On the interfacial adhesion of fiber metal laminates using surface modified aluminum 7475 alloy for aviation industries – a study

Thirukumaran, M.; Jappes, J.T. Winowlin; Siva, I.; Ramanathan, Rajajeyaganthan; Brintha, N.C.

doi:10.1080/01694243.2019.1680007

Cited by 7 publications

(5 citation statements)

References 22 publications

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Section: Experiments and Methodsmentioning

confidence: 99%

“…C3: After C2, the specimen was immersed in Fe 2 (SO 4 ) 3 solution de-ionized water with sulphuric acid (185 ml/l) and ferric sulphate (127 g/l) at 65˚C for 8 min after being treated with 2.5 M alkali solution (100 g/l, 60˚C for 1 min). 13 Laminate fabrication: Fibre metal laminates were created by alternately stacking the conditions C1, C2, and C3 of three aluminium (AA) sheets with interlaying of E-glass fibre (GF) chopped strand mat, followed by the sequence AA/GF/AA/GF/AA, as illustrated in Figure 1. To make bonding between the alternate laminas of aluminium and glass fibre, the epoxy was manually applied.…”

Section: Laminate Fabricationmentioning

confidence: 99%

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Experimental and statistical evaluation of wear and friction behaviour on AA 7475/GFRP multi-stacked fibre metal laminates

Manoharan¹

2022

Proceedings of the Institution of Mechanical Engineers, Part J:

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Fibre metal laminates (FMLs) are used to make lugs and cargo doors in the aviation industry. In both the assembly and service of aircraft, friction and wear are unavoidable. This paper explores the experimental and statistical evaluation of wear and friction response of multi-stacked glass laminate aluminum reinforced epoxy (GLARE) under dry sliding conditions. Testing was conducted by a pin on disc machine with four parameters namely specimen condition, contact pressure, sliding velocity, and sliding distance. Material heterogeneity is a factor that is supposed to improve the damping of the hybrid system. The design of experiment (DOE) reveals that specimen condition significantly promotes wear and friction. On the other hand, sliding velocity did not effectively contribute to loading the hybrid towards the dry slide. The best specimen condition for wear was C2, with contact pressure of 50 MPa, sliding velocity of 1 m/s, and sliding distance of 3000 m. For friction, best specimen condition C3, with contact pressure 100 MPa, sliding velocity 1 m/s, and sliding distance 1000 m. Scanning electron microscopy was also used to investigate the wear mechanisms on the worn surface. A linear regression model shows a 98% correlation of experimental with predicted values.

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Section: Experiments and Methodsmentioning

confidence: 99%

Section: Laminate Fabricationmentioning

confidence: 99%

Experimental and statistical evaluation of wear and friction behaviour on AA 7475/GFRP multi-stacked fibre metal laminates

Manoharan¹

2022

Proceedings of the Institution of Mechanical Engineers, Part J:

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“…49 FMLs composed of innovative constituents have been developed and investigated after high-strength alloys and composite materials become more widespread. However, most of the studies generally focused on the mechanical properties, [50][51][52][53][54] especially tensile response, 55,56 interface characterization [57][58][59][60] and impact behavior [61][62][63][64] of FMLs with various stacking sequences of sandwich configuration. Literature data from the research into the mechanical characterization of the HLs with composite joined on one side of a metal are quite scarce.…”

Section: Introductionmentioning

confidence: 99%

Bilayer AA7075-thermoplastic composite structures manufactured by hot pressing: Effect of glass fiber amount of polypropylene composite on mechanical properties

Öztoprak

2023

Journal of Thermoplastic Composite Materials

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This article presents a research into the development of novel Hybrid Laminates (HLs) prepared with the use of hot-pressing method. Two types of HLs are fabricated through the composite coating with different fiber amounts (40 and 50% wt.) of only one surface of 7075-O Al alloy substrate. Effects of the fiber contents of the thermoplastic composite in the hybrid structures are investigated with regards to the tensile and flexural properties. The influence of bending load applied from different surfaces on flexural responses is also evaluated. The tensile test results indicate that the increased fiber ratio slightly affects the failure load of composite layer in the HLs. On the other hand, the flexural strength decreases with the increasing fiber amount in the HLs whether the three-point bending is performed on the Al surface or the composite layer. Scanning electron microscopy (SEM) is used to study the fracture surfaces after the mechanical characterization. From the SEM observations, it has been realized that fiber/matrix debonding is the key failure mechanism during the tensile tests. The failure mode of both HLs is delamination in the PP composite at the tensile side when the bending applied from the Al layer.

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“…8 The interfacial adhesion and tensile strength were higher with iron (III) sulfate compared to NaOH and Potassium dichromate etchants on aluminium based FMLs. 9 The wear properties were superior with satin weave (SW) and satin weave-steel metal mesh (SW-SMM) composites than 2D (plain-woven) and 3D (knitted) fabric composites. Also, the SMM composites had a better ILSS of 56%, 10%, and 18% on 2D, 3D, and SW composites.…”

Section: Introductionmentioning

confidence: 99%

Tribo-mechanical analysis of magnesium-based fibre metal laminates for structural applications

Priya

Arputham

2022

Proceedings of the Institution of Mechanical Engineers, Part J:

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Fibre metal laminates (FML) play a significant role in the aircraft industry. The present work is to achieve a high load bearing structure and wear resistant FML for airbus cargo floors and doors. An innovative attempt has been made to reveal the mechanical and tribological properties of the FML (Glass/AZ91D/Glass). The glass fibre used is of bi-diagonal fabric to enhance the shear properties of the FML. The laminates were prepared by hand layup technique, which was post compressed to a uniform shape in the compression moulding machine. Mechanical tests such as tensile, flexural, and low-velocity impact were conducted on the FML samples. The mechanical properties of the magnesium-based FML exhibit an excellent tensile strength of 227.3 MPa, the flexural strength of 231.3 MPa, and the energy absorbed by the plate are 93.648 J. These results were promising, and comparatively better than the conventional laminates in the case of load bearing structures. The wear was tested in Pin-on-Disc and the wear resistance was also found to be better than conventional laminates. The micro-structural analysis along the wear regime shows a prominent wear resistance and fewer cracks, due to the presence of AZ91D in the laminates.

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On the interfacial adhesion of fiber metal laminates using surface modified aluminum 7475 alloy for aviation industries – a study

Cited by 7 publications

References 22 publications

Experimental and statistical evaluation of wear and friction behaviour on AA 7475/GFRP multi-stacked fibre metal laminates

Experimental and statistical evaluation of wear and friction behaviour on AA 7475/GFRP multi-stacked fibre metal laminates

Bilayer AA7075-thermoplastic composite structures manufactured by hot pressing: Effect of glass fiber amount of polypropylene composite on mechanical properties

Tribo-mechanical analysis of magnesium-based fibre metal laminates for structural applications

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