Semi-Analytical Approach for Nonlinear Dynamic Response of Three-Dimensional Graphene Foams Reinforced Sandwich Panels with Complex Curvature and Auxetic Core in Thermal Environment

Chúng tôi vui mừng thông báo rằng PGS.TS Nguyễn Thị Phương và các đồng nghiệp đã xuất bản công trình có tựa đề “Semi-Analytical Approach for Nonlinear Dynamic Response of Three-Dimensional Graphene Foams Reinforced Sandwich Panels with Complex Curvature and Auxetic Core in Thermal Environment” trên tạp chí Mechanics of Composite Materials.

Tóm tắt:

A semi-analytical approach for nonlinear global dynamic buckling and vibrations of three-dimensional graphene foams (TDGrF) reinforced sandwich panels with complex curvature and auxetic core in thermal environment was reported. The combination of auxetic core and TDGrF reinforced coatings is a solution to improve the load-carrying capacity of the structures effectively. The panels were designed with different curvatures including cylindrical, parabolical, and sinusoidal panels. Governing equations were established by using the higher-order shear deformation theory with the geometric nonlinearities of von Kármán with foundation-panel interaction modeled by Pasternak’s elastic foundation model. An algorithm to solve the problem considered was formulated using the Lagrange function, Rayleigh dispassion function, and Euler–Lagrange functions. The motion equations obtained were solved by using the Runge–Kutta method, and the dynamic responses were achieved. Meanwhile, the explicit expressions of the fundamental frequency, and frequency-amplitude curve of the panels were represented. Numerical results validated the influences of the graphene mass fraction, foam coefficient, auxetic core, and graphene and foam distributions with different curvature types of panels on the nonlinear global dynamic buckling and vibrations of panels.