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Realization of Higher-Mode Deformation of Beams Using Shape Memory Alloy Wires and Piezoceramics

In this study, shape memory alloy wires and piezoceramic actuators were employed in order to generate higher modes on the beam deformations without intermediate supporting points. Compressive force was generated and applied to the beam by the prestrained shape memory alloy wires attached at both ends of the beam. The piezoceramic actuators applied concentrated moments to several locations on the beam. Combinations of the compressive force and concentrated moments were investigated in order to understand the higher-mode deformation of cantilevered and simply supported beams. The first mode shape was obtained by applying heat to the shape memory alloy wires so that the wires generated and applied a compressive force to the beam. First and third mode shapes of deformation of the cantilever beam have been generated as well as first and second modes of the simply supported beam.