Numerical investigation of a three point bending test on sandwich panels with aluminum skins and Nomex™ honeycomb core

Giglio, Marco; Gilioli, Andrea; Manes, Andrea

doi:10.1016/j.commatsci.2012.01.007

Cited by 96 publications

(63 citation statements)

References 16 publications

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“…Three point bending test is needed for determining their mechanical properties. Giglio et al [16] studied sandwich panels with Al skins and Nomex TM Honeycomb material behavior while three point bending test by comparing numerical results and experimental data. They considered influence of various parameters like friction and relative position of the puncher which in their numerical investigations.…”

Section: Resultsmentioning

confidence: 99%

“…These results also will provide the user and producers to select more appropriate material of their product which provides more safety and functionality. As stated in literature review [10][11][12][13][14][15][16][17] there are many different kind of uncertain sources which are also have important role on combined uncertainty. In the second step of this research new kind of material and more different sized geometries are aimed to investigate as effective uncertainty components.…”

Section: Resultsmentioning

confidence: 99%

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Calculation of measurement uncertainty for plastic (ABS) material in flexural testing

Günay

Fank

Gülmez

et al. 2013

Int. J. Metrol. Qual. Eng.

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Abstract. In order to determine mechanical properties of materials various kind of tests can be applied by means of using their tensile strength, lower yield stress, proof stress, impact strength, Brinell, Rockwell and surface hardness, elongation after fracture properties. Among these tests, three point flexural testing method has some advantages such as easy preparation (production) of samples and no gripping problems comparing to tension test. Flexural tests results should be obtained accurately to provide expected testing performance. The measurement uncertainty of flexural tests should be calculated by conducting all effective uncertainty parameters during the test procedure. In this study, the measurement uncertainty of the flexural test of ABS (Acrylonitrile Butadiene Styrene) material was investigated, which is widely used as industrial plastic material in many applications.

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Calculation of measurement uncertainty for plastic (ABS) material in flexural testing

Günay

Fank

Gülmez

et al. 2013

Int. J. Metrol. Qual. Eng.

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“…Also, this type of testing was performed by Giglio et al in Ref. [38]. When a load is applied to this kind of sandwich beam, the core is subjected almost entirely to shear stresses as the skins absorb the flexural components.…”

Section: Benchmark Test Specimens: Descriptionmentioning

confidence: 99%

Experimental and numerical analysis of the shear nonlinear behaviour of Nomex honeycomb core: Application to insert sizing

Rodríguez-Ramírez

Castanié

Bouvet

2018

Composite Structures

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numerical analysis of the shear nonlinear behaviour of Nomex honeycomb core: Application to insert sizing. Composite Structures, Elsevier, 2018, vol. 193, pp. 121-139. 10.1016/j.compstruct.2018 A B S T R A C TThis work is a contribution to the understanding of the nonlinear shear behaviour caused by cell postbuckling in Nomex honeycomb cores. First, an experimental benchmark study was made of different designs for the shear testing of honeycomb cores. Then, several test specimens were fabricated and tested, a 3D DIC system being used to measure and record the displacements. An Artificial Neural Network (ANN) was also used to identify the onset of bucking and collapse of the cells. The influence of the overall boundary conditions of shear tests on the buckling of the cells is presented both experimentally and numerically. The reversibility and test procedure results suggest that it may be possible to allow the shear strength to be increased by up to 35% under certain conditions.

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“…Many authors attempted to determine the equivalent properties of central core by separately modeling the honeycomb core sheet with hexagonal unit cells [1][2][3][4][5][6]. Each cell of the honeycomb sheet periodically repeats itself within inplane direction.…”

Section: Introductionmentioning

confidence: 99%

Finite Element Analysis of Bend Test of Sandwich Structures Using Strain Energy Based Homogenization Method

Ijaz

Saleem

Zain-ul-abdein

et al. 2017

Advances in Materials Science and Engineering

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The purpose of this article is to present a simplified methodology for analysis of sandwich structures using the homogenization method. This methodology is based upon the strain energy criterion. Normally, sandwich structures are composed of hexagonal core and face sheets and a complete and complex hexagonal core is modeled for finite element (FE) structural analysis. In the present work, the hexagonal core is replaced by a simple equivalent volume for FE analysis. The properties of an equivalent volume were calculated by taking a single representative cell for the entire core structure and the analysis was performed to determine the effective elastic orthotropic modulus of the equivalent volume. Since each elemental cell of the hexagonal core repeats itself within the in-plane direction, periodic boundary conditions were applied to the single cell to obtain the more realistic values of effective modulus. A sandwich beam was then modeled using determined effective properties. 3D FE analysis of Three-and Four-Point Bend Tests (3PBT and 4PBT) for sandwich structures having an equivalent polypropylene honeycomb core and Glass Fiber Reinforced Plastic (GFRP) composite face sheets are performed in the present study. The authenticity of the proposed methodology has been verified by comparing the simulation results with the experimental bend test results on hexagonal core sandwich beams.

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Numerical investigation of a three point bending test on sandwich panels with aluminum skins and Nomex™ honeycomb core

Cited by 96 publications

References 16 publications

Calculation of measurement uncertainty for plastic (ABS) material in flexural testing

Calculation of measurement uncertainty for plastic (ABS) material in flexural testing

Experimental and numerical analysis of the shear nonlinear behaviour of Nomex honeycomb core: Application to insert sizing

Finite Element Analysis of Bend Test of Sandwich Structures Using Strain Energy Based Homogenization Method

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