Усиление внутреннего слоя многослойного композита базальтопластиком в виде сотовой структуры

2021 ◽  
Vol 27 (2) ◽  
pp. 205-216
Author(s):  
Г. П. Пономарева ◽  
◽  
И. М. Попова ◽  
О. М. Сладков ◽  
М. В. Пономарев ◽  
...  
Keyword(s):  
Mechanical Characteristics ◽  
Laminated Composite ◽  
Middle Layer ◽  
Epoxy Compound ◽  
Reaction Mass ◽  
Relative Deformation ◽  
Concentrated Load ◽  
Liquid Reaction ◽  
Constant Rate ◽  
Physical And Mechanical Characteristics

In our studies we present a multilayer structure consisting of outer layers of two-ply basalt composed of basalt fabric impregnated with an epoxy compound and an inner layer of polyurethane reinforced with basalt, having the same composition, formed in conjugate hexagonal prisms, and forming a cellular framework. The main part describes the technological sequence of obtaining basalt face layers, basalt hexagonal cellular frame, and filling it with a liquid reaction mass of rigid polyurethane system. The formation of a single multilayer composite structure is shown. We also present the results of the experimental research of strength of a laminated composite and its inner layer without facing layers when tested for static bending with concentrated load increasing at a constant rate and compression testing up to 10% of relative deformation. It describes the effect of the size of hexagonal prismatic cells of the frame on the physical and mechanical characteristics of the middle layer. The reduction of the cell size results in the increase of the composite strength. The dependence of the composite density on the size of the cells of the basalt frame has been studied.

Development of Cement Compositions with a Finely Dispersed Additive for Consolidation of Soil by the Injection

2019 ◽  
Vol 974 ◽  
pp. 149-155
Author(s):  
Irina V. Kozlova ◽  
Alexey E. Bespalov ◽  
Alexandra V. Bespalova
Keyword(s):  
Compressive Strength ◽  
Portland Cement ◽  
Mechanical Characteristics ◽  
Cement Stone ◽  
Soil Consolidation ◽  
Injection Solution ◽  
Concentrated Load ◽  
Reduced Viscosity ◽  
Injection Technology ◽  
Physical And Mechanical Characteristics

Cement compositions prepared by mixing cement with a stabilized finely dispersed slag suspension, which allow improving the structural, physical and mechanical characteristics of the cement stone are considered. On the first day of hardening, the strength of modified specimens increased by 54%, at the grade age - by 43%, and the porosity decreased by 13.8 and 17.3%, respectively. The possibility of obtaining an injection solution for soil consolidation on the basis of Portland cement and a stabilized slag suspension with the concentration of a finely dispersed slag of 50 g/l is considered. Studies have shown that the injection solution under study has reduced viscosity and sedimentation, increased compressive strength. After 28 days of hardening, the strength was 14.2 MPa, which is higher than the recommended values ​​for consolidation of soil under the foundations (4-6 MPa), and at a concentrated load, for the base under the foundations of the columns (9-10 MPa). The data obtained allows considering an injection solution based on Portland cement and slag suspension for the use in the injection technology of soil consolidation.

The Influence of Electromagnatic Field Microwave on Physical and Mechanical Characteristics of CFRP (Carbon Fiber Reinforced Polymer) Structural

2016 ◽  
Vol 870 ◽  
pp. 101-106 ◽  
Author(s):  
I.V. Zlobina ◽  
N.V. Bekrenev
Keyword(s):  
Electromagnetic Field ◽  
Composite Materials ◽  
Carbon Fiber ◽  
Power Density ◽  
Mechanical Characteristics ◽  
Peak Load ◽  
Laminated Composite ◽  
Scientific Publications ◽  
Laminated Composite Materials ◽  
Physical And Mechanical Characteristics

Based on the analysis of the development trends of modern transport equipment the prospect of structural composite materials usage, for example CFRP structural, is shown. In this regard, the expediency of conducting research to improve the strength characteristics of these materials is established. It is shown that, despite the large amount of scientific publications on the application of electro-technological methods and microwave technologies for modification of composite materials, applied to heterogeneous materials, such as carbon fiber, in Russia and abroad there are still some unsolved theoretical and practical questions. The studies of the effect of microwave electromagnetic field power density on different physical and mechanical characteristics of laminated composite materials in order to establish the opportunities to improve their performance, in particular their strength, were made. The example of carbon is used to show that the microwave electromagnetic field power density of 17.5 W/cm3 at a frequency of 2450 MHz exposure time of 2 minutes causes an increase in the shear strength of 38 – 40 % and an increase in the duration of the construction operation of carbon under the action of the peak load of 1.5 up to 4.5 times, wherein the change in flexural strength and modulus of elasticity was 2.6 %.

BENCH DESIGN AND STUDY OF PHYSICAL AND MECHANICAL CHARACTERISTICS OF A TEAT CUP LINER WITH ANTIBACTERIAL FILLER

2020 ◽  
pp. 22-26
Author(s):  
YURY G. IVANOV ◽  
◽  
YELENA V. MASHOSHINA ◽  
LYUDMILA N. VERLIKOVA ◽  
DARIA G. GELETIY ◽  
...  
Keyword(s):  
Mechanical Characteristics ◽  
Physical And Mechanical Characteristics

Discharge-pulse Geotechnical Electro Discharge Technology of Bases Strengthening

2020 ◽  
Vol 787 (12) ◽  
pp. 63-65
Author(s):  
N.S. Sokolov
Keyword(s):  
Bearing Capacity ◽  
Mechanical Characteristics ◽  
Discharge Pulse ◽  
Zero Values ◽  
Traditional Technologies ◽  
Negative Friction ◽  
Geotechnical Problems ◽  
Physical And Mechanical Characteristics

The problem of increasing the bearing capacity of the base is an relevant problem in modern geotechnical construction. When significant loads are transmitted to the base, the use of traditional technologies is not always justified. Often there is an urgent need to use non-standard ways to strengthen the bases. In many cases, the geotechnical situation is aggravated by the presence of weak underlying layers with unstable physical and mechanical characteristics in engineering-geological sections. When strengthening such bases with the help of traditional piles, the latter can get negative friction, which significantly reduces their bearing capacity on the ground, sometimes reaching zero values. This may lead to additional precipitations of the objects being constructed and constructed in the zone of geotechnical influence. The use of ERT piles in most cases successfully solves many complex geotechnical problems.

Promising hybrid fabrics based on carbon and aramid fibers as a reinforcing filler for polymer composites

2019 ◽  
pp. 86-95 ◽  
Author(s):  
G. F. Zhelezina ◽  
V. G. Bova ◽  
S. I. Voinov ◽  
A. Ch. Kan
Keyword(s):  
Composite Material ◽  
Polymer Composites ◽  
Carbon Fibers ◽  
Mechanical Characteristics ◽  
High Strength ◽  
High Modulus ◽  
Hybrid Composite Material ◽  
Hybrid Fabric ◽  
Reinforcing Filler ◽  
Physical And Mechanical Characteristics

The paper considers possibilities of using a hybrid fabric made of high-modulus carbon yarn brand ZhGV and high-strength aramid yarns brand Rusar-NT for polymer composites reinforcement. The results of studies of the physical and mechanical characteristics of hybrid composite material and values of the implementation of the strength and elasticity carbon fibers and aramid module for composite material are presented. 

The Composite Reinforcement of LLC «SK»

2015 ◽  
Vol 752-753 ◽  
pp. 749-757
Author(s):  
Svetlana Kiski ◽  
Zhanna Teplova ◽  
Alexey Sokolov
Keyword(s):  
Construction Industry ◽  
Russian Federation ◽  
Mechanical Characteristics ◽  
Analysis And Synthesis ◽  
The Russian Federation ◽  
Under Construction ◽  
Available Information ◽  
Main Producer ◽  
Physical And Mechanical Characteristics ◽  
Composite Reinforcements

The review of the main physical and mechanical characteristics of steel and nonmetallic composite reinforcements is presented in the article. Also there are complex studying, analysis and synthesis of available information. Much attention is paid to recommendations for designing building constructions of different functions with nonmetallic composite reinforcements. Scopes of nonmetallic composite reinforcements in the construction industry in Russia and abroad are considered.Information about main producer and the official distributor of composite reinforcements is provided in the article. This company is the official distributor in the Northwest of the Russian Federation. Their production is successfully used on many objects under construction in Russia. Materials of the article are based on the real photographic materials provided by personal archive of the company.

Influence of Processing Temperature on the Failure Behavior of Fabricated Composites

2011 ◽  
Vol 335-336 ◽  
pp. 199-202
Author(s):  
Guo Ning Liu ◽  
Hua Dong Zhao ◽  
Qiang Zhu ◽  
Jing Ru Dong ◽  
Ming Hao Zhao
Keyword(s):  
Mechanical Characteristics ◽  
Pure Aluminum ◽  
Engineering Application ◽  
Middle Layer ◽  
Failure Behavior ◽  
Processing Temperature ◽  
Anticorrosion Property ◽  
Gas Concentration ◽  
Polyester Textile ◽  
Sandwiched Structure

Abstract: Composite materials are playing a greater role in engineering application due to their optimized structure and mechanical characteristics. Study here aims at composite design which enables the fabricated composite to have excellent mechanical behavior even in extremely corrosive environment, for example, environment with extremely high ozone gas concentration. To take advantage of the great anticorrosion property of pure aluminum (Al), PET thin film coated with pure aluminum (Al) on its surface has been introduced as the top layer of the fabricated composite with polyester textile as the middle layer. To bond these layers together, the composites with this sandwiched structure are manufactured at different temperature. Main purpose of the study is to evaluate the influence of processing temperatures on the mechanical properties of the manufactured composites, and on their failure behavior. In this way, optimized processing temperature may be found.

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