scholarly journals The Dynamic Response and Vibration of Functionally Graded Carbon Nanotube-Reinforced Composite (FG-CNTRC) Truncated Conical Shells Resting on Elastic Foundations

Materials ◽  
2017 ◽  
Vol 10 (10) ◽  
pp. 1194 ◽  
Author(s):  
Duc Nguyen Dinh ◽  
Pham Nguyen
Keyword(s):  
Carbon Nanotube ◽  
Dynamic Response ◽  
Functionally Graded ◽  
Conical Shells ◽  
Elastic Foundations ◽  
Reinforced Composite

Nonlinear Vibration of Carbon Nanotube Reinforced Composite Truncated Conical Shells in Thermal Environment

2019 ◽  
Vol 19 (12) ◽  
pp. 1950158 ◽  
Author(s):  
Pham Dinh Nguyen ◽  
Vu Dinh Quang ◽  
Vu Thi Thuy Anh ◽  
Nguyen Dinh Duc
Keyword(s):  
Carbon Nanotube ◽  
Dynamic Response ◽  
Nonlinear Vibration ◽  
Thermal Environment ◽  
Equations Of Motion ◽  
Linear Functions ◽  
Geometrical Parameters ◽  
Conical Shells ◽  
Elastic Foundations ◽  
Reinforced Composite

This paper is concerned with the nonlinear vibration and dynamic response of carbon nanotube (CNT) reinforced composite truncated conical shells resting on elastic foundations in a thermal environment. The material properties of shells are assumed to be temperature-dependent and graded in the thickness direction according to various linear functions. The nonlinear equations of motion are expressed in the form of two-component deflection function and solved by the analytical method. Detailed studies for the influences of various types of distribution and volume fractions of CNTs, geometrical parameters, Winkler and Pasternak elastic foundations on the dynamic response and nonlinear vibration of CNT polymer composite truncated conical shells are examined and the comparison study is carried out to verify the accuracy and efficiency of the proposed method.

Active control of functionally graded carbon nanotube–reinforced composite plates with piezoelectric layers subjected to impact loading

2019 ◽  
Vol 26 (7-8) ◽  
pp. 581-598 ◽  
Author(s):  
Belal Ahmed Mohamed Mohamed Selim ◽  
Zishun Liu ◽  
Kim Meow Liew
Keyword(s):  
Carbon Nanotube ◽  
Dynamic Response ◽  
Active Control ◽  
Impact Loading ◽  
Passive Control ◽  
Composite Layer ◽  
Composite Plates ◽  
Functionally Graded ◽  
Reinforced Composite ◽  
Piezoelectric Layers

To the best of the authors’ knowledge, this is the first attempt in the open literature to study the active control of the dynamic response of functionally graded carbon nanotube–reinforced composite plates with piezoelectric layers, as target composite plates, subjected to impact loading. The theoretical formulation of the composite plates with piezoelectric layers is developed using the element-free improved moving least-squares Ritz model and the higher-order shear deformation theory. The effective material properties of the carbon nanotube–reinforced composite layer are estimated by the Mori–Tanaka method. The modified nonlinear Hertz contact law is used to identify the contact force between the target composite plates and the spherical impactor. The Newmark time integration method is utilized to calculate the resulting dynamic response. A constant velocity feedback controller is efficiently used for the active control of the dynamic response of the target plates subjected to impact loading. The results revealed that the current model can successfully reduce and suppress the resulting displacement caused by impact loading. Additionally, the effects of some passive configurations on the target plates’ dynamic response are presented. The effect of altering both active and passive control configurations together on the target plates’ dynamic response is discussed as well.

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