Investigation of buckling characteristics of cracked variable stiffness composite plates by an eXtended Ritz approach

2021 ◽  
Vol 163 ◽  
pp. 107750
Author(s):  
A. Milazzo ◽  
V. Oliveri
Keyword(s):  
Composite Plates ◽  
Variable Stiffness

Thermal buckling behaviour of variable stiffness laminated composite plates

2018 ◽  
Vol 16 ◽  
pp. 142-151 ◽  
Author(s):  
Ganapathi Manickam ◽  
Anirudh Bharath ◽  
Aditya Narayan Das ◽  
Anant Chandra ◽  
Pradyumna Barua
Keyword(s):  
Laminated Composite ◽  
Composite Plates ◽  
Variable Stiffness ◽  
Thermal Buckling ◽  
Laminated Composite Plates

Design considerations for variable stiffness, doubly curved composite plates

2020 ◽  
Vol 244 ◽  
pp. 112170 ◽  
Author(s):  
Matthew A. Thomas ◽  
Stephen R. Hallett ◽  
Paul M. Weaver
Keyword(s):  
Composite Plates ◽  
Variable Stiffness ◽  
Design Considerations ◽  
Doubly Curved

scholarly journals Variable Stiffness Composites: Optimal Design Studies

2020 ◽  
Vol 4 (2) ◽  
pp. 80
Author(s):  
Filipe Eduardo Correia Marques ◽  
Ana Filipa Santos da Mota ◽  
Maria Amélia Ramos Loja
Keyword(s):  
Research Work ◽  
Shear Deformation Theory ◽  
Composite Plates ◽  
Variable Stiffness ◽  
Design Studies ◽  
Fundamental Frequencies ◽  
Biaxial Load ◽  
Load Increase ◽  
Transverse Deflection

This research work has two main objectives, being the first related to the characterization of variable stiffness composite plates’ behavior by carrying out a comprehensive set of analyses. The second objective aims at obtaining the optimal fiber paths, hence the characteristic angles associated to its definition, that yield maximum fundamental frequencies, maximum critical buckling loads, or minimum transverse deflections, both for a single ply and for a three-ply variable stiffness composite. To these purposes one considered the use of the first order shear deformation theory in connection to an adaptive single objective method. From the optimization studies performed it was possible to conclude that significant behavior improvements may be achieved by using variable stiffness composites. Hence, for simply supported three-ply laminates which were the cases where a major impact can be observed, it was possible to obtain a maximum transverse deflection decrease of 11.26%, a fundamental frequency increase of 5.61%, and a buckling load increase of 51.13% and 58.01% for the uniaxial and biaxial load respectively.

Analysis of composite plates with variable stiffness using Galerkin Method

2007 ◽  
Vol 111 (1118) ◽  
pp. 247-255 ◽  
Author(s):  
E. Senocak ◽  
H. Tanriover
Keyword(s):  
Galerkin Method ◽  
Solution Process ◽  
Composite Plates ◽  
Variable Stiffness ◽  
Variable Coefficients ◽  
Collocation Technique ◽  
The Galerkin Method ◽  
Spatially Varying ◽  
Solution Methodology ◽  
Good Agreement

A solution methodology is developed to solve plane stress problem of composite plates with variable stiffness by using Galerkin technique and polynomials as trial functions. In the solution process, analytical computation has been done wherever it is possible, and analytical-numerical type approach has been made for all problems. The methodology is applied to two known case problems, composite plate with variable fibre content and laminated plate with spatially varying fibre orientations. The formulation of these problems results into coupled partial differential equations (with variable coefficients). The solutions of these equations are obtained using the polynomials as trial functions in the Galerkin method. The results are compared to that of Ritz and collocation technique published elsewhere. The method is found to determine closely both the displacements and the stresses with a few number of terms and in good agreement with other approximating methods. Computations on some examples show that, the method with the help of a symbolic math package is simple and efficient for solving these types of problems in engineering applications.

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