Numerical analysis of deformation of a beam with thin piezoelectric actuators partially debonded and buckling

摘要

Deformation of a cantilever beam having thin piezoelectric actuators partially debonded and buckling is analyzed by using a linear mathematical model based on the Timoshenko beam theory. Effects of location and size of the debonding are investigated for passive and active extension and bending. The buckling of the actuators is considered by applying a constant force equal to the buckling load at the boundary between the debonded and the bonded regions. When the actuators are debonded at their edges, only the bonded regions contribute to the deformation of the beam but the debonded regions do not contribute at all. When the actuators are debonded in the middle, both the ends of which are keeping bonded, their performances are almost the same as those for perfectly bonded actuators irrespective of the location and size of the debonded region before the debonded region buckles. However, after it buckles, the performance deteriorates depending on the distance from the clamp and the size of the debonded region.