PERSPECTIVE POLYMERIC COMPOSITE NANOMATERIAL FOR FIXING OF DETAILS OF BEARING KNOT IN AUTOTRACTOR TECHNICS TRANSMISSION

2016 ◽  
Vol 3 (1) ◽  
pp. 515-519
Author(s):  
Рожнов ◽  
A. Rozhnov ◽  
Ли ◽  
R. Li
Keyword(s):  
Experimental Studies ◽  
Polymeric Composite ◽  
Strength Properties ◽  
Polymerization Process ◽  
Polymeric Composition ◽  
Composite Nanomaterial

This article describes the technique and results of the experimental studies deformation-strength properties of glutinous connections of polymeric nanocomposition on the basis of anaerobic sealant AN-111. Results of polymerization process researches of anaerobic sealant AN-111 and polymeric composition on its basis are presented.

Experimental Studies Of Multilayer Glass Structures On Compression, Compression With Bending And Simple Bending

2019 ◽  
pp. 22-30
Keyword(s):  
Cross Section ◽  
Cross Sections ◽  
Applied Load ◽  
Experimental Studies ◽  
Strength Properties ◽  
Research Topic ◽  
Normative Values ◽  
Laminated Glass ◽  
The Cross ◽  
Experimental Values

The work of multilayer glass structures for central and eccentric compression and bending are considered. The substantiation of the chosen research topic is made. The description and features of laminated glass for the structures investigated, their characteristics are presented. The analysis of the results obtained when testing for compression, compression with bending, simple bending of models of columns, beams, samples of laminated glass was made. Overview of the types and nature of destruction of the models are presented, diagrams of material operation are constructed, average values of the resistance of the cross-sections of samples are obtained, the table of destructive loads is generated. The need for development of a set of rules and guidelines for the design of glass structures, including laminated glass, for bearing elements, as well as standards for testing, rules for assessing the strength, stiffness, crack resistance and methods for determining the strength of control samples is emphasized. It is established that the strength properties of glass depend on the type of applied load and vary widely, and significantly lower than the corresponding normative values of the strength of heat-strengthened glass. The effect of the connecting polymeric material and manufacturing technology of laminated glass on the strength of the structure is also shown. The experimental values of the elastic modulus are different in different directions of the cross section and in the direction perpendicular to the glass layers are two times less than along the glass layers.

scholarly journals RESEARCH OF PHYSICAL AND MECHANICAL PROPERTIES OF WOOD-FIBER MATERIALS

2020 ◽  
pp. 451-457
Author(s):  
Aleksandr Yur'yevich Vititnev ◽  
Yuriy Davydovich Alashkevich ◽  
Natal'ya Geral'dovna Chistova ◽  
Roman Aleksandrovich Marchenko ◽  
Venera Nurullovna Matygullina
Keyword(s):  
Mechanical Properties ◽  
Wood Fiber ◽  
Experimental Studies ◽  
Physical And Mechanical Properties ◽  
Production Method ◽  
Strength Properties ◽  
Grinding Process ◽  
Technological Parameters ◽  
Fiber Materials ◽  
Traditional Construction

This paper presents the results of experimental studies of the physical and mechanical properties of wood-fiber boards of the wet production method when regulating the design and technological parameters of the grinding process. This allowed us to determine the influence of the working clearance between the grinding discs and the concentration of fibre mass with the subject to of quality change wood fiber after defibrator using the developed construction of the disc fibrillation action on the physico-mechanical properties of boards. As a result of the experiment, regression models were obtained that adequately describe the studied grinding process and allow predicting the values of physical and mechanical properties of the finished product depending on the established  parameters process. A comparative analysis of the size and quality characteristics of the fiber semi-finished product and its fractional composition when using a developed construction the disc of refiner fibrillation action and a traditional design used in industry is carried out. The preferential efficiency of the grinding process under the fibrillating effect the disc of refiner in comparison with the traditional construction disc of refiner is established. As a result, there is a significant improvement in the quality indicators of the fiber semi-finished product and its composition due to the formation and predominance in the total mass of long and thin, respectively, flexible fibrillated fibers with high tile-forming properties, which allows to increase the strength properties of the product (by 20–25%), without using binding resins.

scholarly journals Experimental study of the antibacterial activity of the lytic Staphylococcus aureus bacteriophage ph20 and lytic Pseudomonas aeruginosa bacteriophage ph57 during modelling of its impregnation into poly(methylmetacrylate) orthopedic implants (bone cement)

2018 ◽  
Vol 73 (1) ◽  
pp. 59-68 ◽  
Author(s):  
A. G. Samokhin ◽  
Ju. N. Kozlova ◽  
D. V. Korneev ◽  
O. S. Taranov ◽  
E. A. Fedorov ◽  
...  
Keyword(s):  
Antibacterial Activity ◽  
Bone Cement ◽  
Polymethyl Methacrylate ◽  
Bacterial Colonization ◽  
Experimental Studies ◽  
Orthopedic Implants ◽  
Polymerization Process ◽  
Polymerization Reaction ◽  
Chemical Components

Background: The problem of bacterial colonization of implants used in medical practice continues to be relevant regardless of the material of the implant. Particular attention deserves polymeric implants, which are prepared ex tempore from polymethyl methacrylate, for example - duting orthopedic surgical interventions (so-called "bone cement"). The protection of such implants by antibiotic impregnation is subjected to multiple criticisms, therefore, as an alternative to antibiotics, lytic bacteriophages with a number of unique advantages can be used - however, no experimental studies have been published on the possibility of impregnating bacteriophages into polymethyl methacrylate and their antibacterial activity assessment under such conditions.Aims: to evaluate the possibility of physical placement of bacteriophages in polymethylmethacrylate and to characterize the lytic antibacterial effect of two different strains of bacteriophages when impregnated into polymer carrier ex tempore during the polymerization process in in vitro model.Materials and methods:  First stage - Atomic force microscopy (AFM) of polymethyl methacrylate samples for medical purposes was used to determine the presence and size of caverns in polymethyl methacrylate after completion of its polymerization at various reaction  temperatures (+6…+25°C and +18…+50°C).The second stage was performed in vitro and included an impregnation of two different bacteriophage strains (phage ph20 active against S. aureus and ph57 active against Ps. aeruginosa) into polymethyl methacrylate during the polymerization process, followed by determination of their antibacterial activity.Results: ACM showed the possibility of bacteriophages placement in the cavities of polymethyl methacrylate - the median of the section and the depth of cavities on the outer surface of the polymer sample polymerized at +18…+50°C were 100.0 and 40.0 nm, respectively, and on the surface of the transverse cleavage of the sample - 120.0 and 100.0 nm, respectively, which statistically did not differ from the geometric dimensions of the caverns of the sample polymerized at a temperature of +6…+25°C.The study of antibacterial activity showed that the ph20 bacteriophage impregnated in polymethyl methacrylate at +6…+25°C lost its effective titer within the first six days after the start of the experiment, while the phage ph57 retained an effective titer for at least 13 days.Conclusion: the study confirmed the possibility of bacteriophages impregnation into medical grade polymethyl methacrylate, maintaining the effective titer of the bacteriophage during phage emission into the external environment, which opens the way for the possible application of this method of bacteriophage delivery in clinical practice. It is also assumed that certain bacteriophages are susceptible to aggressive influences from the chemical components of "bone cement" and / or polymerization reaction products, which requires strict selection of bacteriophage strains that could be suitable for this method of delivery.

Experimental Study of Mechanical Properties of Fiber of Deep-Sea Mooring Cables

2011 ◽  
Vol 130-134 ◽  
pp. 1712-1715
Author(s):  
Gai Li Zhou ◽  
Linan Li ◽  
Shui Jiao Li ◽  
Shi Bin Wang
Keyword(s):  
Mechanical Properties ◽  
Elastic Modulus ◽  
Deep Sea ◽  
Performance Test ◽  
Breaking Strength ◽  
Fiber Strength ◽  
Experimental Studies ◽  
Strength Properties ◽  
Mooring Lines ◽  
Strength Performance

In order to learn the mechanical properties of deep-sea mooring lines, experimental studies involved in strength properties have been carried out in this thesis. In the fiber strength performance test, the small force-large deformation experimental device has been designed and optimized. As the fiber diameter is very small (about 40μm), microscope is chosen to measure the diameter. The intensity curve of fiber is divided into three typical phases. The yield strength, breaking strength and elastic modulus in initial stage can be calculated and the elastic modulus is basically a constant. With the increasing of loading rate, the breaking force reduces and gradually tends to stabilize. It has got the formula, breaking strength ∝.

scholarly journals Design, Simulation and Optimization of an Additive Laser-Based Manufacturing Process for Gearbox Housing with Reduced Weight Made from AlSi10Mg Alloy

Metals ◽  
2021 ◽  
Vol 12 (1) ◽  
pp. 67
Author(s):  
Liubov Magerramova ◽  
Vladimir Isakov ◽  
Liana Shcherbinina ◽  
Suren Gukasyan ◽  
Mikhail Petrov ◽  
...  
Keyword(s):  
Experimental Studies ◽  
Strength Properties ◽  
Body Parts ◽  
The Finite Element Method ◽  
Technological Parameters ◽  
Simulation And Optimization ◽  
Precision Casting ◽  
Production Techniques ◽  
Material Forming ◽  
Physical And Mechanical Characteristics

The gas turbine engine's (GTE) development aims for the increasing the efficiency, strength, reliability and safety of its components. To create competitive engines, housing parts and components with high functionality and reduced weight are needed. Especially difficult in the design and production are the gearboxes for aviation GTE. Traditional technologies based on precision casting or material forming operations have significant limitations due to the complexity of fulfilling multiple different requirements. Nowadays, one of the progressive production techniques is additive manufacturing. The article presents the results of computational and experimental studies that substantiate the applicability of laser additive technology to reduce the mass of body parts by up to 15% while ensuring their strength properties. The physical and mechanical characteristics of aluminum alloys acceptable for the manufacturing of housing parts were analyzed. The necessary characteristics of the powder alloy of the Al-Si system and the technological parameters of the L-PBF of the modified housing of the gear reducer are established. Using the finite element method (FEM) the L-PBF process was numerically simulated and the technological modes for synthesis of the AlSi10Mg alloy powder were optimized. With the help of a serial 3D printer ProX320DMP, the prototype of a gear housing was manufactured.

scholarly journals Изгиб и растяжение судовых композитных элементов

2020 ◽  
Author(s):  
S.I. Koryagin ◽  
O.V. Sharkov ◽  
N.L. Velikanov
Keyword(s):  
Polymer Coating ◽  
Experimental Studies ◽  
Adhesive Layer ◽  
Polymer Coatings ◽  
Breaking Load ◽  
Strength Properties ◽  
Concentrated Force ◽  
Mechanical Destruction ◽  
Metal Structures ◽  
Reinforced Polymer

Полимерные покрытия давно и прочно завоевали свое место при изготовлении и ремонте судовых конструкций. Одной из причин, сдерживающих их более широкое применение, является отсутствие расчетных зависимостей, позволяющих рассчитать прочностные свойства композитных элементов. Для построения этих зависимостей необходимы дальнейшие экспериментальные исследования, их анализ и обобщение. В работе представлены результаты исследований прочностных свойств металлических конструкций судов с армированным полимерным покрытием при растяжении и изгибе. Экспериментально было установлено, что разрушение покрытия происходило при линейных деформациях основы на границе адгезионного слоя. При загрузке образца сосредоточенной силой определены усилия, при которых произойдет механическое разрушение композиционного образца по адгезионному слою. Построены зависимости разрушающей нагрузки от соотношения толщин основы и покрытия при растяжении и изгибе, проведено сравнение с экспериментальными результатами.Polymer coatings have long and firmly won their place in the manufacture and repair of ship structures. One of the reasons restraining their wider application is the lack of computational dependencies that allow to calculate the strength properties of composite elements. Further experimental studies, analysis and generalization are needed to construct these dependencies. The paper presents the results of studies of strength properties of metal structures of ships with reinforced polymer coating under tension and bending. It was found experimentally that the destruction of the coating occurred during linear deformations of the substrate at the boundary of the adhesive layer. When loading a sample with a concentrated force, the forces at which the mechanical destruction of the composite sample along the adhesive layer will occur are determined. The dependences of the breaking load on the ratio of the thickness of the substrate and the coating under tension and bending are constructed, a comparison with the experimental results is carried out.

Utilization of Galvanic Enterprises Sewage

2021 ◽  
Vol 1038 ◽  
pp. 282-289
Author(s):  
Ludmyla Chernyshova ◽  
Sergei Movchan ◽  
Stepan Epoyan
Keyword(s):  
Aluminum Oxide ◽  
Water Resistance ◽  
Experimental Studies ◽  
Strength Properties ◽  
Test Results ◽  
Specific Density ◽  
Phosphoric Acids

A method for obtaining refractories based on inorganic glue as a reaction product of sludge from electroplating shops with sulfuric and phosphoric acids, which was tested by the authors in laboratory and industrial conditions in the article, is presents. After drying at a certain temperature, the manufactured samples are tested for strength. Properties of refractories based on inorganic glue are characterized by increased water resistance due to treatment with a cement solution. Based on experimental studies, the authors are presents the results of testing samples for strength with dry and wet aluminum-oxide abrasive. According to the test results, it was found that the specific density of the obtained samples increased from 0,57 to 0,9 g/cm3 with increasing glue content, while the strength decreased. Compositions with a low glue content had for the most strength.

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