Effects of porosity on free vibration and nonlinear dynamic response of multi-layered functionally graded materials subjected to blast loads

• Main Author: Đỗ, Thị Thu Hà
• Other Authors: Tran, Quoc Quan
• Format: Theses and Dissertations
• Language: English
• Published: 2020
• Subjects: Infrastructure Engineering; Kỹ thuật cơ sở hạ tầng; Lý thuyết biến dạng; Porosity; Functionally graded sandwich plate; Blast loading; The third-order shear deformation theory; 621
• Online Access: http://repository.vnu.edu.vn/handle/VNU_123/93284
• Institution: Vietnam National University, Hanoi

The effects of porosity ratio on free vibration andnonlinear dynamic response of FGM sandwich plates with twoFGM face-sheets and a homogeneous core as ceramic resting on elastic foundationssubjected to blast load are investigated in this thesis by implementing the third-order shear deformation theory. Two types of porosity are proposed, namely evenly distributed porosity and unevenly distributed porosity. Assumption that the material properties of multi-layered FGM plate to be changed in the thickness direction accord with a simple-power law distribution with regard to the volume proportion of thecomponents. This study obtainsnumerical results by using the Galerkin method and fourth-order Runge-Kutta method illustrating the significant effects of porous fractions, geometrical parameters, the elastic foundation, blast loads on the nonlinear dynamic response of FGM sandwic h plates