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| Electromechanical coupling model and interlaminar stress analysis of piezoelectric smart composite laminated beams |
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Abstract Graphene nanosheets (GPL) are considered to be one of the most attractive reinforcement materials for composites due to their extraordinary physical properties. GPL reinforced materials can significantly improve the properties of piezoelectric and mechanical for polyvinylidene fluoride (PVDF). Under the action of electromechanical loading, it is crucial to predict the interlaminar stress of laminated beams containing uniform graphene sheets reinforced (GPRC) smart piezoelectric composites. If the prediction of interlaminar shear deformation of piezoelectric laminated beams subjected to electromechanical coupling and the material properties vary widely from layer to layer, the interlaminar stress may be too large which may lead to interlaminar failure. Therefore, an effective mechanoelectrical coupling model is proposed which satisfying the interlaminar continuity condition and suitable for analyzing such problems for the interlaminar stress analysis of composite laminated beams with GPRC actuators in this paper. Applying the Reissner mixed variation theorem (RMVT), the prediction of transverse shear stress considering the electromechanical coupling effect can be improved. The results obtained from three-dimensional (3D) elastic theory and selected model will be used to evaluate the performance of proposed beam model. In addition, the responses of displacements and stresses characteristics for composite laminated beams with GPRC actuators were systematically studied from the aspects of electromechanical load, the thickness of piezoelectric layer, graphene volume fraction and aspect ratio.
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Received: 14 July 2022
Published: 17 February 2023
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2023, Vol. 44 
