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piezoelectric direct effect
Posted Jul 7, 2010, 11:37 a.m. EDT 0 Replies
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I still cannot manage to simulate the effect of interdigitated electrodes on a piezoelectric structure.
I just simply want to bend it and measure the voltage across the electrodes, but
a) if I do not couple this problem with the electrical conductive one, I found a gradient of potential inside the electrode which is obviously nonsense.
b) if I perform such a multiphysics simulation I cannot leave any electrode floating: since the voltage is the dependent variable it must be defined somewhere inside the region, but this value is exactly what I am looking for!
c) For a close circuit configuration zero voltage is accepted but this means that a charge must appear on the electrode surface. Instead I get zero voltage, zero charge with a deformed structure which is completely nonsense for a piezoelectric material.
Anybody has suggestion about this? Is Comsol multiphysics only able to simulate the converse piezoelectric effect?
Best regards
Hello Andrea Mazzalai
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