Experimental analysis of the flexural properties of sandwich panels with cellular core materials

Fiedler, Thomas; Öchsner, Andreas

doi:10.1002/mawe.200700269

Cited by 15 publications

(14 citation statements)

References 16 publications

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“…5 The cores are, in general, made of cellular materials, which may be classified into two-dimensional and three-dimensional structures. 2,6 The two-dimensional structures comprise the honeycombs, being the most used the one formed by periodic hexagonal structures. However, new arrangements have been proposed recently.…”

Section: Introductionmentioning

confidence: 99%

Evaluation of the effect of core lattice topology on the properties of sandwich panels produced by additive manufacturing

Monteiro

Sardinha

Alves

et al. 2020

Proceedings of the Institution of Mechanical Engineers, Part L:

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Sandwich structures are frequently used in automotive, aerospace and marine industries, as they provide adequate functional properties. The two-dimensional regular hexagonal cell shape, i.e. honeycomb is the most used core structure in sandwich panels. Recently, a new type of cellular structures composed of lattice struts has been proposed, as they combine high stiffness, strength and energy absorption with low weight. The main purpose of this research is to investigate the effect of the lattice topology on the flexural behaviour of sandwich panels. Five lattice geometries inspired in crystalline structures were designed, namely, body-centred parallelepiped, body-centred parallelepiped with struts in z-axis, body- and face-centred parallelepiped with struts in z-axis, face-centred parallelepiped with struts in z-axis and parallelepiped simple. The relative density of all the lattices was kept constant as 0.3. Both numerical and experimental approaches were used to evaluate the flexural properties and failure behaviour of the sandwich structures under three-point bending tests. The numerical analysis was undertaken with the finite element software NX Nastran. Taking advantage of additive manufacturing technologies, material extrusion was used to produce polylactic acid samples with the configurations aforementioned. The sandwich panels are composed by a single layer formed by the lattice core and two thin plates, at the bottom and top. The three parts of the panel were manufactured all together. The simulation results indicate that, among the lattices studied, topologies body-centred parallelepiped with struts in z-axis and body- and face-centred parallelepiped with struts in z-axis exhibit higher strength, while body- and face-centred parallelepiped with struts in z-axis shows higher stiffness and higher energy absorption, attaining values that do not differ much from the ones obtained with a two-dimensional hexagonal cellular structure, with the same relative density. As a consequence, some of the geometries studied may have the potential to be considered as alternatives to conventional structures in the design of sandwich structures.

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Section: Introductionmentioning

confidence: 99%

Evaluation of the effect of core lattice topology on the properties of sandwich panels produced by additive manufacturing

Monteiro

Sardinha

Alves

et al. 2020

Proceedings of the Institution of Mechanical Engineers, Part L:

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“…A sandwich compound is able to absorb further energy during core indentation which improves its performance under impact conditions as similar to Ref. .…”

Section: Resultsmentioning

confidence: 93%

“…Sandwich structures are applied as machine parts in lightweight construction. In particular, aluminum sandwich construction has been recognised as an ideal concept for structural design of lightweight transportation systems such as aircraft, high‐speed trains, and fast ships . In recent years, honeycomb sandwich structures have attracted considerable interest as advanced composite materials that satisfy the high performance requirements of machine design.…”

Section: Introductionmentioning

confidence: 99%

Damage characterization of three point bended honeycomb sandwich structures under different temperatures with cone beam computed tomography technique

Akatay¹,

Bora

Fi̇dan

et al. 2015

Polymer Composites

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This study investigates the effect of different temperatures on the flexural properties of honeycomb sandwich structures which have a commercial code as Gillfloor 5424. Flexural properties of honeycomb sandwich structures were determined under three different temperatures (−20°C, 20°C, and 40°C). The results obtained from honeycomb sandwich structures were correlated with a function of core shear ultimate stress, facing stress, flexural stiffness and bending modulus of the sandwich panel. Moreover, cone beam computed tomography technique was used to visualize the internal damage of honeycomb sandwich structures after three point bending tests. POLYM. COMPOS., 39:46–54, 2018. © 2015 Society of Plastics Engineers

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“…In [6][7][8][9][10][11][12][13], the authors present further sandwich structures. The results of diagnostic methods suitable for sandwiches and their components are described in [14][15][16][17][18][19][20][21][22][23][24].…”

Section: Introductionmentioning

confidence: 99%

Case Study of Chosen Sandwich-Structured Composite Materials for Means of Transport

et al. 2020

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Modern means of transport increasingly utilize sandwich constructions. Among other things, the reasons for such state of affairs include the reduced weight of means of transport, and through this, better fuel economy as well as price. This work is dedicated to a systematic experimental study of the influence of various materials and sandwich designs on their mechanical properties. In the framework of experiments, sandwich-structured composites were exposed to two types of stressing: static as well as impact stressing. The testing of prepared samples was performed according to ASTM C-393 Standard, dealing specifically with the bending behavior of sandwich composite constructions and impact testing under the scope of ISO 6603-2 Standard test. In this article we deal with static and impact testing of the eight types of core materials, two types of coatings, two types of surface finishes, and two types of resins with a special emphasis on their use in constructions of some exterior or interior components of transport means.

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Experimental analysis of the flexural properties of sandwich panels with cellular core materials

Cited by 15 publications

References 16 publications

Evaluation of the effect of core lattice topology on the properties of sandwich panels produced by additive manufacturing

Evaluation of the effect of core lattice topology on the properties of sandwich panels produced by additive manufacturing

Damage characterization of three point bended honeycomb sandwich structures under different temperatures with cone beam computed tomography technique

Case Study of Chosen Sandwich-Structured Composite Materials for Means of Transport

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