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Sandwich panel

About: Sandwich panel is a research topic. Over the lifetime, 4665 publications have been published within this topic receiving 49812 citations.


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Patent
09 Jul 1973
TL;DR: A sandwich panel is formed with a cellular core structure having nodes which project in opposite directions from a midplane, the core structure being sandwiched between a pair of face sheets, with the apices of the nodes abutting against the face sheets.
Abstract: A sandwich panel is formed with a cellular core structure having nodes which project in opposite directions from a midplane, the core structure being sandwiched between a pair of face sheets, with the apices of the nodes abutting against the face sheets. Reinforcing elements in the form of linear bar elements are bonded to the sides of a line of nodes and the panel faces against which the apices of these nodes abut, and in certain embodiments, also to the midplane portion of the core. These reinforcing elements operate to resist buckling in long span flexure and to better handle shear loads in short span flexure, thus substantially improving the structural characteristics of the panel.

32 citations

Journal ArticleDOI
TL;DR: In this article, the experimental and simulation results for the low-velocity impact response of sandwich panels reinforced with a lattice core structure were presented, and two different core material and architecture combinations were investigated; a UV-cured photopolymer lattice, produced from a network of self-propagating waveguides and an aluminum alloy lattice cast from an initial polymer template.

32 citations

Journal ArticleDOI
TL;DR: In this article, a homogenization method for geometric nonlinear analysis of structural core sandwich panels is proposed, which provides high computational performance based on an efficient separation of scales and allows for description of buckling in these two scales and is shown to hold good accuracy with respect to equivalent 3D FEM models.

32 citations

Journal ArticleDOI
TL;DR: In this article, a one-dimensional analysis for the blast response of a sandwich beam/wide plate with a compressible core is presented, and the dynamic version of the recently developed extended high-order sandwich panel theory (EHSAPT) is first formulated.
Abstract: This paper presents a one-dimensional analysis for the blast response of a sandwich beam/wide plate with a compressible core. The dynamic version of the recently developed extended high-order sandwich panel theory (EHSAPT) is first formulated. Material, geometric, and loading parameters are taken from blast experiments reported in literature. The novelty of EHSAPT is that it includes axial rigidity of the core and allows for three generalized coordinates in the core (the axial and transverse displacements at the centroid of the core and the rotation at the centroid of the core) instead of just one (shear stress in the core) of the earlier high-order sandwich panel theory (HSAPT). The solution procedure to determine the dynamic response to a general load applied on the top face sheet of a general asymmetric simply supported configuration is outlined. Although the dynamic EHSAPT is formulated in its full nonlinear version, the solution is for the linear problem so the accuracy of EHSAPT, along with the other theories, can be assessed by comparison to an available dynamic elasticity solution. Results show that the EHSAPT is very accurate and can capture the complex dynamic phenomena observed during the initial, transient phase of blast loading. [DOI: 10.1115/1.4023619]

32 citations

Journal ArticleDOI
TL;DR: In this article, the performance of a precast concrete sandwich panel is investigated using high-definition finite element (FE) models, based on 3D brick and 2D interface elements, to assess the capacity of this technology under shear, tension and compression.
Abstract: The focus of the present study is to investigate both local and global behaviour of a precast concrete sandwich panel. The selected prototype consists of two reinforced concrete layers coupled by a system of cold-drawn steel profiles and one intermediate layer of insulating material. High-definition nonlinear finite element (FE) models,based on 3D brick and 2D interface elements, are used to assess the capacity of this technology under shear, tension and compression. Geometrical nonlinearities are accounted via large displacement-large strain formulation, whilst material nonlinearities are included, in the series of simulations, by means of Von Mises yielding criterion for steel elements and a classical total strain crack model for concrete; a bond-slip constitutive law is additionally adopted to reproduce steel profile-concrete layer interaction. First, constitutive models are calibrated on the basis of preliminary pull and pull-out tests for steel and concrete, respectively. Geometrically and materially nonlinear FE simulations are performed, in compliance with experimental tests, to validate the proposed modeling approach and characterize shear,compressive and tensile response of this system, in terms of global capacity curves and local stress/strain distributions. Based on these experimental and numerical data, the structural performance is then quantified under various loading conditions, aimed to reproduce the behaviour of this solution during production, transport, construction and service conditions.

32 citations


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Performance
Metrics
No. of papers in the topic in previous years
YearPapers
202384
2022217
2021244
2020280
2019264
2018252