scholarly journals Substantination of carbon fiber as an innovative materials for fistening of mining workings of coal mines

2021 ◽  
Vol 64 ◽  
pp. 112-121
Author(s):  
I Sheka ◽  
Ye Tsivka
Keyword(s):  
Mechanical Properties ◽  
Composite Material ◽  
Comparative Analysis ◽  
Composite Materials ◽  
Carbon Fiber ◽  
Coal Mines ◽  
Physical And Mechanical Properties ◽  
Metallic Materials ◽  
Advantages And Disadvantages ◽  
Mine Workings

Purpose. To analyze composite materials and prospects of their use as fastening materials for mining of coal mines.Perform a comparative analysis of the physical and mechanical properties of the innovative material carbon fiber and metallic materials, as well as compare their features. To determine the possibility of using carbon fiber as a fastening material for mining of coal mines. Research methodology. The generalization of physical and mechanical properties of carbon fiber on the basis of its analysis is performed. The features of mechanical properties of carbon fiber, steel and aluminum are compared, which showed that this composite material has the best physical and mechanical properties and it is expedient to use it in the fastening elements of mine workings. Research results. The areas of use of composite materials in industry are analyzed and generalized, and it is concluded that it is better to use carbon fiber as a fastening material for coal mine workings. A comparative analysis of the physical and mechanical properties of carbon fiber and steel is performed, which shows that this composite material has identical (and sometimes even better) properties as metallic materials. The advantages and disadvantages of carbon fiber as a fastening material for mining of coal mines are estimated. It is specified that the restraining factor, today, is the cost of carbon fiber, and later their price will decrease and demand will increase. It is concluded that when using this composite material in the fasteners of mine workings, it is possible to increase the pace of their implementation, reduce the complexity of the work performed and improve working conditions while facilitating the design. Scientific novelty. It is established that carbon fiber as a composite material can be used in the fastening elements of the preparatory workings of coal mines. Practical value. According to the results of the analysis, it is established that carbon plastics can be used in the fastening elements of mine workings, which will promote the development of underground coal mining.

scholarly journals POLYMER CONCRETE MIXTURES – APPLICATION IN ENGINEERING INDUSTRY

STED JOURNAL ◽  
2019 ◽  
Vol 1 (2) ◽  
Author(s):  
Robert Poklemba ◽  
Jozef Zajac ◽  
Darina Duplakova ◽  
Peter Cizmar ◽  
David Goldyniak
Keyword(s):  
Mechanical Properties ◽  
Composite Material ◽  
Composite Materials ◽  
Material Properties ◽  
Physical And Mechanical Properties ◽  
Strength Properties ◽  
Engineering Industry ◽  
Polymer Concrete ◽  
Advantages And Disadvantages ◽  
Concrete Mixtures

This article discusses the properties of concrete composite materials based on their contexture. Systematic and interactive approaches are required in order to achieve optimal material properties in the preparation of composite materials. In order to predict the physical and mechanical properties of each component of the composite material but also as a whole, its optimization, not only the mechanical but also the material properties under different working conditions, requires a combination of different methods and technologies. The advantage of each composite is its specific properties that cannot be achieved by any component of the composite material alone. The strength of the materials based on polymer concrete mixtures can be compared to the strength properties of metals. On the other hand, this material has elastic properties which give the material a high degree of flexibility. When compared to conventional materials, the value of polymer composites is assessed not only in terms of excellent mechanical properties but also in terms of their low weight and cost. The aim of the paper is to describe the advantages and disadvantages of composites based on polymer concrete mixtures.

Comparative Analysis of the Physical and Mechanical Properties of Composites with Functional Fillers Based on Waste

2021 ◽  
Vol 410 ◽  
pp. 668-673
Author(s):  
Vyacheslav V. Barakhtenko ◽  
Tatiana H. Sahabutdinova ◽  
Yury V. Novikov
Keyword(s):  
Mechanical Properties ◽  
Comparative Analysis ◽  
Industrial Waste ◽  
Construction Materials ◽  
Physical And Mechanical Properties ◽  
Point Of View ◽  
Metallic Materials ◽  
Materials Used ◽  
Functional Fillers ◽  
Properties Of Composites

The article is devoted to research in the development of composite materials based on polyvinyl chloride and industrial waste from the metallurgical, energy and mining industries. The properties of dispersed waste have been studied, which make it possible to speak of the possibility of their use as fillers for polymer compositions. A comparative analysis of the tested physical and mechanical properties is carried out, depending on the characteristics of the particle size of the fillers. It was revealed that from the point of view of construction materials, all the wastes under study can be used as fillers. The development will make it possible to dispose of industrial waste to obtain useful products and save natural non-metallic materials used in the creation of composites.

METHODS OF TESTING RING SAMPLES MADE OF PLASTIC COMPOSITE MATERIALS USED IN THE AVIATION INDUSTRY AND THE ESTIMATED EVALUATION OF THEIR EFFECTIVENESS

2019 ◽  
Vol 6 (4) ◽  
pp. 68-71
Author(s):  
Mikhail Mikhailovich Polovin ◽  
Egor Vadimovich Nazarov ◽  
Evgeniy Vasilyevich Zhuravlev ◽  
Denis Sergeevich Shavelkin
Keyword(s):  
Mechanical Properties ◽  
Comparative Analysis ◽  
Composite Materials ◽  
Aviation Industry ◽  
Advantages And Disadvantages ◽  
Plastic Composite ◽  
Materials Used ◽  
Definition Of ◽  
The Given

In relation to the increase in the proportion of composite materials used in the design of modern aircraft, the most acute issue is the issue of confirming the characteristics of materials during their testing. In this paper, the methods of testing composite materials used in the elements of the glider design are analyzed, and the estimated assessment of the methods analyzed is made.Within the limits of the given work the comparative analysis of existing and perspective methods of carrying out of tests of ring samples from composite materials for the purpose of an estimation of their efficiency regarding definition of mechanical properties is carried out. The advantages and disadvantages of each method are determined.

scholarly journals MULTIAXIAL CARBON FABRICS IN THE PRODUCTS OF AVIATION TECHNOLOGY (review)

2021 ◽  
pp. 105-116
Author(s):  
A.I. Sidorina ◽  
Keyword(s):  
Composite Material ◽  
Composite Materials ◽  
Carbon Fiber ◽  
Polymer Matrix ◽  
Processing Technologies ◽  
Advantages And Disadvantages ◽  
Reinforcing Fillers ◽  
Aviation Technology ◽  
Technology Review ◽  
Carbon Fabrics

The article considers the main advantages and disadvantages of application of multiaxial fabrics as reinforcing fillers for composite materials with a polymer matrix, and specifies the most common processing technologies of multiaxial fabrics into a composite material. The paper provides the information about the use of carbon multiaxial fabrics in the manufacture of structures for aircraft products by the example of the production of the Airbus A380 rear bulkhead and of the Airbus A400M upper cargo door. Brief characteristics of the world’s leading manufacturers of carbon fiber multiaxial fabrics for aircraft products are given.

Properties of Hemp Fibres Reinforced PLA Composites

2019 ◽  
Vol 800 ◽  
pp. 205-209 ◽  
Author(s):  
Anete Smoca ◽  
Silvija Kukle ◽  
Zane Zelсa
Keyword(s):  
Mechanical Properties ◽  
Tensile Strength ◽  
Composite Material ◽  
Elastic Modulus ◽  
Comparative Analysis ◽  
Composite Materials ◽  
Fixed Temperature ◽  
Hemp Fibers ◽  
Relative Extension ◽  
Hemp Fibres

In this study 3 samples of bio-composite materials with different proportion of hemp fibers in the PLA matrix were developed, their comparative analysis and certain mechanical properties were investigated. Bio-composite hemp and polylactide (PLA) fibers were evenly blended using carding technology. The obtained blanks were treated for thermosetting at a fixed temperature of 180°C and a pressure of 100 kN, as well as controlled heating, compression and cooling time were applied. The mechanical properties (tensile strength σt, elastic modulus Et, relative extension ɛt) of composite material were determined.

scholarly journals Effect of complex flame retardant on physico-chemical properties of orthophthalic unsaturated resin

2020 ◽  
pp. 26-29
Author(s):  
Y. M. Yevtushenko ◽  
Y. A. Grigoriev ◽  
I. O. Kuchkina ◽  
E. V. Afoshina ◽  
G. A. Krushevsky
Keyword(s):  
Mechanical Properties ◽  
Composite Material ◽  
Composite Materials ◽  
Flame Retardant ◽  
Unsaturated Polyester ◽  
Chemical Properties ◽  
Physical And Mechanical Properties ◽  
Polyester Resins ◽  
Physico Chemical ◽  
Kinetics Of

A brief review of the results of studies on reducing the combustibility of composite materials based on unsaturated polyester resins is presented. A flame retardant orthophthalic unsaturated resin based on a complex flame retardant was developed and studied. It is shown that the category for resistance to burning of the resin is achieved with 15–20% filling of the complex flame retardant based on ammonium polyphosphate, melamine and pentaerythritol. The kinetics of curing and physical and mechanical properties of the composite material are evaluated.

Improving the Composite Materials for Bi Lateral Prosthesis with Below Knee Amputation

2020 ◽  
Vol 1002 ◽  
pp. 379-388
Author(s):  
Saif M. Abbas ◽  
Ghanim Sh. Sadiq ◽  
Muhammed Abdul Sattar
Keyword(s):  
Mechanical Properties ◽  
Composite Material ◽  
Composite Materials ◽  
Carbon Fiber ◽  
Safety Factor ◽  
Internal Wall ◽  
Knee Amputation ◽  
Prosthetic Socket ◽  
Is Failure ◽  
Ansys Workbench

This study used the tensile and fatigue test to find the properties of composite material used to fabricate a prosthetic socket with below knee amputation using an excluding air technique. The composite materials consisted of eight layers of carbon-fiber for first socket and eight layers of perlon for second socket of below knee amputation. This study was conducted on a patient have 45years old of height 164cm and weight95kg were measured, and the results showed that the ultimate stress (Ϭult) and yield stress (Ϭy) for eight layers of perlon was39 MPa and 36 MPa, while for eight layers of carbon-fiber was 135 MPa and 121 MPa. The fatigue limit for eight layers of perlon was 15 MPa and for eight layers of carbon-fiber was 90 MPa. The value of pressure on the internal wall of the prosthetic socket was measured by F-socket sensor between stump and socket for four position; this data is anterior =210kPa, lateral=313kPa, posterior=225kPa and medial=180kPa. From mechanical properties and ANSYS workbench 14.5software, the safety factor for below knee socket with eight layers of carbon-fiber is (1.35) which is acceptable for socket design. The safety factor for below knee socket with eight layers of perlon is (0.22) which is failure.

scholarly journals Physical and Mechanical Properties of Natural Leaf Fiber-Reinforced Epoxy Polyester Composites

Polymers ◽  
2021 ◽  
Vol 13 (9) ◽  
pp. 1369
Author(s):  
Sanjeev Kumar ◽  
Lalta Prasad ◽  
Vinay Kumar Patel ◽  
Virendra Kumar ◽  
Anil Kumar ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Composite Materials ◽  
Synthetic Fibre ◽  
Low Cost ◽  
Fibre Length ◽  
Physical And Mechanical Properties ◽  
Natural Fibres ◽  
Risk Environment ◽  
Insulation Property ◽  
Natural Leaf

In recent times, demand for light weight and high strength materials fabricated from natural fibres has increased tremendously. The use of natural fibres has rapidly increased due to their high availability, low density, and renewable capability over synthetic fibre. Natural leaf fibres are easy to extract from the plant (retting process is easy), which offers high stiffness, less energy consumption, less health risk, environment friendly, and better insulation property than the synthetic fibre-based composite. Natural leaf fibre composites have low machining wear with low cost and excellent performance in engineering applications, and hence established as superior reinforcing materials compared to other plant fibres. In this review, the physical and mechanical properties of different natural leaf fibre-based composites are addressed. The influences of fibre loading and fibre length on mechanical properties are discussed for different matrices-based composite materials. The surface modifications of natural fibre also play a crucial role in improving physical and mechanical properties regarding composite materials due to improved fibre/matrix adhesion. Additionally, the present review also deals with the effect of silane-treated leaf fibre-reinforced thermoset composite, which play an important role in enhancing the mechanical and physical properties of the composites.

scholarly journals Acoustic Emission and K-S Metric Entropy as Methods for Determining Mechanical Properties of Composite Materials

Sensors ◽  
2020 ◽  
Vol 21 (1) ◽  
pp. 145
Author(s):  
Lesław Kyzioł ◽  
Katarzyna Panasiuk ◽  
Grzegorz Hajdukiewicz ◽  
Krzysztof Dudzik
Keyword(s):  
Mechanical Properties ◽  
Acoustic Emission ◽  
Composite Material ◽  
Composite Materials ◽  
Testing Machine ◽  
Measurement Data ◽  
Entropy Method ◽  
Displacement Sensor ◽  
Metric Entropy ◽  
Plastic Phase

Due to the unique properties of polymer composites, these materials are used in many industries, including shipbuilding (hulls of boats, yachts, motorboats, cutters, ship and cooling doors, pontoons and floats, torpedo tubes and missiles, protective shields, antenna masts, radar shields, and antennas, etc.). Modern measurement methods and tools allow to determine the properties of the composite material, already during its design. The article presents the use of the method of acoustic emission and Kolmogorov-Sinai (K-S) metric entropy to determine the mechanical properties of composites. The tested materials were polyester-glass laminate without additives and with a 10% content of polyester-glass waste. The changes taking place in the composite material during loading were visualized using a piezoelectric sensor used in the acoustic emission method. Thanks to the analysis of the RMS parameter (root mean square of the acoustic emission signal), it is possible to determine the range of stresses at which significant changes occur in the material in terms of its use as a construction material. In the K-S entropy method, an important measuring tool is the extensometer, namely the displacement sensor built into it. The results obtained during the static tensile test with the use of an extensometer allow them to be used to calculate the K-S metric entropy. Many materials, including composite materials, do not have a yield point. In principle, there are no methods for determining the transition of a material from elastic to plastic phase. The authors showed that, with the use of a modern testing machine and very high-quality instrumentation to record measurement data using the Kolmogorov-Sinai (K-S) metric entropy method and the acoustic emission (AE) method, it is possible to determine the material transition from elastic to plastic phase. Determining the yield strength of composite materials is extremely important information when designing a structure.

scholarly journals Effect of Structural Differences on the Mechanical Properties of 3D Integrated Woven Spacer Sandwich Composites

Materials ◽  
2021 ◽  
Vol 14 (15) ◽  
pp. 4284
Author(s):  
Lvtao Zhu ◽  
Mahfuz Bin Rahman ◽  
Zhenxing Wang
Keyword(s):  
Mechanical Properties ◽  
Composite Materials ◽  
Three Dimensional ◽  
Sheet Thickness ◽  
Physical And Mechanical Properties ◽  
Sandwich Composites ◽  
Computed Tomography Images ◽  
And Performance ◽  
Industrial Textiles ◽  
Load Conditions

Three-dimensional integrated woven spacer sandwich composites have been widely used as industrial textiles for many applications due to their superior physical and mechanical properties. In this research, 3D integrated woven spacer sandwich composites of five different specifications were produced, and the mechanical properties and performance were investigated under different load conditions. XR-CT (X-ray computed tomography) images were employed to visualize the microstructural details and analyze the fracture morphologies of fractured specimens under different load conditions. In addition, the effects of warp and weft direction, face sheet thickness, and core pile height on the mechanical properties and performance of the composite materials were analyzed. This investigation can provide significant guidance to help determine the structure of composite materials and design new products according to the required mechanical properties.

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