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Showing papers on "Sandwich panel published in 1981"


Journal ArticleDOI
TL;DR: In this paper, the problem of sound transmission and structural response of a sandwich panel backed by a cavity is analyzed in an acousto-elastic formulation, and a matrix inversion scheme is proposed and used for the solution.

19 citations


Patent
23 Mar 1981
TL;DR: In this article, a method for manufacturing sandwich panels of the type in which a pair of facing sheets 12 are separated by a multiplicity of pins 14 is disclosed, and concepts and techniques for fabricating the structure in a leachable matrix are discussed.
Abstract: A method for manufacturing sandwich panels of the type in which a pair of facing sheets 12 are separated by a multiplicity of pins 14 is disclosed. Concepts and techniques for fabricating the structure in a leachable matrix are discussed. Selective roll bonding and cutting are employed to form pins of accurate dimension contour and spacing.

6 citations



Patent
19 Feb 1981
TL;DR: Curved sandwich-construction panels are produced and fixed to flat sandwich panels for use in caravans etc; they utilise foam core material and the core can incorporate stiffening profiled sections as discussed by the authors.
Abstract: Curved sandwich-construction panels are produced and fixed to flat sandwich panels for use in caravans etc.; they utilise foam core material and the core can incorporate stiffening profiled sections. As a first operation a flat sandwich panel receives parallel saw cuts through the inner skin at the area to be bent, the panel is then bent, and finally fixed to the straight panel at the straight part adjacent to the bend. Suitable for roof or wall components, low cost, eliminate need for aluminium coverings for timber or metal members.

4 citations


Patent
01 Oct 1981
TL;DR: In this article, a panel comprising external metal faces with a foam core sandwiched between them is intended for wide-ranging use, in buildings, automobile bodywork and the internal fitting out of ships.
Abstract: A panel comprising external metal faces with a foam core sandwiched between them is intended for wide-ranging use, in buildings, automobile bodywork and the internal fitting out of ships. Each face of the panel is composed of two or more successive (adjacent) steel plates, having their longitudinal edges hooked or folded together. The plates on one side may be aligned with those on the other or be staggered relative to them. Plates may have a high-quality surface finish of the automobile bodywork type. Pref. the foam core is of polyurethane.

3 citations


01 Mar 1981
TL;DR: In this paper, finite element analysis techniques are developed for the solution of non-linear problems involving sandwich composite materials, where each layer of a sandwich panel is represented explicitly so that multicore panels and other configurations are easily considered.
Abstract: : Finite element analysis techniques are developed for the solution of nonlinear problems involving sandwich composite materials. Each layer of a sandwich panel is represented explicitly so that multicore panels and other configurations are easily considered. The finite element discretization is performed using arbitrary-shaped, fully compatible shell and continuum elements, as well as special elements representing full-depth and/or face sheet stiffeners. Each of these elements is capable of representing arbitrarily large displacements and rotations, since no simplifying assumptions are made in the theoretical formulation. Elastic-plastic effects may also be considered. An associated computer program is described which may be used to perform linear or nonlinear solutions for mechanical and thermal loading, linear natural frequency calculations. Several example problems are solved to demonstrate the capabilities of the program. (Author)

2 citations


Patent
13 Nov 1981

1 citations


Patent
27 May 1981

1 citations


Journal ArticleDOI
TL;DR: In this article, a method of analyzing the effective heat conduction of sandwich panels with different kinds of filler cells is elucidated, and the authors propose a method to analyze the effect of different filler cells.
Abstract: A method of analyzing the effective heat conduction of sandwich panels with different kinds of filler cells is elucidated.