Effect of long-term thermal cycling and moisture on heated Fibre Metal Laminates and glass-fibre epoxy composites

2019 ◽  
Vol 210 ◽  
pp. 500-508 ◽  
Author(s):  
Michiel Hagenbeek ◽  
Jos Sinke
Keyword(s):  
Thermal Cycling ◽  
Glass Fibre ◽  
Epoxy Composites ◽  
Fibre Metal Laminates ◽  
Fibre Metal

scholarly journals Creep behaviour of FM906 glass-fibre epoxy as used in heated fibre metal laminates

2019 ◽  
Vol 53 (26-27) ◽  
pp. 3829-3840
Author(s):  
Michiel Hagenbeek ◽  
Marcelo M Dias ◽  
Jos Sinke ◽  
Kaspar Jansen
Keyword(s):  
Glass Fibre ◽  
Creep Behaviour ◽  
Repeated Heating ◽  
Fibre Metal Laminates ◽  
Viscoelastic Creep ◽  
Linear Viscoelastic ◽  
Fibre Metal ◽  
Effects Of Temperature ◽  
Term Creep

An innovative deicing system for aircraft leading edges has been developed which integrates heater elements into fibre metal laminates. Such an electrical system can lead to weight reductions and more efficient performances compared to conventional bleed air systems. However, the combination of thermal and mechanical loadings also raises new questions on the durability of such a structure, in particular due to the repeated heating to elevated temperature. The linear viscoelastic creep behaviour, including the effects of temperature and ageing, is therefore investigated for manufactured FM906 glass-fibre epoxy composite as used in heated GLARE. A master curve is derived based on the time–temperature and time–age superposition. The effect of physical ageing during loading is included in a long-term creep prediction.

Stretch Formability Behaviour of Glass Fibre Reinforced Nanoclay on Fiber Metal Laminated Composites

2018 ◽  
Vol 10 (2) ◽  
Author(s):  
K. Logesh ◽  
V.K Bupesh Raja ◽  
C. Krishnaraj
Keyword(s):  
Ductile Fracture ◽  
Epoxy Resin ◽  
Glass Fibre ◽  
Weight Ratio ◽  
High Strength ◽  
Core Material ◽  
Fibre Metal Laminates ◽  
Sem Image ◽  
Pull Out ◽  
Fibre Metal

Innovations and research in material processing have brought forward new and improvised materials that are applied in body panels of automobiles, aircraft cabins and railway wagons. These materials are used widely is because of their good mechanical properties and their high strength to weight ratio. In this paper Fibre Metal Laminates (FMLs) were added with organo modified montmorillonite (MMT) commonly known as nanoclay along with epoxy resin. The homogeneous dispersion of nanoclay in epoxy resin is accomplished by a hand stirrer dispersion method in ethanol. The FML material was processed by hand layup method. In this study the aluminium alloy 5052-H32 was used as a skin material and glass fibre (woven roving) used as core material which is bounded by epoxy with 5 wt.% nano clay (closet 30B). The fabricated sandwich material was cut by using water jet machine as per IS standards for testing. The fabricated material subjected to erichsen cupping test and was observed under Scanning Electron Microscope (SEM). The results from SEM image analysis indicated that the FML had fibre pull out and surface cracks were obtained in the skin material. Progressive loading resulted in ductile fracture which is absorbed in the specimen. Fibres came across brittle failure and the skin through ductile fracture. Non-uniform distribution of reinforcement is observed in the material, SEM micrographs revealed fibre cracks which were oriented in line to the direction of crack growth on the skin material. This study shows that these fibre metal laminates can be safely applied in automotive field.

scholarly journals Short-beam shear fatigue life assessment of thermally cycled carbon–aluminium laminates with protective glass interlayers

2021 ◽  
Vol 21 (2) ◽  
Author(s):  
Barbara Surowska ◽  
Konrad Dadej ◽  
Patryk Jakubczak ◽  
Jarosław Bieniaś
Keyword(s):  
Fatigue Life ◽  
Thermal Cycling ◽  
Construction Materials ◽  
Life Assessment ◽  
Al Alloy ◽  
Thermal Cycles ◽  
Fibre Metal Laminates ◽  
Stiffness Reduction ◽  
Fatigue Damage Accumulation ◽  
Fibre Metal

AbstractFibre metal laminates (FMLs) are attractive construction materials, especially for use in aerospace and transport facilities. Throughout their service life, thin-walled structures made of FMLs are exposed to static and dynamic loads, as well as corrosion and the unfavourable influence of environmental conditions. The paper presents an experimental analysis of the combined mechanical and environmental long-term behaviour of carbon-based fibre metal laminates and their variants with protective glass layers. The Al alloy/CFRP and Al alloy/GFRP/CFRP laminates in a 3/2 configuration were used. The tested laminates were subjected to 1500 thermal cycles with a temperature range of 130 °C. The static and fatigue interlaminar shear strengths were tested before and after thermal conditioning. It was shown that the stable stiffness reduction in the tested laminates was observed with increasing fatigue cycles, due to the progressive fatigue damage accumulation. The thermally cycled laminates feature slightly smoother stiffness loss, while a more rapid decrease was observed in thermally untreated laminates. Moreover, the fatigue life of the tested laminates subjected to thermal cycling revealed nine times fewer fatigue cycles of laminates with glass protectors after thermal cycles in comparison to the laminates not subjected to thermal cycling.

Charpy Impact Response of Fibre-Metal Laminates Based on Woven Kenaf/Glass Fibre Reinforced Polypropylene

2020 ◽  
Vol 8 (2) ◽  
pp. 58
Author(s):  
Dhar Malingam Sivakumar ◽  
Lin Feng Ng ◽  
Kathiravan Subramaniam ◽  
Omar Bapokutty ◽  
Nisallini Pilvamangalam ◽  
...  
Keyword(s):  
Glass Fibre ◽  
Charpy Impact ◽  
Impact Response ◽  
Fibre Metal Laminates ◽  
Glass Fibre Reinforced ◽  
Fibre Metal ◽  
Woven Kenaf

scholarly journals Woven and Unidirectional Glass-Aluminium Fibre Metal Laminates (FML): Quasi-Static Indentation Properties

2019 ◽  
Vol 8 (4) ◽  
pp. 6906-6911
Keyword(s):  
Energy Absorption ◽  
Glass Fibre ◽  
Thin Sheet ◽  
Sheet Thickness ◽  
Indentation Test ◽  
Matrix Cracking ◽  
Axis Orientation ◽  
Fibre Metal Laminates ◽  
Static Indentation ◽  
Fibre Metal

In this study, the effect of fibre arrangement and aluminium thin sheet on quasi-static indentation properties of fibre metal laminates (FML) based on glass fibre reinforced polymer composite (GFRP) and Aluminium (Al) was investigated. The woven and unidirectional types of glass fibre prepreg and 0.5mm, 1mm and 2 mm of Al sheet thickness were used in the fabrication of Glass fibre-Al FML systems. The GFRP and FML samples were fabricated using a combination of hand lay–up and hot press methods. Quasi-static indentation test was performed according to ASTM D6264. The results showed that the woven type of GFRP and FMLs exhibited the highest energy absorption as compared to those of unidirectional of GFRP and FMLs. It was observed that for the woven type specimens of GFRP and FMLs, the matrix cracking and fibre breakage/delamination triggered in weft and wrap direction, which showed diamond-shaped damage. While the damage surface of unidirectional GFRP and FMLs showed single axis orientation damage type that lateral with the direction of the fibre namely fibre splitting mechanism. The FML2 systems for both woven and unidirectional, that used 2mm thickness of Al, demonstrated the highest energy absorption when compared to the other FML systems. This shows that FMLs absorbed more energy when thicker Al sheet was used.

scholarly journals Thermal cycling of (heated) fibre metal laminates

2016 ◽  
Vol 152 ◽  
pp. 106-116 ◽  
Author(s):  
Bernhard Müller ◽  
Michiel Hagenbeek ◽  
Jos Sinke
Keyword(s):  
Thermal Cycling ◽  
Fibre Metal Laminates ◽  
Fibre Metal

Abrasive water jet machining of glass fibre metal laminates

2002 ◽  
Vol 216 (11) ◽  
pp. 1459-1469 ◽  
Author(s):  
S Paul ◽  
A M Hoogstrate ◽  
R van Praag
Keyword(s):  
Glass Fibre ◽  
Quality Parameter ◽  
Water Jet ◽  
Burr Formation ◽  
Quantitative Relation ◽  
Abrasive Water Jet ◽  
Fibre Metal Laminates ◽  
Glass Fibres ◽  
Fibre Metal ◽  
Ability Parameter

Glass fibre metal laminates (GFMLs) have been machined successfully with an abrasive water jet. The mechanism of material removal of the aluminium layer is by microcutting and plastic deformation similar to that observed in machining ductile materials. The glass fibres that are transverse to the direction of work travel are machined by microcutting and/or brittle fracture. The glass fibres that are parallel to the direction of work travel are removed in bulk by brittle feature. The fibres undergo substantial secondary erosion. No delamination has been observed except for the laminates with thinner aluminium layers. The quality parameters associated with kerf, the taper quality parameter, the amount of burr formation, the straightness of the edge at the exit side, etc., correlate quite well with the cutting ability parameter. A quantitative relation, irrespective of the structure and build-up of the laminates, has been attempted between the taper quality parameter and the cutting ability parameter.

Sign in / Sign up

Export Citation Format

Share Document