Noon Digital Resources
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Static, Dynamic, and Aeroelastic Behavior of Shape Memory Alloy Embedded Plates
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Abstract
AA novel concept proposed is the use of Shape Memory Alloy (SMA) to
reduce the plate thermal deflection and to delay the panel-flutter. SMA has
the unique ability of recovering large prestrain completely when the alloy
is heated. During the recovery process, a large tensile recovery stress
occurs if the SMA is restrained. In this paper, a panel subject to the
combined aerodynamic and thermal loading is investigated. A nonlinear finite
element model based on von Karman strain displacement relation is utilized
to study the effectiveness of an SMA embedded panel on the flutter boundary,
critical buckling temperature, post-buckling deflection, and free vibration.
The study is performed on an isotropic panel, with embedded SMA. The
aerodynamic model is based on the first order quasi-steady piston theory.
The dynamic pressure effect on the buckling and post-buckling behavior of
the panel is investigated by introducing the aerodynamic stiffness term,
which changes the critical buckling temperature. Panels with SMA embedded in
either longer or shorter direction and either fully or partially embedded
are investigated for post-buckling behavior. Similarly, the influence of
temperature elevation on the flutter boundary and vibration frequencies is
investigated.
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