| Citation: | WANG Libo, HU Xiaoyue, DAI Zhihan, et al. Study on the bending properties of composite sandwich sheets embedded with magnetorheological elastomer smart grids[J]. Journal of Aerospace Power, 2024, 39（12）：20220435 doi: 10.13224/j.cnki.jasp.20220435
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The bending properties of composite sandwich sheets embedded with magnetorheological elastomer smart grid units were theoretically and experimentally investigated. A model was proposed to predict the bending characteristics of such sandwich sheets using the first-order shear deformation theory, energy technique, minimal potential energy principle, and the orthogonal polynomial methodology. After the total strain energy was obtained, the governing equation of the structure was deduced. As a result, the elastic bending deformation of such a sheet under the cantilever boundary subjected to the linearly distributed load can be successfully solved. When the preparation work of the upper and lower panels and the magnetorheological elastomer grid functional core was completed, the structural bending deformation was tested at different magnetic induction amplitudes and magnetic field control regions, based on an established test platform of such a specimen. The verification results showed that the maximum calculation error of the theoretical model did not exceed 8.2%, which was within an allowable error range. Hence, this model is trustworthy to predict the bending characteristics of such composite sandwich structures. It was also found that with the increase of the internal magnetic field amplitude and the number of magnetic field control regions, the structural bending resistance can be further improved by about 15%—21%.
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