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http://dx.doi.org/10.12989/scs.2022.43.1.001

Nonlinear dynamic analysis of porous functionally graded materials based on new third-order shear deformation theory  

Allah, Mohamed Janane (Hassan II University of Casablanca, National Higher School of Arts and Crafts (ENSAM CASABLANCA), AICSE Laboratory)
Timesli, Abdelaziz (Hassan II University of Casablanca, National Higher School of Arts and Crafts (ENSAM CASABLANCA), AICSE Laboratory)
Belaasilia, Youssef (Hassan II University of Casablanca, National Higher School of Arts and Crafts (ENSAM CASABLANCA), AICSE Laboratory)
Publication Information
Steel and Composite Structures / v.43, no.1, 2022 , pp. 1-17 More about this Journal
Abstract
The free and forced nonlinear dynamic behaviors of Porous Functionally Graded Material (PFGM) plates are examined by means of a High-Order Implicit Algorithm (HOIA). The formulation is developed using the Third-order Shear Deformation Theory (TSDT). Unlike previous works, the formulation is written without resorting to any homogenization technique neither rule of mixture nor considering FGM as a laminated composite, and the distribution of the porosity is assumed to be gradually variable through the thickness of the PFGM plates. Using the Hamilton principle, we establish the governing equations of motion. The Finite Element Method (FEM) is used to compute approximations of the resulting equations; FEM is adopted using a four-node quadrilateral finite element with seven Degrees Of Freedom (DOF) per node. Nonlinear equations are solved by a HOIA. The accuracy and the performance of the proposed approach are verified by presenting comparisons with literature results for vibration natural frequencies and dynamic response of PFGM plates under external loading. The influences of porosity volume fraction, porosity distribution, slenderness ratio and other parameters on the vibrations of PFGM plate are explored. The results demonstrate the significant impact of different physical and geometrical parameters on the vibration behavior of the PFGM plate.
Keywords
finite element method; free vibration; high-order implicit algorithm; nonlinear dynamics; porous functionally graded material;
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