Abstract
In this paper, a new type of composite gradient sandwich plate structure is proposed, which embeds the pre-strained shape memory alloy (SMA) into the surface layer and the core layer composed of epoxy resin and graphite-reinforced materials. In the core layer, graphite-reinforced material has a continuous gradient distribution along the thickness direction of the sandwich plate. Dynamic behavior of composite gradient sandwich plate in thermal environment is investigated. The equations of motion and frequency equation are derived based on the Reddy shear deformation theory and the constitutive equation for a composite sandwich plate, via the Hamilton principle. Some analytical study is depicted to provide an insight into the effects of volume fraction of material composition, gradient distribution of graphite in the core layer, and pre-strain of SMA in the surface layer on the dynamic behavior of a sandwich composite plate. This study investigates the modal performance of a sandwich composite plate with two aspects, a gradient core layer of graphite-reinforced material and surface layer-embedded SMA wires, which provide a new design idea for dynamic behavior of sandwich plates.
Highlights
Shape memory alloy (SMA) has various applied beneficial effects on the dynamic behavior of a plate structure due to unique material properties, especially for recovery stress characteristics and operational temperature dependence [1]
The modal performance results in this study provide a theoretical basis and design concept for vibration control of a gradient sandwich composite plate with embedded SMA
The second example is vibration analysis of a thermally hybrid composite sandwich plate, which was equipped with SMA fibers in the graphite-epoxy face sheets
Summary
Shape memory alloy (SMA) has various applied beneficial effects on the dynamic behavior of a plate structure due to unique material properties, especially for recovery stress characteristics and operational temperature dependence [1]. Through embedded SMA wire in the surface sheets and unconventional design of the core layer, the modal performance of a composite sandwich plate can be synthetically adjusted in two aspects; the surface layer and the core layer This design concept has gradually become a new trend in the development of sandwich plates, which provides a research foundation for the avoidance of resonance and dynamic behavior control of sandwich plates. Analyzed the thermal vibration of a double curved sandwich panel with embedded pre-strained SMA wires hybrid composite face sheets and a soft core. Free vibration analysis of functionally gradient sandwich composite plate embedded SMA wires in the surface layer was investigated.
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