Non-linear flexural and dynamic response of CNT reinforced laminated composite plates

2013 ◽  
Vol 45 (1) ◽  
pp. 89-100 ◽  
Author(s):  
G. Bhardwaj ◽  
A.K. Upadhyay ◽  
R. Pandey ◽  
K.K. Shukla
Keyword(s):  
Dynamic Response ◽  
Laminated Composite ◽  
Composite Plates ◽  
Laminated Composite Plates ◽  
Non Linear

Non-linear response and buckling of imperfect laminated composite plates under in-plane pulse forces

2021 ◽  
pp. 095440622199639
Author(s):  
Rajesh Kumar ◽  
Vishal Singh ◽  
SN Patel ◽  
Tanish Dey
Keyword(s):  
Dynamic Response ◽  
Composite Plate ◽  
Failure Load ◽  
Laminated Composite ◽  
Composite Plates ◽  
Dynamic Buckling ◽  
Laminated Composite Plates ◽  
Laminated Composite Plate ◽  
Non Linear ◽  
Static Failure

This study presents a semi-analytical solution of the non-linear dynamic response, shock spectrum, and dynamic buckling of an imperfect angle-ply laminated composite plate under various types of in-plane pulse forces. The laminated composite plate is modeled using a higher-order shear deformation theory and von-Kármán geometric nonlinearity. The non-linear governing partial differential equations (PDEs) of imperfect laminated composite plates are derived via Hamilton’s principle. Using Galerkin’s method, the non-linear PDEs are transformed into non-linear algebraic equations for the static stability problems and non-linear ordinary differential equations for the dynamic problem such as dynamic response, shock spectrum, and dynamic buckling. The buckling load of the plate is obtained through the associated eigenvalue problem. The static failure load of the composite plate is evaluated using the post-buckling analysis based on the Tsai-Wu failure criterion. The dynamic response and shock spectrum of the composite plate are determined via Newmark’s method. The dynamic failure load of the plate is evaluated using Newmark’s method based on the Tsai-Wu failure criterion. Dynamic buckling is to be characterized by dynamic load factor (DLF), which is represented as the ratio of the dynamic failure load to the static failure load. Based on the pulse/shock duration time, the pulse forces are divided into three loading regimes known as impulsive, dynamic, and quasi-static. The study revealed that the DLF values are > 1, < 1, and [Formula: see text]1 respectively for the case of impulsive, dynamic, and quasi-static loading regimes of pulse force. The influences of various types of in-plane pulse forces, amplitude and time duration of pulse forces, and amplitude of initial geometric imperfections on the non-linear dynamic response, shock spectrum, and dynamic buckling behavior of the laminated composite plate are addressed in detail. The results will help in the appropriate design of the laminated composite plate against dynamic buckling.

scholarly journals Non-linear analysis on stability of corrugated cross-ply laminated composite plates

2006 ◽  
Vol 28 (4) ◽  
pp. 197-206
Author(s):  
Dao Huy Bich ◽  
Khuc Van Phu
Keyword(s):  
Laminated Composite ◽  
Composite Plates ◽  
Sine Wave ◽  
Laminated Composite Plates ◽  
Non Linear ◽  
Post Buckling ◽  
Corrugated Plates ◽  
The Stability ◽  
Analytical Expressions ◽  
Linear Stability Problem

In the present paper the governing equations for corrugated cross-ply laminated composite plates in the form of a sine wave are developed based on the Kirchoff-Love's theory and the extension of Seydel's technique. By using Bubnov-Galerkin method approximated analytical solutions to the non-linear stability problem of corrugated laminated composite plates subjected to biaxial loads are investigated. The post buckling load-deflection curve of corrugated plates and analytical expressions of the upper and lower buckling loads are presented. The effectiveness of corrugated plates in enhancing the stability compared with corresponding fiat plates is given.

Dynamic Response of Laminated Composite Plates

AIAA Journal ◽  
1975 ◽  
Vol 13 (10) ◽  
pp. 1259-1260 ◽  
Author(s):  
Chang-Tsan Sun ◽  
J.M. Whitney ◽  
L. Whitford
Keyword(s):  
Dynamic Response ◽  
Laminated Composite ◽  
Composite Plates ◽  
Laminated Composite Plates
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