scholarly journals Selected Tribological Properties and Vibrations in the Base Resonance Zone of the Polymer Composite Used in the Aviation Industry

Materials ◽  
2020 ◽  
Vol 13 (6) ◽  
pp. 1364 ◽  
Author(s):  
Aneta Krzyzak ◽  
Ewelina Kosicka ◽  
Marek Borowiec ◽  
Robert Szczepaniak
Keyword(s):  
Composite Materials ◽  
Abrasive Wear ◽  
Polymer Composite ◽  
Tribological Properties ◽  
Empirical Evaluation ◽  
Global Market ◽  
Aviation Industry ◽  
Wear Process ◽  
Resonance Zone ◽  
Starting Point

The revolution in the global market of composite materials is evidenced by their increasing use in such segments as the transport, aviation, and wind industries. The innovative aspect of this research is the methodology approach, based on the simultaneous analysis of mechanical and tribological loads of composite materials, which are intended for practical use in the construction of aviation parts. Simultaneously, the methodology allows the composition of the composites used in aviation to be optimized. Therefore, the presented tests show the undefined properties of the new material, which are necessary for verification at the application stage. They are also a starting point for further research planned by the authors related to the improvement of the tribological properties of this material. In this article, the selected mechanical and tribological properties of an aviation polymer composite are investigated with the matrix of L285-cured hardener H286 and six reinforcement layers of carbon fabric GG 280P/T. The structure of a polymer composite has a significant influence on its mechanical properties; thus, a tribological analysis in the context of abrasive wear in reciprocating the movement for the specified polymer composite was performed. Moreover, the research was expanded to dynamic analysis for the discussed composite. This is crucial knowledge of material dynamics in the context of aviation design for the conditions of resonance vibrations. For this reason, experimental dynamical investigations were performed to determine the basic resonance of the material and its dynamics behavior response. The research confirmed the assumed hypotheses related to the abrasive wear process for the newly developed material, as well as reporting an empirical evaluation of the dependencies of the resonance zone from the fabric orientation sets.

Evaluation of the properties of polymer composites with carbon nanotubes in the aspect of their abrasive wear

2019 ◽  
Vol 1 (95) ◽  
pp. 5-12 ◽  
Author(s):  
A. Krzyżak ◽  
E. Kosicka ◽  
R. Szczepaniak ◽  
T. Szymczak
Keyword(s):  
Carbon Nanotubes ◽  
Composite Materials ◽  
Bisphenol A ◽  
Abrasive Wear ◽  
Polymer Composites ◽  
Tribological Properties ◽  
Polymer Matrix Composites ◽  
Matrix Composites ◽  
Friction Modifier ◽  
The Impact

Purpose: Carbon nanotubes are used in composite materials due to the improvement of (including tribological) properties of composites, especially thermoplastic matrix composites. This demonstrates the potential of CNTs and the validity of research on determining the impact of this type of reinforcement on the composite materials under development. Design/methodology/approach: The article presents selected results of research on polymer composites made of C.E.S. R70 resin, C.E.S. H72 hardener with the addition of a physical friction modifier (CNTs) with a percentage by volume of 18.16% and 24.42%, respectively, which also acts as a reinforcement. The produced material was subjected to hardness measurements according to the Shore method and EDS analysis. The study of abrasive wear in reciprocating movement was carried out using the Taber Linear Abraser model 5750 tribotester and a precision weight. The surface topography of the composite material after tribological tests was determined using scanning electron microscopy (SEM). Some of the mentioned tests were carried out on samples made only of resin, used as the matrix of the tested polymer composite. Findings: Carbon nanotubes used in polymer matrix composites, including bisphenol A/F epoxy resin have an influence on the tribological properties of the material. The addition of carbon nanotubes contributed to a 24% increase in the Ra parameter relative to pure resin, to a level corresponding to rough grinding of steel. Research limitations/implications: The results of the tests indicate the need to continue research in order to optimize the composition of composites in terms of operating parameters of friction nodes in broadly understood aviation. Originality/value: The analysed literature did not find any studies on the impact of the addition of carbon nanotubes on epoxy resins based on bisphenol A/F. Due to the wide scope of application of such resins, the properties of such composite materials in which carbon nanotubes are the reinforcing phase have been investigated.

scholarly journals ПЕРСПЕКТИВИ РОСТУ ВИКОРИСТАННЯ ТЕРМОПЛАСТИЧНИХ КОМПОЗИЦІЙНИХ МАТЕРІАЛІВ У СВІТОВОМУ АВІАБУДУВАННІ

2020 ◽  
pp. 61-75
Author(s):  
Сергей Андреевич Бычков ◽  
Александр Витальевич Гайдачук ◽  
Алексей Викторович Андреев ◽  
Wang Bo
Keyword(s):  
Composite Materials ◽  
Polymer Composite ◽  
Polymer Composite Materials ◽  
Aviation Industry ◽  
Special Role ◽  
Aircraft Structures ◽  
Aircraft Manufacturing ◽  
Production Processes ◽  
High Level ◽  
The Cost

It is shown that in the complex problem of permanent increase in the competitiveness of aircraft, a special role is played by the increasing use of polymer composite materials in aircraft structures of the transport category every year. An important role is played not only by the rational choice of structural and technological solutions of their units and assemblies, but also by the use of new composite materials to reduce the cost and production time of aircraft structures, which greatly contributes to the implementation of high flight technological and economic characteristics of competitive aircraft in the global market for sales and services. A review and analysis of the development of new composite materials and technologies for their processing into products, discussed at the annual international exhibition Sampe 2019. From an analysis of the results of the materials of the exhibition and conferences held within its framework, it follows that the global aviation industry is paying more and more attention to the study of structural thermoplastics and the development of new technological processes associated with these materials, in particular, welding. In the field of aircraft manufacturing, various companies and institutes are working to optimize and reduce the cost of production processes for parts from polymer composite materials, especially in the direction of autoclave-free production technologies. New developments of leading aircraft manufacturers, in particular AIRBUS, for the creation of large-sized responsible high-load structural elements of aircraft from polymer composite materials with a thermoplastic matrix are presented. Of particular note is 3D printing technology, which aircraft manufacturers have successfully begun to use for the manufacture of aircraft parts. It is noted that this technology allows not only to reduce the production cycle of manufacturing parts, but also significantly reduce the energy intensity of processes, which positively affects the cost of products. During a visit to the AIRBUS factory in Nantes, a high level of automation of production processes for manufacturing parts from polymer composite materials with a large number of laying, winding machines, CNC machines, robots was noted, which is due to a significant production program for the A350XWB and A400M aircraft with a high degree of automation of production processes, and also a very high level of safety and labor protection.

scholarly journals КЛАСИФІКАЦІЙНИЙ АСПЕКТ МЕТРОЛОГІЧНОГО ЗА-БЕЗПЕЧЕННЯ АВІАЦІЙНИХ КОНСТРУКЦІЙ З ПОЛІМЕРНИХ КОМПОЗИЦІЙНИХ МАТЕРІАЛІВ

2021 ◽  
pp. 65-77
Author(s):  
Wang Bo ◽  
С. А. Бычков ◽  
А. В. Гайдачук ◽  
А. В. Андреев ◽  
М. Н. Журибеда
Keyword(s):  
Life Cycle ◽  
Composite Materials ◽  
Polymer Composite ◽  
Metrological Support ◽  
Composite Structures ◽  
Global Market ◽  
Polymer Composite Materials ◽  
Classification Approach ◽  
Quality Of Products ◽  
High Level

An analysis of the classification aspect of metrological support of aviation structures from polymer composite materials was carried out.It is shown that the effectiveness of the objects under consideration is predetermined by their competitiveness in the global market for sales and services. One of the important components of the multidimensional efficiency of the use of polymer composite materials in the aircraft of the transport category is metrological support at all stages of creating composite structures.It was noted that the main objectives of the qualimetry of aviation structures made of polymer composite materials is to ensure the unity and accuracy, high quality products, reduce the cycle of its production, cost, reliability, and the same operation of operation.The achievement of the objectives of metrological support and challenges facing it is formed on the basis of a classification approach to the analysis of the main stages of the life cycle of the existence of composite structures, including an analysis of the effectiveness of aircraft constructions from polymer composite materials, which constitute the stage of their design and production, as well as tests, operation, disposal and forecast of perspectives Growth of the quality of products from polymer composite materials.A classifier of the stages of the life cycle of aircraft of the transport category of polymer composite materials were proposed, its top-level decomposition was carried out, including the composition of the species, classes, subclasses, groups and subgroups and their analysis was carried out. In the proposed classifier, starting with subclasses, previewed backup blocks, the need to use which may occur upon subsequent analysis of each stage.The proposed classification approach to the metrological support of composite structures and its further development on all the main stages of the life cycle of their existence, it is one of the most important components of the implementation of a high level of competitiveness of domestic aircraft transport categories in the global sales and services market.

scholarly journals Fabrication and Experimental Analysis of Treated Snake Grass Fiber Reinforced with Polyester Composite

2021 ◽  
Vol 2021 ◽  
pp. 1-13
Author(s):  
I. Jenish ◽  
A. Felix Sahayaraj ◽  
M. Appadurai ◽  
E. Fantin Irudaya Raj ◽  
P. Suresh ◽  
...  
Keyword(s):  
Composite Materials ◽  
Polymer Composite ◽  
Tribological Properties ◽  
Natural Fiber ◽  
Alkali Treatment ◽  
Fiber Reinforced Polymer ◽  
Fiber Reinforced ◽  
Fiber Reinforced Composite ◽  
Reinforced Composite ◽  
Reinforced Polymer

The selection of fiber is predominant for natural fiber-reinforced polymer composite materials, which should have easy extraction and good bonding with considerable strength. In this paper, some chemical treatments were done on the fiber material to increase interfacial bonding between the snake grass fiber (Sansevieria ehrenbergii) and polyester matrix, such as alkali treatment (NaOH), potassium permanganate treatment, sodium carbonate treatment, hydrogen peroxide treatment, and calcium carbonate treatment. The chopped snake grass fiber-reinforced polymer composite material was prepared by keeping 25 wt.% of fiber and 30 mm fiber length reinforced with an unsaturated polyester resin that was cured with the help of the catalyst methyl ethyl ketone peroxide (MEPK). Cobalt naphthenate was used as an accelerator. Tribological properties were discussed for the highly potential sample with the help of a pin-on-disc wear tester, and the results were analysed by the Taguchi L9 orthogonal array. This paper exhibited the best mechanical and tribological properties among those chemical-treated fibers used in fiber-reinforced composite materials and untreated fibers used in fiber-reinforced composite materials. CaCO3 treatment provided higher tensile strength (45 MPa), impact strength (3.35 J), and hardness (27 BHN). Finally, the mechanical and tribological characterization of the samples was done with the aid of SEM (scanning electron microscope).

Investigation of tribological properties of polymer composite materials based on bismaleimide binder

2011 ◽  
Vol 4 (2) ◽  
pp. 136-137 ◽  
Author(s):  
S. M. Terekhina ◽  
G. V. Malysheva ◽  
I. M. Bulanov ◽  
T. V. Tarasova
Keyword(s):  
Composite Materials ◽  
Polymer Composite ◽  
Tribological Properties ◽  
Polymer Composite Materials

scholarly journals Determination of the influence of a filler on the properties of composite materials based on polytetrafluorothylene for tribosystems of mechanisms and machines

2021 ◽  
Vol 4 (12(112)) ◽  
pp. 61-70
Author(s):  
Volodymyr Dudin ◽  
Dmytro Makarenko ◽  
Oleksii Derkach ◽  
Yevhen Muranov
Keyword(s):  
Composite Material ◽  
Composite Materials ◽  
Carbon Fiber ◽  
Polymer Composite ◽  
Tribological Properties ◽  
Mechanical Characteristics ◽  
Low Cost ◽  
Polymer Composite Material ◽  
Basic Material ◽  
Operating Modes

This paper reports a comprehensive laboratory study into the thermophysical, physical-mechanical characteristics, and tribological properties of the designed composite materials based on polytetrafluoroethylene. In the structures of machines and mechanisms, a significant role belongs to the tribological conjugations made from polymeric and polymer-composite materials. The reliability of machines, in general, depends to a large extent on the reliability of movable connections. Composite materials of nonmetallic origin have a low cost, they are resistant to most aggressive chemicals and are capable of operating under conditions without lubrication. It was established that the characteristics and properties of materials must be adapted to the working conditions of separately considered tribological conjugations. The mechanisms of thermal destruction have been established, both in the basic material and the carbon fiber based on it. It was found that carbon fiber, regardless of its content (quantity) in the polymer-composite material based on polytetrafluoroethylene, is mainly oriented perpendicular to the force application plane. It was found that with an increase in the carbon fiber content from 10 to 40 % by weight, the heat capacity decreases by 16‒39 % compared to the main material. The optimal operating modes for the designed composite materials have been substantiated on the basis of a pv factor: under a dry friction mode – up to 4 MPa∙m/s; at friction with lubrication – up to 36.4 MPa∙m/s. The dependence has been established of the friction coefficient on the operating modes of a composite material based on polytetrafluoroethylene containing 20 % by weight of carbon fiber when lubricated with oil and water. The results reported here make it possible to synthesize the physical-mechanical characteristics and tribological properties of composite materials in accordance with the required modes of tribological conjugation.

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