mechanics and the Electrostatics Physics options added, but when I go to add the Multiphysics it doesn't recognize the parts of the geometry with the electrostatics physics enabled. Essentially, everything is deselected and I cannot add anything to the piezoelectricity multiphysics tab.

I've included a few photos of what I currently have set-up (current should run through the proof mass and the thin wire on top of the springs). I cannot seem to include my file because it's too big and I don't know how to compress it to 5 MB. I'm using the license my university has and it's version 6.2 of COMSOL.



1 Reply Last Post Feb 17, 2025, 12:33 p.m. EST

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Posted: 5 days ago Feb 17, 2025, 12:33 p.m. EST

You need to add a Charge Conservation Piezoelectric node under Electrostatics and then select the piezoelectric material (only). Then verify that the piezoelectric material is selected under Multiphysics (I think it's automatic).

You need to add a Charge Conservation Piezoelectric node under Electrostatics and then select the piezoelectric material (only). Then verify that the piezoelectric material is selected under Multiphysics (I think it's automatic).

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