Special considerations in the modeling of induced strain actuator patches bonded to shell structures

Zaffir A. Chaudhry; Frederic Lalande; Craig A. Rogers

doi:10.1117/12.175217

6 May 1994 Special considerations in the modeling of induced strain actuator patches bonded to shell structures

Zaffir A. Chaudhry, Frederic Lalande, Craig A. Rogers

Proceedings Volume 2190, Smart Structures and Materials 1994: Smart Structures and Intelligent Systems; (1994) https://doi.org/10.1117/12.175217
Event: 1994 North American Conference on Smart Structures and Materials, 1994, Orlando, FL, United States

Abstract

Based on the thin-shell Donnel theory, a model to represent the action of discrete induced strain actuator patches bonded to the surface of a circular cylindrical shell has been developed. The model provides estimates of the curvature due to the out-of-phase actuation and the in-plane strains due to the in-phase actuation of the bonded actuator patches. The magnitudes of the induced curvature and the in-plane strain are found to be identical to those of plates; however, due to the cylindrical strain- displacement relations, the in-plane and out-of-plane displacements are coupled. Expressions for the equivalent forces and moments that represent the action of the actuator patches have been developed. Due to the curvature of the shell, the representation of the in-phase actuation with an equivalent in- plane line force applied along the edge of the actuator results in the application of erroneous rigid-body transverse forces. To avoid these rigid body forces, a method to represent the in-phase actuation with a system of self-equilibrating forces is proposed. The action of the actuator is then represented by an equivalent in-plane force and a transverse distributed pressure applied in the region of the actuator patch. Finite element verification of the proposed model is presented. The displacements due to the actual actuator actuation are compared with the proposed model, and very good agreement is found.

Citation Download Citation

Zaffir A. Chaudhry, Frederic Lalande, and Craig A. Rogers "Special considerations in the modeling of induced strain actuator patches bonded to shell structures", Proc. SPIE 2190, Smart Structures and Materials 1994: Smart Structures and Intelligent Systems, (6 May 1994); https://doi.org/10.1117/12.175217

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