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Dynamic characteristics of piezoelectric shear deformable composite plates

机译：压电剪切变形复合板的动力特性

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摘要

Layered composites have attracted attention for their high specific stiffness, high specific strength, and application specific tailoring of their properties. It is also recognized that layered composites are prone to delamination failure in addition to other failure modes. Consideration of transverse shear on the deformation behavior of the composites is an important aspect in the study of delamination mode failure of such plates. In this paper, we consider the effects of including the transverse shear deformation on the vibration characteristics of layered piezoelectric composites. The formulation is based on the Raleigh-Ritz method using the beam characteristic functions. MATLAB based symbollic math tool box is used in evaluating th eintegrals resulting from the Raleigh Ritz approach. Various commonly occuring boundary conditions are discussed. Results are provided showing the effects of the shear deformation on the dynamics of layered laminated composites. The effects of laminate thickness, fiber orientation, and the plate aspect ratios on the free vibration characteristics of the composite laminates are given to demonstrate the methodology described.
机译：层状复合材料因其高的比刚度，高的比强度和其性能的特定应用而备受关注。还认识到，除了其他破坏模式之外，层状复合材料还易于分层破坏。考虑横向剪切对复合材料变形行为的影响是研究此类板层间脱模破坏的重要方面。在本文中，我们考虑了包括横向剪切变形对层状压电复合材料振动特性的影响。该公式基于使用光束特征函数的Raleigh-Ritz方法。基于MATLAB的符号数学工具箱用于评估由Raleigh Ritz方法得到的积分。讨论了各种常见的边界条件。提供的结果显示了剪切变形对层状层压复合材料动力学的影响。给出了层压板厚度，纤维取向和板纵横比对复合层压板自由振动特性的影响，以证明所描述的方法。

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