Active strain energy tuning of composite beams using shape memory alloy actuators

Ramesh Chandra

doi:10.1117/12.152765

8 September 1993 Active strain energy tuning of composite beams using shape memory alloy actuators

Ramesh Chandra

Proceedings Volume 1917, Smart Structures and Materials 1993: Smart Structures and Intelligent Systems; (1993) https://doi.org/10.1117/12.152765
Event: 1993 North American Conference on Smart Structures and Materials, 1993, Albuquerque, NM, United States

Abstract

This paper presents an analytical study on natural frequencies of rotating open-section composite beams with actuation by embedded shape memory alloy (SMA) fibers. The analysis includes the essential features of open-section composite beam modeling, such as constrained warping and transverse shear deformation. A general plate segment of the beam with and without SMA fiber-composite ply is modeled using laminated plate theory and the forces and displacement relations of this plate segment are then reduced to the force and displacement of the one-dimensional beam. The natural frequencies of rotating graphite-epoxy I-beams with SMA are calculated for different volume ratios of fibers. The feasibility of maintaining constant frequencies at different rotational speeds by SMA actuation is shown for composite I- beams.

Citation Download Citation

Ramesh Chandra "Active strain energy tuning of composite beams using shape memory alloy actuators", Proc. SPIE 1917, Smart Structures and Materials 1993: Smart Structures and Intelligent Systems, (8 September 1993); https://doi.org/10.1117/12.152765

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