共固化穿孔纤维增强阻尼薄膜结构(CCPFRDFE)是一种大阻尼、高层间结合性能的新型阻尼处理模式,在空天技术、尖端武器、快速交通等领域具有广阔的应用前景。但复杂的结构为其力学性能的研究增加了难度,未知的力学性能限制了该新结构的开发与应用。介绍了CCPFRDFE的制作工艺,建立了CCPFRDFE有限元模型,并搭建实验平台对有限元模型进行了验证。利用有限元模型,分别研究了纤维增强阻尼层穿孔孔径、孔距和阻尼材料厚度对CCPFRDFE面内等效弹性参数的影响规律。结果表明,增加穿孔孔径、减小孔距、增加阻尼层厚度有利于提高CCPFRDFE面内等效剪切模量,但不利于提高面内等效弹性模量。所得结果将为非连续阻尼薄复合材料的振动特性研究与大挠度设计奠定基础。
Co-cured composite with perforated fiber reinforced damping film embedded (CCPFRDFE) is a new method to treat damping material with large damping and high interlayer bonding performance,which has broad application prospects in aerospace technology,cutting-edge weapons,rapid transportation and other fields.However,its complex structure increases the difficulty for the research of its mechanical properties,and the unknown mechanical properties limit the development and application of this new structure.In this paper,the fabrication process of CCPFRDFE was introduced,the finite element model of CCPFRDFE was established,and two experimental platforms were built to verify the finite element model.Using the finite element model,the effects of the hole diameter,hole spacing and damping layer thickness of the damping layer on the in-plane equivalent shear and elastic modulus of CCPFRDFE were investigated.The results showed that increasing the hole diameter,decreasing the hole spacing and increasing the thickness of damping layer were beneficial for improving the in-plane shear modulus of CCPFRDFE,but were not conducive to improving the in-plane equivalent elastic modulus.The obtained results lay a foundation for the vibration characterization study and large deflection design of discontinuous CCPFRDFE.
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基金资助
国家自然科学基金面上项目(52075280):山东省自然科学基金(ZR2019MEE088)
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