scholarly journals Discrete Singular Convolution and Differential Quadrature Method for Buckling Analysis of Laminated Composite Plates

2016 ◽  
Vol 8 (4) ◽  
pp. 66-66 ◽  
Author(s):  
Kadir Mercan ◽  
İbrahim Aydoğdu ◽  
Ömer Civalek
Keyword(s):  
Differential Quadrature Method ◽  
Laminated Composite ◽  
Composite Plates ◽  
Buckling Analysis ◽  
Differential Quadrature ◽  
Quadrature Method ◽  
Laminated Composite Plates ◽  
Discrete Singular Convolution

Buckling Analysis of Ring-Stiffened Laminated Composite Cylindrical Shells by Fourier-Expansion Based Differential Quadrature Method

2012 ◽  
Vol 225 ◽  
pp. 207-212 ◽  
Author(s):  
Saeed Barani ◽  
Davood Poorveis ◽  
Shapoor Moradi
Keyword(s):  
Fourier Expansion ◽  
Differential Quadrature Method ◽  
Cylindrical Shells ◽  
Laminated Composite ◽  
Longitudinal Direction ◽  
Buckling Analysis ◽  
Differential Quadrature ◽  
Quadrature Method ◽  
First Order ◽  
Finite Element Software

This article focuses on the application of the Fourier-expansion based differential quadrature method (FDQM) for the buckling analysis of ring-stiffened composite laminated cylindrical shells. Displacements and rotations are expressed in terms of Fourier series expansions in longitudinal direction and their first order derivatives are approximated with FDQM in circumferential direction. The 'smeared stiffener' approach is adopted for the stiffeners modeling. Two FORTRAN programs prepared for linear and nonlinear analysis and results were compared by ABAQUS finite element software. Buckling loads of stiffened and unstiffened shells considering the effects of changes in shell and stiffener geometric and material properties and also shell lay-ups are investigated.

Multi-scale analysis of viscoelastic–viscoplastic laminated composite plates using generalized differential quadrature method

2012 ◽  
Vol 227 (7) ◽  
pp. 1406-1416 ◽  
Author(s):  
S Masoumi ◽  
M Akhlaghi ◽  
M Salehi
Keyword(s):  
Differential Quadrature Method ◽  
Laminated Composite ◽  
Composite Plates ◽  
Quadrature Method ◽  
Scale Analysis ◽  
Laminated Composite Plates ◽  
Multi Scale ◽  
The Matrix ◽  
Generalized Differential ◽  
Multi Scale Analysis

Multi-scale analysis of laminated composite plates with viscoelastic–viscoplastic behavior of matrix is studied. Simplified unit cell method is developed to derive a new formulation for analysis of composite materials, including viscoelastic–viscoplastic matrix. The viscoelastic behavior of the matrix is modeled using Boltzmann superposition principle and the creep compliance is modeled using Prony series. Zapas–Crissman functional model is applied to obtain viscoplastic behavior of the matrix. In structural level, equations of equilibrium of laminated composite plate in terms of displacements have been derived using first order shear deformation theory with von Karman kinematic nonlinearity type. The nonlinear equations of equilibrium of plate are solved using generalized differential quadrature method. The details of the multi-scale analysis process have been discussed. Results include the effect of different parameters on creep behavior of composite materials in microscale and also micro-macro analysis.

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