Prediction of the adhesive fillet size for skin to honeycomb core bonding in ultra-light sandwich structures

Rion, J.; Leterrier, Y.; Månson, Jan‐Anders E.

doi:10.1016/j.compositesa.2008.05.022

Cited by 52 publications

(28 citation statements)

References 27 publications

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“…[16,17]) were found to be marginally effective and have numerous limitations restricting their application in practice due to producibility constraints, for example. [18] Therefore, a few studies have employed more compliant bondlayers in order to minimize the (most problematic) peel stresses. However, with this approach, the increase in strain-tolerance is achieved at the expense of reduced strength and stiffness of the joint.…”

Section: Introductionmentioning

confidence: 99%

Stress Reduction of 3D Printed Compliance‐Tailored Multilayers

et al. 2017

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Multilayered multi-material interfaces are encountered in an array of fields. Here, enhanced mechanical performance of such multi-material interfaces is demonstrated, focusing on strength and stiffness, by employing bondlayers with spatially-tuned elastic properties realized via 3D printing. Compliance of the bondlayer is varied along the bondlength with increased compliance at the ends to relieve stress concentrations. Experimental testing to failure of a tri-layered assembly in a single-lap joint configuration, including optical strain mapping, reveals that the stress and strain redistribution of the compliance-tailored bondlayer increases strength by 100% and toughness by 60%, compared to a constant modulus bondlayer, while maintaining the stiffness of the joint with the homogeneous stiff bondlayer. Analyses show that the stress concentrations for both peel and shear stress in the bondlayer have a global minimum when the compliant bond at the lap end comprises %10% of the bondlength, and further that increased multilayer performance also holds for long (relative to critical shear transfer length) bondlengths. Damage and failure resistance of multi-material interfaces can be improved substantially via the compliance-tailoring demonstrated here, with immediate relevance in additive manufacturing joining applications, and shows promise for generalized joining applications including adhesive bonding.

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Section: Introductionmentioning

confidence: 99%

Stress Reduction of 3D Printed Compliance‐Tailored Multilayers

et al. 2017

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“…parameters for honeycomb sandwich structures are 120 o C for 2h, whereupon the sandwich structures showed maximum mechanical properties that may be due to the formation of suitable and symmetrical fillets (Okada and Kortschot, 2002;Rion et al, 2008). Moreover, at these parameters, the honeycomb structures demonstrated the maximum peak loads prior to the deformation of the core and failure of upper facesheet.…”

Section: Resultsmentioning

confidence: 98%

Curing parameter optimization of the adhesive film in honeycomb sandwich structures through mechanical performance

Subhani¹

2019

Int. j. adv. appl. sci.

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In this investigation, honeycomb sandwich structures were manufactured for aerospace structural applications. The composite material of carbon fiber and epoxy matrix was utilized as the facesheet of sandwich structures while Nomex® honeycomb acted as the core material. For the bonding of facesheet with core, an epoxy-based adhesive film was used. To optimize the curing parameters of the adhesive film, a set of four curing temperatures, i.e., 100 o C, 110 o C 120 o C and 130 o C, and two curing times, i.e., 2h and 3h were applied.The prepared sandwich structures were tested under a three-point bend test to investigate the maximum mechanical properties. It was found that the temperature of 120 o C with the curing time of 2h provided the maximum mechanical properties and thus was selected as the optimized curing parameters of adhesive film.

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“…Moreover, a mechanical pre-processing of the metallic skins based on abrasion with sandpaper tends to remove the passive oxide layer adsorbed on the surfaces, and that enhances the chemical interaction between the skin and the adhesive and increases the surface roughness [12]. Higher quantities of adhesive tend to correlate with an improved mechanical performance of the structures [13][14][15][16]. The quality of the adhesion is mostly attributed to the amount and the distribution of the adhesive layer.…”

Section: Introductionmentioning

confidence: 99%

Sustainable sandwich structures made from bottle caps core and aluminium skins: A statistical approach

Oliveira

Panzera

Freire

et al. 2018

Thin-Walled Structures

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This work further investigates the manufacture and characterisation of a sustainable sandwich panel made from aluminium skins and a recycled thermoplastic bottle cap core, an innovative concept proposed in a previous paper. A full factorial design based on Design of Experiments (DoE) and Analysis of Variance (ANOVA) techniques has highlighted the complex influence of three manufacturing parameters (type of polymeric adhesive, adhesive layer thickness layer and core packing topology) on the absolute and specific physical and flexural properties of the panels. The ANOVA revealed that the use of higher amount of epoxy polymer led to enhanced panel strength and stiffness. The cell packing topology, however, did not provide a significant effect on most panel properties. Discarded bottle caps have proven to be a promising lightweight and inexpensive honeycomb component for structural applications.

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Prediction of the adhesive fillet size for skin to honeycomb core bonding in ultra-light sandwich structures

Cited by 52 publications

References 27 publications

Stress Reduction of 3D Printed Compliance‐Tailored Multilayers

Stress Reduction of 3D Printed Compliance‐Tailored Multilayers

Curing parameter optimization of the adhesive film in honeycomb sandwich structures through mechanical performance

Sustainable sandwich structures made from bottle caps core and aluminium skins: A statistical approach

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