Re: Electro statical actuation of a cantilever

Hi Christian,
I gave a quick look to your model.
In attachment you see your model with some modifications that seem right to me.
Unfortunately now I do not have enough time to post all the explanations.
In any case, keep in mind that:

1) GaAs is an insulator, while in order to have a good actuation (and therefore an higher displacement of your by-layer structure) mechanism you have to set some conductivity (due to dopant) in these materials.

2) I think that 1000V as highest voltage is a too high value for such a structure. You will have pull-in in these conditions. This may be the cause of "inverted element" warning.

3) I have set the force on the boundary "in front of" the gap and to the "upper" one (check your model to understand what I'm saying)

4) the Au counterelectrode do not need any physical displacement. I suppose it is fixed. If I'm right, you can save computational cost and time by setting a "zero displacement" as subdomain condition in the ale module.

I hope this help.

Hi,

Alessandro Ricci