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Showing 1 to 20 of 22 for “"shear-deformable"”.
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Dynamic stability of shear deformable viscoelastic composite plates
… structures exhibit weak rigidity in transverse shear, the associated governing equations account for the transverse shear deformations, as well as the transverse normal stress effect. The integro-differential equations governing the stability are solved for simply-supported boundary conditions …
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On the behavior of shear deformable plate elements
An investigation of the behavior of shear deformable plate finite elements is conducted to determine why and under what conditions these elements lock, or become overly stiff. For this purpose, a new analytical technique is developed to derive the exact form of the shear constraints which are …
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Dynamic analysis of composite beams using shear-deformable finite elements
"The goal of this effort is to develop shear-deformable finite elements which can be used to find the natural frequencies of composite beams. The first objective of the study is to derive the mass and stiffness matrices for the elements of interest and incorporate them into computer programs which …
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Vibration of a nonlinear shear deformable beam by numerical simulation
… vibration of a uniform geometrically nonlinear shear deformable beam subjected to a transverse harmonic excitation is investigated by the method of numerical simulation. Rotatory and axial inertia are included in the model. The beam is simply supported with supports a fixed distance apart. The …
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Nonlinear flutter of composite shear-deformable panels in a high-supersonic flow
… The structural model considers a higher-order shear deformation theory which also includes the effect of the transverse normal stress and satisfies the traction-free condition on both faces of the panel. The possibility of small initial imperfections and in-plane edge restraints are also …
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Static and free vibration analysis of advanced composites using shear-deformable rectangular plate finite elements
… finite elements based on a first order shear deformation plate theory and a refined higher order plate theory is presented. Special attention is given to the representation of transverse shear strain, the phenomenon of "shear locking", and the selection of the interpolating polynomial. …
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Aeroelastic Analysis of Rotor Blades Using Three Dimensional Flexible Multibody Dynamic Analysis
… A triangular element, based on the first order shear deformable theory, has been developed specifically for folded plate and shell structures. The plate element does not suffer from either shear or aspect-ratio locking under transverse and membrane bending, respectively. A stiffened plate …
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Dynamic Stability of Uncertain Laminated Beams Subjected to Subtangential Loads
… loads, using the dynamic criterion. Thus a shear-deformable laminated beam element, including warping effects, is derived to study the deterministic and probabilistic response of laminated beams. This twenty-one degrees of freedom element can be used for solving both static and dynamic …
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Linear and nonlinear analyses of thick composite circular plates using the finite element method
… 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 not …
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Special finite elements for modelling adhesively bonded joints in two- and three-dimensions
… such that the adherends were modelled by shear deformable plate elements, and the adhesive as a single solid element through the thickness. The degrees of freedom of both the plane elasticity ADH2D element and the solid ADH3D element are offset from their respective surfaces to the nodes …
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A study of vibrations in rotating laminated composite plates accounting for shear deformation and rotary inertia
A first-order shear deformation plate theory is used to predict free vibration frequencies in rotating laminated composite plates. The theory accounts for geometric non-linearity in the form of von Karman strains. The plate is permitted to have arbitrary orientation and offset from the axis of …
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Modal interactions in the dynamic response of isotropic and composite plates
Hamilton's principle and a third-order shear-deformation theory are used to derive a set of five coupled partial-differential equations governing the nonlinear response of composite plates. The reduction of these equations by using classical plate theory is discussed and the corresponding …
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Compressive failure of notched angle-ply composite laminates: three-dimensional finite element analysis and experiment
… a combination of the out-of-plane and in-plane shear stresses. Use of the state of stress directly on the hole edge in the prediction of laminate failure resulted in predictions of laminate ultimate strengths which were less than experimentally observed values by as much as a factor of ten. In …
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Nonlinear probabilistic finite element modeling of composite shells
… the full Green-Lagrange strains and first-order shear deformable kinematics, forms the modeling foundation. The first-order second-moment technique for probabilistic finite element analysis of random fields is employed and results are presented in the form of mean and variance of the structural …
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Investigation of the Stability of Metallic/Composited-Cased Solid Propellant Rocket Motors under External Pressure
… cylindrical shells. The first order shear deformable concept is adopted in the analyses to include the transverse shear flexibility of composites. A winkler-type of linear and nonlinear elastic foundation is applied to model the internal foundations. Pasternak-foundation constants are …
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Determination of the Design Parameters for the Route 601 Bridge: A Bridge Containing the Strongwell 36 inch Hybrid Composite Double Web Beam
… An elastic modulus (E) of 6,000 ksi and a shear stiffness (kGA) of 20,000 ksi-in2 were assumed and used with Timoshenko shear deformable beam theory to characterize the beams and determine the deflections. This thesis details the experimental work conducted in conjunction with the design of …
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On the quasi-static and dynamic crushing of random foams
… relative density. The ligaments are modeled as shear-deformable beams with variable cross sections discretized with beam elements in LS-DYNA, while the Al-alloy is modeled as a finitely deforming elastic-plastic material. Utilization of the beam-to-beam contact algorithm of the code is an …
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Integrated Sinc Method for Composite and Hybrid Structures
… compared for the first-order and third-order shear deformable theories, the refined zigzag beam theory and the higher-order shear and normal deformable beam theory. The results indicate that the interlaminar stresses by the zigzag theory compare well with those obtained by a 3D finite element …
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Mechanics of Beams and Plates with Variable Mechanical Properties
… geometrical imperfections using a higher-order shear deformation theory. Importance of geometrical imperfections, graphene origami content and its distribution patterns, and the folding degree is comprehensively analysed, and the effect of boundary conditions is also examined. Paper 2: This …
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Experimental and Numerical Analysis of Damage in Notched Composites
… the classical plate theory (Kirchhoff) and the shear deformable theory (Mindlin) within the framework of equivalent single-layer and layer-wise concepts as well as the three-dimensional theory of elasticity are developed to predict the natural frequencies of non-fatigued specimen. These models …
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