Active Control of Geometrically Non-linear Transient Response of Smart Laminated Composite Plate Integrated with AFC Actuator and PVDF Sensor

Jnl of Sandwich Structures & Materials

Dehengia

et al. 2015

In this article, the free vibration behavior of functionally graded carbon nanotube reinforced composite plate is investigated under elevated thermal environment. The carbon nanotube reinforced composite plate has been modeled mathematically using higher order shear deformation theory. The material properties of carbon nanotube reinforced composite plate are assumed to be temperature dependent and graded in the thickness direction using different grading rules. The effective material properties of the functionally graded plate are introduced in the present model through a micromechanical model under temperature load. The governing differential equation of the functionally graded carbon nanotube reinforced composite plate is obtained using Hamilton’s principle. The domain is discretized using the suitable isoparametric finite element steps and solved numerically through a computer code developed in MATLAB environment. The validity and the convergence behavior of the present numerical results have been checked and a simulation model is also developed in commercial finite element package (ANSYS) using ANSYS parametric design language code. The effect of various geometrical parameters (aspect ratios, support conditions, and thickness ratios), the grading effect, and the temperature variation on the free vibration behavior of functionally graded carbon nanotube reinforced composite are examined and discussed in detail.

Section: Introductionmentioning

confidence: 99%

Vibration analysis of functionally graded carbon nanotube reinforced composite plate in thermal environment

Mehar

Jnl of Sandwich Structures & Materials

Dehengia

et al. 2015

“…where the subscript 'i' represents 'a' and 's' for the actuator and sensor, respectively. Substituting the equations (12) and (13) the above equation can be rewritten as…”

Section: Constitutive Relationsmentioning

confidence: 99%

“…Dynamic behaviour of laminated composite embedded with lead zirconate titanate (PZT) patches is analysed by Lee and Ng 10 and Sunar and Al-Bedoor 11 using FEM. The linear and nonlinear dynamic characteristic of laminated composite structure with surface bonded smart material is investigated using the linear and nonlinear FE models based on the first order shear deformation theory (FSDT) 12 and the HSDT 13 in conjunction with layerwise and/or single layer theory approximation. Mateescu et al 14 investigated the dynamic characteristic of smart damaged structure subjected to aerodynamic loading.…”

Section: Introductionmentioning

confidence: 99%

Numerical and experimental nonlinear dynamic response reduction of smart composite curved structure using collocation and non-collocation configuration

Singh

Hirwani

Proceedings of the Institution of Mechanical Engineers, Part C:

et al. 2018

In this work, a generic geometrical nonlinear mathematical model of smart composite curved shell panels has been developed for the evaluation of the linear and nonlinear dynamic responses. Further, the dynamic deflections are reduced by employing the piezoelectric material with the parent composite using two different arrangements (sensor and actuator). The current layered structure model is developed based on the higher-order mid-plane kinematics including the stretching effect. The electric potential due to the piezoelectric material included via a quadratic function of thickness for the current combined electro-elastic modeling. The geometrical distortion of the smart shell panel structure accounted via Green-Lagrange strain field including all of the nonlinear higher-order terms. The desired responses are evaluated computationally using an original computer code (MATLAB environment) with the help of the current higher-order model and finite element steps. The nonlinear dynamic deflection values are obtained through the direct iterative method in conjunction with Newmark’s integration. Additionally, the accuracy of the proposed model is demonstrated via comparison study with the available published literature with and without electric field potential. The reduction of response frequencies is also compared with the in-house experimental data. Lastly, few more numerical examples are computed for the various geometrical parameter including the shell configuration and the comprehensive behaviour of the currently developed nonlinear numerical model for the analysis of smart layered structure discussed in details.

“…Mehrabadi et al examined the buckling performance of the functionally graded CNTRC plate through the FODT‐based mathematical model. Further, Kerur and Ghosh employ the FODT mid‐plane kinematics to active control of the geometrically nonlinear transient response of laminated composite plate. Kamarian et al computed the free vibration behavior of the hybrid laminated composite plate with CNT reinforcement using the GDQ method and FODT kinematics.…”

Section: Introductionmentioning

confidence: 99%

Thermal free vibration behavior of FG‐CNT reinforced sandwich curved panel using finite element method

Mehar

2017

Polymer Composites

In this article, the vibration characteristics of carbon nanotube reinforced sandwich curved shell panel are investigated under the elevated thermal environment. The sandwich panel component (face and core layer) properties are assumed to be temperature-dependent including various distribution of the carbon nanotube for the face sheets of the sandwich structure. The sandwich structural behavior has been modeled mathematically using the higher-order shear deformation theory. The governing differential equation of motion of the free vibrated sandwich panel is obtained using the classical Hamilton's principle and transformed to the set of algebraic form with the help of suitable finite element steps. Further, fundamental frequencies of the curved sandwich shell panel are obtained numerically by means of a generalized computer code developed in MATLAB with the help of the present higher-order mathematical model. The accuracy and the stability of the present numerical results have been checked through the proper convergence test. The model is again extended to work out the frequency responses for few more cases and compared with those available published results including the simulation responses (ANSYS). Finally, a wide variety of numerical examples have been solved for various design parameters (volume fraction of CNT, core to face thickness ratios, length to thickness ratios, aspect ratios, support conditions, curvature ratios, and types of grading) of CNT sandwich curved panel and underlined their effects in details under the uniform thermal load. POLYM. COM-POS., 00:000-000,