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Showing 1 to 20 of 33 for “"laminated plates"”.
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Dynamic instability of composite laminated plates
Dynamic instability in a laminated composite plate is studied using the finite element technique. The governing equations are derived based on the first order shear deformation theory with a linear strain-displacement relationship. The regions of instability for the resulting set of coupled Mathieu …
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Flutter of laminated plates in supersonic flow
… for solving flutter problems of simply supported laminated plates using linear small deflection theory. The plate construction may be arbitrary as long as it satisfies the assumptions of linear small deflection theory. For such plates, the bending and extensional governing equations are coupled …
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Modeling and detection of delaminations in laminated plates
… primarily with the numerical 2D modeling of delaminated plates. In the first chapter, we present the Traction Boundary Element Method (TBEM) that is the tool we use to model scattering of waves by cracks in elastic media. A critical step in the TBEM is the evaluation of integrals with …
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Nonlinear analysis of composite laminated plates subjected to impact
Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Aeronautics and Astronautics, 1992.
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An analysis of interlaminar stresses in unsymmetrically laminated plates
… of interlaminar stresses within unsymmetrically laminated plates is presented. The focus of the study is upon the linear thermoelastic response of thin square laminated composite plates subjected to extensional, compressive, or thermal loading. Symmetric and unsymmetric 0/90, +45/-45, and 0/+45 …
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Response of Isotropic and Laminated Plates to Close Proximity Blast Loads
… In particular, simply supported isotropic and laminated composite plates are modeled using the commercial finite element code NASTRAN and the method of modal superposition. Both analysis procedures are used to quantify the linear transient response of such plates subject to uniform and patch …
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An Investigation to Detect Delamination in Composite Laminated Plates Under Dynamic Loading
… locating delamination in composite laminate plates under dynamic loading utilizing accelerometers during dynamic response as an alternative structural health monitoring method in composite structures. The test specimens were manufactured using unidirectional carbon fiber/epoxy creating 11 …
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Analytical Solutions for the Deformation of Anisotropic Elastic and Piezothermoelastic Laminated Plates
… deformations of an anisotropic, linear elastic laminated plate.The formulation admits any set of boundary conditions on the edges and long faces of the laminate. Each lamina may be generally anisotropic with as many as 21 independent elastic constants. The three dimensional governing …
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On vibration and stability problems of laminated plates and shells using shear deformation theories
… with the vibration and stability analyses of laminated plates and shells, using classical, first-order and third-order equivalent single-layer theories and the layer-wise theory of Reddy. Analytical solutions of these theories for natural frequencies and critical buckling loads of plates and …
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Interlaminar stress analysis of dropped-ply laminated plates and shells by a mixed method
… the linear analysis of interlaminar stresses in laminated composites, with special interest in laminates that contain terminated internal plies (dropped-ply laminates). Two models are derived, one for problems of generalized plane deformation and the other for the axisymmetric response of shells …
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Effect of Fatigue Cycle Loading Amplitude Tension-Tension on Composite Laminated Plates with Initial Delamination
… Loading Amplitude Tension-Tension on Composite Laminated Plates with Delamination</strong></p> <p>Composite materials provide many mechanical advantages; however, they are susceptible to failure or delamination due to impact, high concentrated stresses and fatigue produced by high loading and …
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The finite element analysis of laminated composites
Laminated plates with homogeneous isotropic layers in bending and extension were investigated by an analytical method.
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Vibration of laminated orthotropic composite plates and shells.
… solution techniques presented for composite plates and shells deal with either simply supported conditions or boundary conditions with at least a pair of opposite edges simply supported. In the present study, an alternative general approach, combining superposition and state space techniques …
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Free vibration and nonlinear transient analysis of imperfect laminated structures
… and nonlinear transient analysis of imperfect laminated structures with emphasis on computational methods for accurate and efficient analysis are studied. The evaluation of interlaminar stresses is also studied by approximating global displacements of laminated plates. Free vibration response …
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Delamination initiation in postbuckled dropped-ply laminates
… strength of dropped-ply, graphite-epoxy laminated plates for the delamination mode of failure is studied by analysis and corroborated with experiments. The nonlinear response of the test specimens is modeled by a geometrically nonlinear finite element analysis. The methodology for …
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Linear and nonlinear analyses of thick composite circular plates using the finite element method
A new finite element for circular plates based on Mindlin's shear-deformable plate theory is developed. Unlike conventional plate elements, these new elements may be stacked on top of one another to model laminated plates. The elements assure continuity of the displacements between the layers, but …
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Nonlinear finite element analysis of a laminated composite plate with nonuniform transient thermal loading
Metal plates are being replaced by lighter but equally strong laminated composite plates in order to improve efficiency and increase performance of aerospace vehicles. But because of the complex construction of laminated plates they are very difficult to analyze. Conventional thin plate theories …
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Static and free vibration analysis of advanced composites using shear-deformable rectangular plate finite elements
… and free vibration analysis of isotropic and laminated plates with thicknesses ranging from extremely thin to very thick are presented, along with a convergence study. The finite element results are compared with the exact plate theory solutions. Of the elements investigated, the modified …
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ΠΡΟΒΛΗΜΑΤΑ ΛΥΓΙΣΜΟΥ ΣΕ ΣΥΝΘΕΤΕΣ ΠΛΑΚΕΣ VON KARMAN
… OF BUCKLING PROBLEMS OF COMPOSITE VON KARMAN PLATES ARE EXAMINED ANDSOLVED. A' PROBLEM: AN ELECTRIC VON KARMAN PLATE IS BOUNDED WITH A RIGID SURFACE. WE ASSUME THAT THE ACTION OF THE ABOVE SUPPORT ON THE PLATE IS A MULTIVALUED NONMONOTONE FUNCTION. B' PROBLEM: WE CONSIDER A LAMINATED PLATE …
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Development and Applications of a Flat Triangular Element for Thin Laminated Shells
Finite element analysis of laminated shells using a three-noded flat triangular shell element is presented. The flat shell element is obtained by combining the Discrete Kirchhoff Theory (DKT) plate bending element and a membrane element similar to the Allman element, but derived from the Linear …
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