Wyniki wyszukiwania - BazTech

1

Effect of boundary conditions and metal alloy layer on natural frequencies of fibre metal laminates

Rao Nandure Narayan, Sirisha Sirapu, Rao Pavuluri M.V., Bobba Sujith

Composites Theory and Practice

|

2023

|

R. 23, nr 2

97--103

EN

The natural frequencies and mode shapes of fibre metal laminates (FMLs) were numerically investigated and validated using commercially available finite element analysis software (ANSYS). Various grades of GLARE and FML were considered for free vibration analysis, and the effect of the central metal layer and aspect ratios on the frequencies were analysed for simply supported, clamped edge conditions. The obtained fundamental frequencies, natural frequencies and mode shapes comply with the available literature. The effect of the outermost metal layer on the natural frequencies was also investigated for various combinations of edge conditions. The obtained results indicate that there is a significant effect of the central and outermost metal layer on the natural frequencies, irrespective of the edge conditions and aspect (width/length) ratios.

2

Damage to inverse hybrid laminate structures: an analysis of shear strength test

Frankiewicz Mariusz, Ziółkowski Grzegorz, Dziedzic Robert, Osiecki Tomasz, Scholz Peter

Materials Science Poland

|

2022

|

Vol. 40, No. 1

130--144

EN

Hybrid laminates with continuous fiber reinforcement, such as glass reinforced aluminium laminate (GLARE), aramid reinforced aluminum laminate (ARALL), or carbon reinforced aluminum laminate (CARALL), have been developed to increase the lightweight potential and fatigue resistance applied for aircraft structures. However, the use of thermosetting matrices imposes material limitations regarding recycling, malleability, and manufacturing-cycle times. The inverse hybrid laminate approach is based on a continuous fiber-reinforced thermoplastic matrix, in which a metal insert is integrated. For efficient manufacturing of the novel composites in high-volume production processes, conventional sheet metal–forming methods have been applied. It helped to reduce the cycle times and the costs of the forming equipment compared to currently used hybrid laminate-processing technologies. The present study analyzes the damage to the inverse hybrid laminate structures resulting from the interlaminar shear strength test. The tests were performed for eight laminate material configurations, which differed by the type and directions of the reinforced glass and carbon fibers in the polyamide matrix and the number of the fiber-reinforced polymer (FRP) layers in the laminates. Industrial computed tomography and scanning electron microscopy were used for analysis. Observed damages, including fiber–matrix debonding, fiber breakages, matrix fractures, interfacial debonding, and delamination in selected areas of the material, are strictly dependent on the laminate configurations. FRP layers reinforced by fibers perpendicular to the bending axis presented better resistance against fractures of the matrix, but their adhesion to the aluminum inserts was lower than in layers reinforced by fibers parallel to the bending axis.

3

Hybrid sandwich panels: a review

Sandeep S. H., Srinivasa C. V.

International Journal of Applied Mechanics and Engineering

|

2020

|

Vol. 25, no. 3

64--85

EN

A high specific stiffness, high specific strength, and tailoring the properties for specific application hale attracted the attention of the researchers to work in the field of laminated composites and Sandwich structures. Rapid use of these laminated composites and Sandwich structures necessitated the development of new theories that suitable for the bending, buckling and vibration analysis. Many articles were published on free vibration of beams, plates, shells laminated composites and sandwich structures. In this article, a review on free vibration analysis of shear deformable isotropic beams, plates, shells, laminated composites and sandwich structures based on various theories and the exact solution is presented. In addition to this, the literature on finite element modeling of beams, plates, shells laminated composites and sandwich structures based on classical and refined theories is also reviewed. The present article is an attempt to review the available literature, made in the past few decades on free flexural vibration response of Fiber Metal laminated Composites and Sandwich panels using different analytical models, numerical techniques, and experimental methods.

4

Przegląd konstrukcji warstwowych

Owczarzak W.

Autobusy : technika, eksploatacja, systemy transportowe

|

2016

|

R. 17, nr 6

1068--1070

PL

Artykuł przedstawia konstrukcje warstwowe typu SPS (Sandwich Plate System), SIP (Structural Insulated Panels) oraz hybrydowe (laminaty metalowo-włókniste FML) a także ich budowę, właściwości oraz wykorzystanie w różnych sektorach przemysłu.

EN

The article discusses most commonly used sandwich systems such as: SMS (Sandwich Plate System), SIP (Structural Insulated Panels) and hybrid FML (fibre-metal laminate), as well as it's structure, properties and practical application in various branches of industry.

5

Badania hybrydowych kompozytów warstwowych typu FML (Fibre Metal Laminate)

Godzimirski J., Pietras A.

Technologia i Automatyzacja Montażu

|

2012

|

nr 2

52-56

EN

Laminar hybrid composites sort FML are laminates made of adhesively bonded thin metal sheets and layers of polymer composite reinforced by fibers. These materials show an intermediate property between metals and polymer composite reinforced by fibers. Limited application of these new materials is motivated by narrow expertise of their strength. The purpose of the research was to estimate the failure that might influence the FML material loading method. The numerical calculations were provided in this experiment with the elastic-plastic properties of metal component and orthotropic of composite components. It was pointed out that laminar hybrid composite may be damaged due to not only the strength exceed of components, but also as results of delamination because of the adhesive bonds failure.