Can anyone give me the stiffness matrices for a bi-morph cantilever beam with piezoelectric patches?

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Iman Izadgoshasb

It depends on the material you like to choose. If you like to choose MIDE, you can find more info here at page 10:

http://info.mide.com/hubfs/ppa-piezo-product-datasheet.pdf?hsCtaTracking=b40269b7-eb42-4234-a7ae-d6b9bfa6f122%7C8b655dfb-a489-4b33-9a15-e1c5c381bb78

Mohsen Safaei

For an ideal piezoelectric bimorph, assuming a third order deflection equation for the cantilever beam, the equilibrium equation can be written as shown in attached. The first matrix is the stiffness matrix which is multiplied by the generalized coordinates vector.