Dynamic Response of Adaptive Cross-Ply Cantilevers Featuring Interlaminar Bonding Imperfections

The implications of slip-type interfacial bonding imperfections on the dynamic behavior of adaptive laminated beams with surface-bonded piezoactuator layers are investigated. Numerical results are supplied, and pertinent conclusions on the free and forced flexural motions under transient distributed loadings, as a function of the measure of bonding imperfections, are outlined. Near the end of this problem approach, a recently developed theory of anisotropic laminated plates that incorporates the effect of imperfect interlaminae bondings and fulfils the shear traction continuity requirements is used. The control is achieved via the action of a piezoelectrically induced bending moment at the tip of the beam, and in this context four different feedback control laws are employed. The obtained results reveal the powerful role played by the proposed control methodology toward suppressing vibrations and attenuating the detrimental effect induced by the interlaminae bonding flaws.

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