Curved Sandwich Panels Subjected to Temperature Gradient and Mechanical Loads

Noor, Ahmed K.; Starnes, James H.; Peters, Jeanne M.

doi:10.1061/(asce)0893-1321(1997)10:4(143)

Cited by 15 publications

(9 citation statements)

References 15 publications

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“…Noor, Starnes, and Peters [58] studied the nonlinear effects of a temperature gradient through the thickness of a curved sandwich panel. More recently, Noor and Peters [59] extended this study to include the effects of circular cutouts LONG TERM EFFECTS Creep and viscoelastic effects can be important.…”

Section: Coresmentioning

confidence: 99%

Sandwich Structures

Vinson

2001

Applied Mechanics Reviews

292

121

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The use of sandwich structures is increasing rapidly. It is used in many applications ranging from satellites, aircraft, ships, automobiles, rail cars, and in bridge construction to mention only a few. The purpose of the following review article is to provide a general introduction to or discussion of the structural mechanics involved in the field of sandwich structures and a sufficient number of references to enable the reader to further investigate his/her specific interests. Like all reviews, it is limited by the knowledge of the author and a reasonable length for the article. This article has 174 references.

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Section: Coresmentioning

confidence: 99%

Sandwich Structures

Vinson

2001

Applied Mechanics Reviews

292

121

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“…The kinematic relations for the core are (13) where u c and w c are the horizontal and vertical displacements of the core, respectively.…”

Section: Mathematical Formulationmentioning

confidence: 99%

“…The longitudinal displacement is determined through the kinematic relation (13) and the constitutive relation (37) and it equals…”

Section: Core-stress and Displacement Fieldsmentioning

confidence: 99%

High-Order Analysis of Unidirectional Sandwich Panels with Flat and Generally Curved Faces and a “Soft” Core

Rabinovitch

Frostig

2001

Jnl of Sandwich Structures & Materials

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The bending behavior of a unidirectional sandwich panel with flat and generally curved faces and a flexible core in the vertical direction is investigated. The studied panels consist of an upper flat face sheet, a core of variable thickness, and a lower face sheet that can take any geometrical layout described by an analytical function. The core is assumed a two-dimensional elastic medium with shear and transverse vertical rigidities only, and the face sheets are considered as membrane and bending members made of metallic or composite materials. The term unidirectional refers here either to a beam (narrow panel) or to a wide beam (panel) undergoing a cylindrical bending. The field equations and the boundary conditions are derived via the variational principle of the virtual work and transformed from the local polar coordinate system of the curved face into the global Cartesian one. Higher order effects due to flexibility of the core in the form of nonlinear deformation fields are incorporated in the proposed analysis as a result of the closed-form solution of the field equations and are not postulated a priori. Numerical results in terms of deformations, stresses, and stress resultants are presented for some typical cases of flat-curved panels. The effect of a wide range of layouts, various boundary conditions, and the influence of manufacturing imperfections in the form of initially wrinkled face are investigated. The results demonstrate the capabilities and generality of the proposed model and present its ability to predict the high-order localized effects that characterize such panels.

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“…The literature is rather limited when it comes to sandwich curved panels. Noor et al [7,8] outlined models that assume that the core is incompressible following the first-order shear deformable (FOSD) theory, and Vaswani et al [9] studied the vibration and damping analysis of curved sandwich beams by using the Flugge shell theory, while assuming that the face sheets are membranes only and the core is incompressible. Yin-Jiang [10] studied the stability of shallow cylindrical sandwich panels with orthotropic layers by use of the FOSD theory but with membrane and flexural rigidities of the face sheets.…”

Section: Introductionmentioning

confidence: 99%

Extended High-Order Theory for Curved Sandwich Panels and Comparison With Elasticity

Rodcheuy

Frostig

Kardomateas

2017

Journal of Applied Mechanics

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A new one-dimensional high-order sandwich panel theory for curved panels is presented and compared with the theory of elasticity. The theory accounts for the sandwich core compressibility in the radial direction as well as the core circumferential rigidity. Two distinct core displacement fields are proposed and investigated. One is a logarithmic (it includes terms that are linear, inverse, and logarithmic functions of the radial coordinate). The other is a polynomial (it consists of second and third-order polynomials of the radial coordinate), and it is an extension of the corresponding field for the flat panel. In both formulations, the two thin curved face sheets are assumed to be perfectly bonded to the core and follow the classical Euler–Bernoulli beam assumptions. The relative merits of these two approaches are assessed by comparing the results to an elasticity solution. The case examined is a simply supported curved sandwich panel subjected to a distributed transverse load, for which a closed-form elasticity solution can be formulated. It is shown that the logarithmic formulation is more accurate than the polynomial especially for the stiffer cores and for curved panels of smaller radius.

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Curved Sandwich Panels Subjected to Temperature Gradient and Mechanical Loads

Cited by 15 publications

References 15 publications

Sandwich Structures

Sandwich Structures

High-Order Analysis of Unidirectional Sandwich Panels with Flat and Generally Curved Faces and a “Soft” Core

Extended High-Order Theory for Curved Sandwich Panels and Comparison With Elasticity

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