Abstract
Plates are commonly used in many engineering disciplines, including aerospace. With the continuous improvement in the capacity of high value-added airplanes, large transport aircrafts, and fighter planes that have high strength, high toughness, and corrosion resistance have gradually become the development direction of airplane plate structure production and research. The strength and stability of metal plate structures can be improved by adding reinforced materials. This paper studies graphene platelets (GPLs) reinforced with a free vibration porous composite plate. The porous plate is constructed with a multi-layer model in a metal matrix containing uniform or non-uniformly distributed open-cell internal pores. Considering the random and directional arrangement of graphene platelets in the matrix, the elastic modulus of graphene composites was estimated using the Halpin–Tsai micromechanical model, and the vibration frequencies of graphene composite were calculated using the differential quadrature method. The effects of the total number of layers, GPL distribution pattern, porosity coefficient, GPL weight fraction, and boundary conditions on the free vibration frequency of GPLs reinforced porous composite plates are studied, and the accuracy of the conclusions are verified by the finite element software.
Highlights
Graphene is a material with one of the highest known strengths
The results show that the free vibration frequency converged monotonously, with an increase in the total number of layers, and the difference was between n = 12 and n = 100, which was less than 5.0%
The influences of the total number of layers, porous distribution patterns, graphene platelets (GPLs) distribution patterns, porosity coefficients, GPL weight fractions, and GPL shape and boundary conditions on the free vibration frequency of GPL reinforced porous composite were studied, and a simulation analysis was conducted using finite element software in order to verify the accuracy of the conclusion
Summary
The theoretical Young’s modulus of graphene is up to 1.0 TPa and it has an inherent tensile strength of 130 GPa. The morphology of graphene is similar to the lamellar structure of thin paper and the thickness of a single layer is only 0.335 nm. The morphology of graphene is similar to the lamellar structure of thin paper and the thickness of a single layer is only 0.335 nm It is the thinnest two-dimensional material presently known. A composite plate is made from a metal matrix plate, as a continuous phase, and has a sized graphene modifier as a dispersed phase. Graphene reinforced porous composite plates have a lighter weight, higher stiffness, higher strength, and multifunctional properties that can meet the lightweight requirements of the aerospace field and inject new vitality into the development of aerospace materials
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