STATIC DEFLECTION MODELING OF A PIEZOELECTRIC ACTUATED CANTILEVER COMPOSITE LAP JOINT BEAM

摘要

This work studies the use of surface bonded piezoelectric induced strain actuators and their effect on the static deflection of a single lap joint epoxy-fiber composite cantilever beam. Euler-Bernoulli beam theory was utilized to derive the elastic curves for pre-load and post-load actuation, accounting for changes in flexural rigidity of the beam. The model accounts for physical properties of the composite beam and piezoelectric, as well as the piezoelectric bond location. A numerical study aimed at evaluating the effectiveness of piezoelectric actuation based pre-load and post-load actuation, as well as bond region has been performed. Post-load actuation was found to be from 2.5% - 70% more effective than pre-load actuation, depending on the bond location. Bond Region I was found to be most effective for both pre-load and post-load actuation.