A refined high-order global-local theory for finite element bending and vibration analyses of laminated composite beams

A refined high-order global-local laminated/sandwich beam theory is developed that satisfies all the kinematic and stress continuity conditions at the layer interfaces and considers effects of the transverse normal stress and transverse flexibility, e.g. for beams with soft cores or drastic material...

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Veröffentlicht in:Acta mechanica 2011-03, Vol.217 (3-4), p.219-242
Hauptverfasser: Lezgy-Nazargah, M., Shariyat, M., Beheshti-Aval, S. B.
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Shariyat, M.
Beheshti-Aval, S. B.
description A refined high-order global-local laminated/sandwich beam theory is developed that satisfies all the kinematic and stress continuity conditions at the layer interfaces and considers effects of the transverse normal stress and transverse flexibility, e.g. for beams with soft cores or drastic material properties changes. The global displacement components, described by polynomial or combinations of polynomial and exponential expressions, are superposed on local ones chosen based on the layerwise or discrete-layer concepts. Furthermore, the non-zero conditions of the shear and normal tractions of the upper and lower surfaces of the beam may also be enforced. In the present C 1 -continuous shear locking-free finite element model, the number of unknowns is independent of the number of layers. Comparison of present bending and vibration results for thin and thick beams with results of the three-dimensional theory of elasticity reveals efficiency of the present method. Moreover, the proposed model is computationally economic and has a high convergence rate.
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subjects Beams (structural)
Bending
Classical and Continuum Physics
Composite materials
Control
Dynamical Systems
Engineering
Engineering Thermodynamics
Exact sciences and technology
Finite element analysis
Finite element method
Fundamental areas of phenomenology (including applications)
Heat and Mass Transfer
Kinematics
Laminates
Mathematical analysis
Mathematical models
Physics
Shear
Solid Mechanics
Static elasticity (thermoelasticity...)
Stresses
Structural and continuum mechanics
Theoretical and Applied Mechanics
Vibration
Vibration analysis
Vibration, mechanical wave, dynamic stability (aeroelasticity, vibration control...)
title A refined high-order global-local theory for finite element bending and vibration analyses of laminated composite beams
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