Probabilistic Modeling of Adhesive-Latent Interaction of Structural Elements of Composite Materials

2020 ◽  
Vol 25 (1) ◽  
pp. 76-81
Author(s):  
A.A. Barzov ◽  
◽  
V.M. Korneeva ◽  
S.S. Korneev ◽  
A.V. Cherednichenko ◽  
...  
Keyword(s):  
Composite Materials ◽  
Polymer Composite ◽  
Probabilistic Model ◽  
Block Diagram ◽  
Polymer Composite Materials ◽  
Structural Elements ◽  
Adhesive Bonds ◽  
Kinetics Of ◽  
Adhesion Factor

A block diagram of the interaction of the main elements of polymer composite materials and a probabilistic model of their functioning are proposed. The double role of the adhesion factor of polymer composite materials is shown and the possibility of its optimization is established. The kinetics of fracture of polymer composite materials is analyzed taking into account the strength of adhesive bonds and prospects for further research are outlined.

Role of adsorption processes in formation of the structure and properties of polymer composite materials

1997 ◽  
Vol 29 (1) ◽  
pp. 60-64
Author(s):  
S. E. Artemenko ◽  
G. P. Ovchinnikova ◽  
I. S. Rodzivilova ◽  
N. N. Bukh
Keyword(s):  
Composite Materials ◽  
Polymer Composite ◽  
Polymer Composite Materials ◽  
Structure And Properties ◽  
Adsorption Processes

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

MODERN MATERIALS FOR THE AIRCRAFT CABIN

2021 ◽  
pp. 33-42
Author(s):  
E.A. Veshkin ◽  
◽  
R.A. Satdinov ◽  
A.A. Barannikov ◽  
◽  
...  
Keyword(s):  
Composite Materials ◽  
Polymer Composite ◽  
Air Conditioning ◽  
Polymer Composite Materials ◽  
Structural Elements ◽  
Aircraft Cabin ◽  
Air Conditioning Systems ◽  
Passenger Aircraft

The paper considers the latest technologies and polymer composite materials developed at FSUE «VIAM» and used in the manufacture of structural elements of a passenger aircraft cabin (namely: air conditioning systems, three-layer interior and floor panels) that meet the requirements of the Aviation Regulations AP-25 (Appendix F, Part I ), as well as the requirements for mechanical and mass characteristics. The developed products are made entirely from domestic components, which in turn reduces dependence on imported materials.

A Method of Evaluating the Curing Kinetics of Epoxy-Binder-Based Polymer Composite Materials

2020 ◽  
Vol 13 (2) ◽  
pp. 164-168
Author(s):  
Chen Yanyan ◽  
N. I. Khudoberdin ◽  
Pyi Phyo Maung ◽  
G. V. Malysheva
Keyword(s):  
Composite Materials ◽  
Polymer Composite ◽  
Curing Kinetics ◽  
Polymer Composite Materials ◽  
Epoxy Binder ◽  
Kinetics Of
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