This study analyses eccentrically stiffened sandwich thick plates with the core layer made of negative poisson material. The analytical method based on the first order shear deformation theory (FSDT) is applied to analyse dynamic response and vibration of the plates. | VNU Journal of Science Mathematics Physics Vol. 37 No. 3 2021 109-118 Original Article Dynamic Analysis of Eccentrically Stiffened Sandwich Thick Plates with Auxetic Honeycomb Core and GPL-RC Face Layers under Blast Loading Vu Dinh Quang1 VNU University of Engineering and Technology 144 Xuan Thuy Cau Giay Hanoi Vietnam Received 19 June 2021 Revised 22 July 2021 Accepted 05 August 2021 Abstract This study analyses eccentrically stiffened sandwich thick plates with the core layer made of negative poisson material. The analytical method based on the first order shear deformation theory FSDT is applied to analyse dynamic response and vibration of the plates. The numerical results of the study have been compared with other studies to evaluate the reliability of the calculation. The analysis results of the nonlinear dynamic response and the vibration show that the elastic foundation and the graphene volume ratio positively impact the behavior of the plates. On the other hand imperfection and thermal environment have a negative effect on the behavior of sandwich plates. Research has also been performed to evaluate the effect of blast load axial load and shape on the dynamic response of the plate. Keywords Sandwich plates FSDT auxetic dynamic response vibration blast loads 1. Introduction Composite materials have been applied widely in advanced industries in the world such as aviation aerospace ship building machinery construction etc. because composite materials have got more unique advantages such as light weight high modulus of elasticity high heat-insulation high sound isolation than conventional metals. Composite materials are combined from two substances with different properties whereas homogeneous elasticity substances are attached together to improve mechanical behavior of materials. Recently the sandwich structures have been studied by many scientists. Sandwich structures combined with new materials are a matter of great interest. _ Corresponding author. Email .
