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Dynamic Stability Analysis of Porous Functionally Graded Microplates Using a Refined Isogeometric Approach by Quoc-Hoa Pham; Phu-Cuong Nguyen is a Engineering article available to read on EtoBox.

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This paper is devoted to analyzing dynamic stability behaviors of porous functionally graded (FG) microplates subjected to periodic uniaxial/biaxial in-plane compressions by utilizing a refined plate theory (RPT) in conjunction with modified couple stress theory (MCST) within isogeometric analysis (IGA) framework. In this setting, the displacement field of microplates is expressed based on four-variable RPT-based IGA, while the effects of microstructure could be thoroughly captured by employing MCST involving only one material length scale parameter. To define dynamic instability region boundaries, Bolotin’s method is adopted in the present work. Three different dispersions of internal porosities i.e. even, uneven, and logarithmic uneven through the thickness direction are investigated in detail. In addition, porosity-dependent material properties are estimated via a modified rule of mixture. A number of numerical investigations are carried out to study, for the first time, the influences of several key factors such as porosity coefficient and porosity distribution, material length scale, power law index, static and dynamic load factors on dynamic instability characteristics of FG

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Author

Quoc-Hoa Pham; Phu-Cuong Nguyen

Publisher

Elsevier BV

Published

2022

Language

EN

Field

Engineering (Physical Sciences)