Experimental Analysis of the Crushing of Honeycomb Cores Under Compression

Mertani, Boubekeur Mohammed Bilel; Keskes, Boualem; Tarfaoui, Mostapha

doi:10.1007/s11665-018-3852-2

Cited by 16 publications

(6 citation statements)

References 19 publications

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“…It is found that sandwich panel with lower cell size has more energy absorption capability. Mertani et al 52 experimentally analyzed the crushing of honeycomb sandwich panels with different configurations such as core density, cell number, specimen size, and cell size. They resulted that a decrease in cell size increases energy absorption of the sandwich panel under axial compression.…”

Section: Three-point Bending Testsmentioning

confidence: 99%

Fabrication, characterization and mechanical testing of carbon fiber sandwich composites with nanoparticle included polyurethane adhesives

Çetin

2021

Journal of Composite Materials

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In honeycomb core and composite face sheet sandwich panels, it is essential to understand the bonding characteristics of adhesive in relevance with its properties to observe synergistic effects of reinforcing nanoparticles such as multi-walled carbon nanotubes (MWCNTs). This study investigates the effects of MWCNT inclusion on polyurethane (PU) adhesive, which directly affects sandwich structures' structural and mechanical performance. MWCNTs are added to PU adhesive up to 0.2%, and their RAMAN spectroscopic analysis, Fourier transform infrared spectroscopy (FT-IR), thermo-gravimetric analyses (TGA) and differential-scanning calorimetry analyses (DSC) are evaluated. Aluminum honeycomb carbon-fiber-reinforced composite (CFRC) sandwich panels are fabricated using an out-of-autoclave manufacturing process. Carbon-fiber prepreg is used for top/bottom face sheets. Mechanical strength of face/core bonding evaluated as a function of MWCNT addition and core cell sizes. Manufactured sandwich composite structures are investigated for flat-wise tensile strength and three-point bending strength. Results show that MWCNT reinforcement to PU adhesive and lower cell size increases bending and flat-wise tensile resistances.

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Section: Three-point Bending Testsmentioning

confidence: 99%

Fabrication, characterization and mechanical testing of carbon fiber sandwich composites with nanoparticle included polyurethane adhesives

Çetin

2021

Journal of Composite Materials

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“…The aluminum honeycomb core sandwich is a structural composite material formed by adding an aluminum honeycomb core layer between two thin metal plates [2] . This material can greatly improve the overall relative strength and stiffness under the premise of slightly increased mass [3] . It has received wide attention in aeronautical and aerospace engineering [4] .…”

Section: ．Introductionmentioning

confidence: 99%

Effect of aluminum honeycomb core milling defects on mechanical properties of sandwich structure

Wu¹,

Liu²,

Zhang³

et al. 2023

Preprint

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The honeycomb core sandwich structure has received wide attention in aeronautical and aerospace engineering in recent years, which is a structural composite material formed by adding an aluminum honeycomb core layer between two thin metal plates. The honeycomb core has high rigidity in the axial direction, but low rigidity in the radial direction, so many machining defects may easily take place under the action of the horizontal cutting force. To investigate how such defects affect the mechanical properties of aluminum honeycomb core sandwich structure, the mechanical response of honeycomb cores in a flat compression and the deformation process in a low-velocity impact were studied. By milling the aluminum honeycomb cores, the typical defects such as honeycomb wall tearing, folding, crushing, cracking, and debonding were obtained. In addition, a finite element model of the honeycomb sandwich structure with machining defects was created to simulate the flat compression and the low-velocity impact. Then the effects of machining defects on the impact properties under different impact conditions were compared and analyzed. The results show that the tearing has the greatest influence on the flat compression of the aluminum honeycomb core, the length and number of the tearing defect together affect the load carrying capacity of the sandwich structure, however the influences of the crushing and folding, cracking and debonding of the honeycomb wall are small. When the tearing length was 0.3L (L is the length of the honeycomb core wall) and tearing defect ratio was maintained below 8%, the ultimate load applied on the honeycomb sandwich structure and the energy absorption were less affected by the impact energy. The panel thickness has a great influence on the impact performance of the honeycomb sandwich structure, the greater panel thickness of the sandwich structure of the aluminum honeycomb core provides a greater ultimate load capability and a smaller influence of the machining defects on the impact performance of the sandwich structure, with a comprehensive consideration of both lightweight design and reducing the influence of the number of defects on the impact performance of the sandwich structure, the best choice of the skin panel thickness for the honeycomb core was 1 mm.

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“…The sandwich panel is composed of two panels and several compressible cores. According to the existing literature, there are four common core designs for sandwich panel: corrugated cores [4][5][6], honeycomb cores [7][8][9], foam cores [10,11] and lattice cores [12][13][14].…”

Section: Introductionmentioning

confidence: 99%

Structural response of the U-type corrugated core sandwich panel used in ship structures under the lateral quasi-static compression load

Liu

Zong

et al. 2022

Marine Structures

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Experimental Analysis of the Crushing of Honeycomb Cores Under Compression

Cited by 16 publications

References 19 publications

Fabrication, characterization and mechanical testing of carbon fiber sandwich composites with nanoparticle included polyurethane adhesives

Fabrication, characterization and mechanical testing of carbon fiber sandwich composites with nanoparticle included polyurethane adhesives

Effect of aluminum honeycomb core milling defects on mechanical properties of sandwich structure

Structural response of the U-type corrugated core sandwich panel used in ship structures under the lateral quasi-static compression load

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