含MFC智能层的复合材料层合板自由振动研究
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TH113; TB123

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国家自然科学基金资助项目(11472056,11872127)


Free Vibration of Composite Laminated Plates with MFC Smart Layer
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    摘要:

    在一阶剪切变形板理论的基础上,提出一种考虑之子函数影响的位移场。根据给定的位移场,利用瑞利-里兹法和切比雪夫多项式,考虑机电耦合特性,分别求出含有智能压电宏观纤维复合材料层(macro fiber composite,简称MFC)的碳纤维增强复合材料层合悬臂板在开路与通路两种电学边界条件下自由振动的固有频率,讨论不同铺层方式、宽厚比、长宽比以及不同的外电压状态下,MFC智能层对碳纤维增强复合材料层合板固有频率的影响。研究结果表明,MFC智能层对所研究统的固有频率影响显著,可以通过控制MFC智能材料的通电电压来实现对复合材料层合板动特性的控制。

    Abstract:

    The cantilevered plate made from carbon fiber and macro fiber composite (MFC) is studied. First, a displacement field considering the influence of zigzag function is proposed based on the first-order shear deformation plate theory. The cantilever′s natural frequency is derived under the given displacement field using the Rayleigh Ritz method and Chebyshev polynomial. The evaluation covers the free vibration under an open circuit or controlled by different voltages taking into consideration the coupling between the elastic and electric fields. Then, the influence of stacking pattern, width-thickness ratio, and the length-width ratio of the MFC smart layer as well as the value of the external voltage on the natural frequency is investigated with different boundary conditions. The results show that the MFC smart layer has a significant effect on the natural frequency of the system and the vibration characteristics of composite laminates can be controlled by changing the power on the voltage of the MFC smart material.

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  • 在线发布日期: 2020-03-17
  • 出版日期: 2020-02-28
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