A composite sandwich plate with a novel core design

Uzal, Anil; Sonmez, Fazıl O.; Öz, Fatih E.; Çınar, Kenan; Ersoy, Nuri

doi:10.1016/j.compstruct.2018.03.047

Cited by 22 publications

(22 citation statements)

References 52 publications

(77 reference statements)

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“…Load carrying members in various engineering and structural applications are preferred to be as light as possible, along with having a very high strength. One of the most effective means to achieve such a structure is by making composites such as sandwich structures . These well‐known sandwich structures consist of outer face materials usually made up of composites or metals having high stiffness and a softer core material with low density in between them.…”

Section: Sandwich Structuresmentioning

confidence: 99%

“…These core materials are usually made from a less expensive material having a lower strength compared to the face sheets but providing effective overall load distribution and increasing the moment of inertia, which reduces stresses. Sandwich composites have provided a remedy for weight and flexural strength challenges in multiple sectors like aerospace, marine, automotive and architecture during the last few decades . A general representation of a sandwich structure is shown in Figure .…”

Section: Sandwich Structuresmentioning

confidence: 99%

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A review on recent advances in sandwich structures based on polyurethane foam cores

et al. 2020

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Sandwich composites with a polyurethane foam (PUF) core have become a versatile set of materials with applications ranging from basic construction elements to advanced engineering materials. This diverse range of applications has provided these sandwich materials with a distinctive position in today's engineering world. This review focuses on the broad research that has been carried out on PUF core‐based sandwich composites over the years—especially in the last decade. Thorough details have been presented focusing on basic PUF core sandwich structures, advanced PUF core sandwich composites with different kinds of reinforcements and complex structures such as hybrid sandwich panels. All the research presented here has been categorized carefully, such as the types of materials used in various studies, the types of reinforcements and testing techniques used, including mechanical, electrical, dynamic, thermal and acoustic methods etc. Comparisons have also been made based on similar materials, similar testing procedures and similar application areas. Research areas have been highlighted by giving a deep insight into the most promising research, manufacturing techniques and improvement procedures. Major consumption areas and application sectors for PUF core sandwich composites have also been discussed in this review. Finally, conclusions have been made based on the results found from a literature investigation.

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Section: Sandwich Structuresmentioning

confidence: 99%

Section: Sandwich Structuresmentioning

confidence: 99%

A review on recent advances in sandwich structures based on polyurethane foam cores

et al. 2020

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“…Although regular hexagonal arrangements are the most common geometries to be used in honeycomb panels, research has also focussed on new designs for the enhancement of in-plane properties [15]. There have been several experimental and numerical studies on the behaviour of sandwich structures with different core topologies which include honeycombs with corrugated walls [16,17], with ceramic tiles [18], auxetic cores [15,19], egg-box structures [7,20], truss cores [21,22], and other core designs, such as the ones studied by Araújo et al [23]. These authors [23] introduced three core designs for sandwich composite structures based on topologies proposed by Ronan et al [24].…”

Section: Introductionmentioning

confidence: 99%

Investigating the contribution of geometry on the failure of cellular core structures obtained by additive manufacturing

Araújo¹,

Leite²,

Ribeiro³

et al. 2019

Frattura Ed Integrità Strutturale

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The aim of this work is to evaluate the mechanical properties and failure analysis of cellular core structures with different geometries that were obtained by additive manufacturing. Sandwich panels are widely used in the aerospace and automotive industry. In general, the core of the panels is made of a two dimensional cellular with a honeycomb geometry. With the development of additive manufacturing methods it is possible to produce samples with complex geometries which may compete with conventional designs. Thus an investigation was conducted to evaluate the mechanical behavior of three core geometries, specifically, regular honeycombs, lotus and hexagonal honeycombs with Plateau borders. Samples were produced in PLA (polylactic acid) by fused deposition modelling (FDM). Experimental compressive loading in three different directions, and finite element simulations of the samples permit to evaluate their deformation and failure mechanisms.

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“…[18][19][20][21][22] There is a growing interest in exploring other structures that might enhance the shear response, load-bearing and energy absorption ability of the lightweight structures. 18,21,[23][24][25] New core designs have been proposed in order to replace the more common honeycomb hexagonal structure. 21,23,26,27 In particular, two new core designs, specifically lotus and hexagonal honeycomb with Plateau Borders, have been recently proposed by Arau´jo et al 26 and compared with the regular hexagonal honeycomb.…”

Section: Introductionmentioning

confidence: 99%

Bioinspired structures for core sandwich composites produced by fused deposition modelling

Bru

Leite

Ribeiro

et al. 2019

Proceedings of the Institution of Mechanical Engineers, Part L:

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Sandwich panels are widely used in many engineering applications where saving weight while maintaining high strength and stiffness is required. The most common core structure in sandwich panels is the two-dimensional regular hexagonal cell shape, denoted as Honeycomb. In recent times, bioinspired materials and structures have become increasingly attractive to researchers, as they provide adequate functional properties. The goal of the present work is to study two new bioinspired structures aimed at improving the performance of sandwich panel cores. Among all the large amount of structures that nature provides, two novel cores inspired in the structures of enamel and of bamboo were chosen. The compressive and flexural properties of these two innovative cellular structures were assessed and compared with the classic honeycomb. All the arrangements were numerically simulated for different relative densities. The fused deposition modelling technique enables to print selected samples in polylactic acid that were experimentally tested in compression and in bending. Results show that the mechanical properties depend strongly on the core geometry, on the relative density and on the cell thickness distribution. A satisfactory agreement was found between finite element results and experimental data. For the same relative density, the bioinspired natural structures proposed in the present study are potential competitors with the traditional core structures in what concerns strength, stiffness and energy absorption.

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A composite sandwich plate with a novel core design

Cited by 22 publications

References 52 publications

A review on recent advances in sandwich structures based on polyurethane foam cores

A review on recent advances in sandwich structures based on polyurethane foam cores

Investigating the contribution of geometry on the failure of cellular core structures obtained by additive manufacturing

Bioinspired structures for core sandwich composites produced by fused deposition modelling

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