COMPARATIVE EVALUATION OF FIRE POLYMER COMPOSITE MATERIALS USED TO THE MANUFACTURE OF STRUCTURAL ELEMENTS FOR AIRCRAFTS

2014 ◽  
Vol 23 (2) ◽  
pp. 20-27
Author(s):  
E. N. SHURKOVA ◽  
◽  
O. S. VOLNYJ ◽  
A. N. LUTSENKO ◽  
S. L. BARBOTKO ◽  
...  
Keyword(s):  
Composite Materials ◽  
Polymer Composite ◽  
Comparative Evaluation ◽  
Polymer Composite Materials ◽  
Structural Elements ◽  
Materials Used

Thermoplastic Characteristics of Polymer Composite Materials Used for the Manufacture of Ship Systems Pipelines

2020 ◽  
Vol 869 ◽  
pp. 7-14
Author(s):  
Gia Viet Ngo
Keyword(s):  
Composite Materials ◽  
Polymer Composite ◽  
Raw Materials ◽  
Fire Hazard ◽  
Sheet Material ◽  
Polymer Composite Materials ◽  
Domestic Industry ◽  
Thermoplastic Matrix ◽  
Materials Used ◽  
Physical And Mechanical Characteristics

The article presents thermoplastic characteristics of polymer composite materials developed on domestic raw materials on a thermoplastic matrix-injection material of the VTP-7 brand based on polyaryl sulfones (polysulfone PSU) plastic and sheet material of the VKU-44 brand based on PSU and carbon unidirectional tape ELUR 0.08 PA. In the article, the author considered the modification method of thermoplastic polymers to impart functional properties and mechanisms of their action. It is shown that the developed materials have no analogues in the domestic industry. According to the level of physical and mechanical characteristics, fire-hazard properties and heat resistance, the developed polymer composite materials (PCM) fully meets the requirements for modern thermoplastic PCM, and is not inferior to foreign analogues.

scholarly journals DEVELOPMENT OF POLYMERIC COMPOSITE MATERIALS BASED ON THERMOPLASTIC ELASTOMERS

2016 ◽  
Vol 1 (12) ◽  
pp. 195-199
Author(s):  
Прут ◽  
Eduard Prut ◽  
Черкашина ◽  
Natalya Cherkashina ◽  
Ястребинская ◽  
...  
Keyword(s):  
Composite Materials ◽  
Polymer Composite ◽  
Filler Content ◽  
Sol Gel ◽  
Polymeric Composite ◽  
Thermoplastic Elastomers ◽  
Polymer Composite Materials ◽  
Dynamic Vulcanization ◽  
The Matrix ◽  
Materials Used

This paper presents data on the development of polymer composite materials based on thermoplastic elastomers. As starting materials for the synthesis of the matrix components were selected as follows: isotactic polypropylene and ternary ethylene-propylene-diene elastomer (EPDM). Diene component in EPDM are ethylidene norbornene composition in an amount of 4-5%. Dynamic vulcanization was carried out using the elastomer element sulfur. The filler polymer composite materials used silica gel with dimethyl polysiloxane. Synthesis was carried out by filling the sol-gel technology. The filler content in the composite varied from 10 to 80% by weight. Mixing of filler and the matrix was performed in a laboratory twin-rotor mixer, type "Brabender". It is found that the maximum possible filler content of the matrix used was 80%. With the introduction of more filler mixing of the components it has been difficult. When the filler content from 10 to 70% of parameters such as tensile strength, flexural strength and modulus of longitudinal elasticity increasing and administered at higher filler and 80 wt%. markedly reduced. Thus, it can be concluded that the content of filler in the composite is 70%. Further research should be directed to the evaluation of the radiation resistance of the developed composite materials.

Method of parametric optimization in the problems of passenger airliner design

2020 ◽  
Author(s):  
A.A. Bolshikh ◽  
V.P. Eremin
Keyword(s):  
Composite Materials ◽  
Polymer Composite ◽  
Parametric Optimization ◽  
Polymer Composite Materials ◽  
Preliminary Design ◽  
Structural Elements ◽  
The Finite Element Method ◽  
Current Trends ◽  
Box Structure ◽  
Mass Perfection

The paper describes current trends in the design of load-bearing structural elements of modern airliners made using polymer composite materials. In modern passenger airliners, polymer composite materials are used to ensure mass perfection of both lightly loaded elements and critical units, including wing and fin boxes. By means of the finite element method, a box model was created using shell finite elements. Parametric optimization was carried out with account for the anisotropic properties of structural materials. The purpose of the work is to develop a methodology for calculating the structural strength elements of the box and justify the required thicknesses with restrictions on compressive / tensile deformations and loss of stability. The developed methodology makes it possible to obtain a box structure with a minimum mass, while maintaining the necessary stiffness and strength characteristics at the stage of preliminary design.

IMPACT OF HIGH VOLTAGE ELECTRIC DISCHARGES ON THE CURED POLYMER COMPOSITE MATERIALS, MODIFIED IN A MICROWAVE ELECTROMAGNETIC FIELD

2020 ◽  
pp. 6-12
Author(s):  
I. V. Zlobina ◽  
A. A. Korotich
Keyword(s):  
Electromagnetic Field ◽  
Surface Layer ◽  
Composite Materials ◽  
Carbon Fiber ◽  
Minimum Wage ◽  
Polymer Composite ◽  
High Voltage ◽  
Polymer Composite Materials ◽  
Structural Elements ◽  
The Impact

Due to the widespread use of carbon fiber-reinforced polymer composite materials (PCM) in the structural elements of aircraft with a distributed surface layer of lightning-proof coating (MFP) in the form of metal grids to reduce the risk of lightning strikes and the possibility of increasing their strength characteristics by processing in the microwave electromagnetic field, the need to study the impact of this method of processing on the resistance of PCM to high voltage electrical discharges. The studies of the impact of the discharge voltage 180…200 kV on samples of PCM with the minimum wage and no minimum wage. It is established that pretreatment of samples of the cured polymer composite MW in a microwave electromagnetic field energy flux density (17…18)104 µw/cm2 does not degrade their molniezaschita characteristics and contributes to reducing the size of the damaged area up to 1.5 times. Samples processed in the microwave electromagnetic field without MSP do not have delaminations and burns in contrast to the control ones. The obtained results indicate the possibility of strengthening treatment in the microwave electromagnetic field of structural elements of carbon fiber distributed in the surface layer of the MSP in the form of a metal grid.

scholarly journals Energy-saving technology of production of elements of building structures from polymer materials

2021 ◽  
pp. 41-48
Author(s):  
A.V. Kondratiev ◽  
О.О. Prontsevych
Keyword(s):  
Composite Materials ◽  
Energy Saving ◽  
Polymer Composite ◽  
Technological Process ◽  
Polymer Materials ◽  
Polymer Composite Materials ◽  
Gas Evolution ◽  
Curing Process ◽  
Structural Elements ◽  
Energy Saving Technology

Problem statement. At present, the increase in the efficiency of the technology for the production of composite structural elements is associated with high energy costs. In this regard, the implementation of ways to optimize the parameters of the technological process of manufacturing polymer composite materials is of great importance. The purpose of the article is to optimize the modes of impregnation and curing of thermosetting binders and polymer composite materials based on them in combination with the kinetics of gas evolution and control of all stages of the technological process. Results. An energy-saving technology for molding composite structural elements of buildings and structures has been developed, which provides a reduction in the duration of the curing process of polymer materials, depending on the type of binder. The technology makes it possible to control the speed and degree of curing of a thermosetting binder by changing the tangent of the dielectric loss angle and electrical conductivity. Scientific novelty and practical significance. The approach and the electrophysical method for optimizing the modes of impregnation and curing of composite products in combination with the control of all stages of the technological process have been further developed in relation to the elements of composite structures. The permissible values of the curing parameters have been established according to the optimized mode of a number of thermosetting binders: heating rates, isotherm temperatures, and holding time at them. At the same time, the achieved optimal curing times for binders BFOS, LBS-4, ENFB, 5-211B using the new technology is 2.4; 1.8; 3.0; 2.3; 2.0 and 1.2 times less than according to known technologies. The results obtained guarantee the quality of the resulting composite product and are recommended for accelerating the curing process of polymer materials. Keywords: optimization; technological regime; impregnation; curing; thermosetting binders; gas evolution; stage control

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