On higher order shear deformation theory of laminated composite panels

Mürty, A. V. Krishna; Vellaichamy, Senthilvel

doi:10.1016/0263-8223(87)90018-3

Cited by 46 publications

(3 citation statements)

References 12 publications

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“…During the last few decades, tremendous research efforts have been invested in this area and various approximate models have been developed. These developed models are mainly equivalent single layer theories [8–14], layer-wise theories [15,16], and zig-zag theories [17]. Most of these models, originally developed for isothermal problems of laminated or sandwich plate structures, have been extended to include thermoelastic deformations [7,18,19].…”

Section: Introductionmentioning

confidence: 99%

Asymptotic theory of 3D thermoelastic stress analysis of honeycomb sandwich panels with composite facesheets

Rao

Renji

Harursampath

2018

Jnl of Sandwich Structures & Materials

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This work presents an asymptotical thermoelastic model for analyzing symmetric composite sandwich plate structures. Use of three-dimensional finite elements to analyze real-life composite sandwich structures is computationally prohibitive, while use of two-dimensional finite element cannot accurately predict the transverse stresses and three-dimensional displacements. Endeavoring to fill this gap, the present theory is developed based on the variational asymptotic method. The unique features of this work are the identification and utilization of small parameters characterizing the geometry and material stiffness coefficients of sandwich structural panels in addition to the small parameters pertaining to any plate-like structure. In this formulation, using variational asymptotic method, the three-dimensional thermoelastic problem is mathematically split into a one-dimensional through-the-thickness analysis, and a two-dimensional reference surface analysis. The through-the-thickness analysis provides the constitutive relation between the generalized two-dimensional strains, and the generalized force resultants for the plate analysis, it also provides a set of closed-form solutions to express the three-dimensional responses in terms of two-dimensional variables, which are determined by solving the equilibrium equations of the plate reference surface. Numerical results are illustrated for a typical composite sandwich panel subjected to a linear-bisinusoidal thermal loading. The three-dimensional responses of the composite sandwich structure from the present theory are compared with the three-dimensional finite element solutions of MSC NASTRAN®. The results from the present theory agree closely with three-dimensional finite element results and yet enable order of magnitude saving in computational resources and time.

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Section: Introductionmentioning

confidence: 99%

Asymptotic theory of 3D thermoelastic stress analysis of honeycomb sandwich panels with composite facesheets

Rao

Renji

Harursampath

2018

Jnl of Sandwich Structures & Materials

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“…With an increase of thickness-to-length ratio and inhomogeneity in the material properties through the thickness, the interlaminar stresses have a great effect on the static and dynamic response of laminated composite structures. However, single-layer theories, such as the global higher-order theories [1][2][3][4][5][6] and the first-order theories [7,8], neglect the continuity conditions of interlaminar stresses across the thickness of the laminate. Thus, singlelayer theories encountered difficulties to predict natural frequencies and critical loads of sandwich plates with soft core [9][10][11][12][13].…”

Section: Introductionmentioning

confidence: 99%

C0-type global–local theory with non-zero normal strain for the analysis of thick multilayer composite plates

Sze

et al. 2010

Comput Mech

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In this paper, an accurate and efficient C 0 -type third-order global-local model incorporating effects of the transverse normal strain is proposed to study the thermal/mechanical behaviors of thick multilayer cross-ply plates. Transverse displacement is assumed to be a linear distribution through the thickness direction, for which the normal strain could be readily computed. Based on the interlaminar continuity conditions of in-plane displacement and transverse shear stresses, layer-dependent variables could be reduced. Employing shear stress free condition at the upper and the lower surfaces, derivatives of transverse displacement are eliminated from the displacement field, so that C 0 interpolation functions are only required for the finite element implementation. As a result, the number of variables is independent of the number of layers of the laminate. To assess the proposed model, the classical quadratic eight-node isoparametric element is used for the interpolation of all the displacement parameters defined at each nodal point on the composite plate. Comparing with various existing composite plate models, it is found that simple C 0 finite elements with non-zero normal strain could produce accurate deformations and stresses of thick multilayer composite plates subjected to thermal and mechanical loads.

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“…Moreover, an uncomplicated and rapidly executable test is desirable to ensure that material characterisation is possible, resulting in easier application of these advanced materials in design, with reasonable safety margin. With this objective in focus, a study on in‐plane shear test techniques, which can be carried out on laminate flat plates, was made and recent literature studies [1–21] have endeavoured to present comparisons of the popular shear testing and analysis methods.…”

Section: Introductionmentioning

confidence: 99%

Shear Characterisation of Woven Carbon/Epoxy Composite Under Various Adverse Environments

Dash

Singh

2011

Strain

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In this article, an investigation into the shear properties of bi-directional carbon fibre reinforced composite has been carried out by 'rail-shear' test method (D4255). The specimens were tested under various adverse environmental conditions after subjecting them to different durations of exposure. A comparison between time-dependent degradation of the shear properties of the material with respect to virgin shear properties is made, and the results have been analysed with emphasis on material weight gain or loss under those adverse environments.

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On higher order shear deformation theory of laminated composite panels

Cited by 46 publications

References 12 publications

Asymptotic theory of 3D thermoelastic stress analysis of honeycomb sandwich panels with composite facesheets

Asymptotic theory of 3D thermoelastic stress analysis of honeycomb sandwich panels with composite facesheets

C0-type global–local theory with non-zero normal strain for the analysis of thick multilayer composite plates

Shear Characterisation of Woven Carbon/Epoxy Composite Under Various Adverse Environments

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