Repair of vibrating delaminated beam structures using piezoelectric patches

摘要

This research provides a closed-loop feedback control repair methodology for a vibrating delaminated beam structure by use of piezoelectric patches. The electromechanical characteristic of the piezoelectric material is employed to induce a local shear force above the delamination area via an external voltage, which is designed as a feedback of the deflection of the vibrating beam, to remove the stress singularity around the delamination tips. Moreover, the finite element method(FEM) is employed to verify the effectiveness of the proposed design and repair methodology for delaminated beams with various sizes and alignments of delaminations.