The composite skin coating structure of the front edge supersonic aircraft body is deformed, cracked and even stripped due to continuous impact raindrops. material used in this paper based on carbon fiber T300 braided material, its surface coated with three different types coatings.In order reveal rain erosion damage mechanism establish criterion, a multi-jet test device rotating arm are carry out tests materials, respectively, simulate droplet at same position real field impact. behavior...

Abstract The presence of minute particles suspended in the air poses a significant threat to aircraft and wind turbine, subjecting them solid particle impact wear. This exposure can culminate delamination failure protective structural coatings, impeding longevity efficacy these structures. To delve into intricate behavior erosion on skin unravel their underlying damage mechanisms, establish definitive criterion for assessing coating damage, we employed carbon fiber T300 as substrate, applied...

Abstract Deep subwavelength highly confined and long-range optical propagation is vital for photonics integration. However, the performance of guided mode could be improved by trade-off between light confinement loss. Here, we demonstrate a high-performance hybrid waveguide consisting high-index nanowire separated from linear array low-index dielectric gap. The significantly achieves plasmonic platform optimization based on combination few-layer graphene (FLG) hexagonal boron nitride (hBN)...

Carbon-carbon composite materials are characterized by high heat resistance and thermostability for which they, in most of their physical mechanical characteristics, can be attributed to the promising materials. Approximately 81% all carbon-carbon used manufacture brake rotors aircraft, 18% – space rocket technology, only 1% other areas application. While need composites technology is constantly decreasing volume production disc aircraft steadily growing, therefore research on properties...

Tests on bending are one of the effective ways to experimentally determine elasticity and shear moduli. An important task in implementation composite materials aerospace structures is development methods for determining physical mechanical characteristics materials. The paper presents tests three-point samples metal-polymer material "GLAss-REinforced" Fibre Metal Laminate (GLARE) presented. Examined samples, consisting 17 layers, which apparent interlayer strength results was established by...

The digital revolution in the Russian economy is leading to a radical change labour market, emergence of new competencies, improved cooperation, increased responsibility citizens, their ability make independent decisions. This, turn, reason for reorganisation educational process, largely based on use IT technologies. purpose paper solve problem unification programmes within framework digitalisation process universities. proposed, which ensures conducting without losing its quality, taking...

When an aircraft passes through a rainy area at high speed, the coating on front edge of fuselage will be continuously eroded by raindrops, causing to wear, crack or even peel off. This paper uses carbon fiber T300 material as base material, and different impact speeds numbers, water cutting equipment was used simulate erosion caused continuous droplets. The damage morphology samples stages observed digital microscope Scanning Electron Microscope (SEM), evolution curve established analyze...

In this work, samples of magnetite nanoparticles are synthesized using various synthetic methods. It is shown that the existing methods synthesis, most widespread method coprecipitation Fe2+ and Fe3+ salts. Less common, but interest due to slower more controlled kinetics particle nucleation, oxidation method. However, unstable under external influences its phase transition maghemite can occur, which leads a change in magnetic characteristics biological responses. After analyzing results...

Nowadays, additive technologies are used to create physical models, prototypes, samples, tooling, and the production of plastic, metal, ceramic, glass, composite components, components made biomaterials. The greatest technological interest is final parts from metal alloys. This paper presents results studies topography differently oriented surfaces PH1 stainless steel samples using method selective laser melting. were studied in plane construction, perpendicular platform, at angles 45o 135o....

In this work, the electrokinetic properties of Fe3O4 nanoparticles modified with various alkoxysilanes (tetraethoxysilane and 3-aminopropyltriethoxysilane) in media were investigated. The determined values zeta potential Fe3O4/SiO2 samples indicate complete coverage a tetraethoxysilane shell, as well case Fe3O4/aminopropyltriethoxysilane. data obtained on zeta-potentials ligands make it possible to predict efficiency subsequent functionalization by target molecules. A decisive role study...

In this study, two types of ligands were introduced onto the surface magnetite nanoparticles by hydrolysis and condensation organosilicon reagents: organosilane-tetraethoxysilane (TEOS) aminoorganosilane - aminopropyltriethoxysilane (APTES). It is shown that coatings based on SiO2 solve a double problem: first, they prevent aggregation oxidation magnetite; secondly, allow to be modified with various specific for biomedical applications due terminal groups. was shown, after modification TEOS...

In this work, we studied the properties of a specially synthesized organometallic coordination polymer - porous with biocompatible structural elements based on oxoclusters iron muconate (III). The samples were investigated by scanning electron microscopy, thermogravimetric analysis combined differential calorimetry, and study low-temperature nitrogen adsorption sample obtained modified solvothermal technique. It is shown that most pores have an average radius 18,8 Å ~ 1,88 nm. Also, as...

Carbon-carbon composite materials (CCCM) are a new class of structural designed to create light, durable, and space-based rigid structures for aerospace, hypersonic, gas turbine engines, parts nozzle blocks, rocket combustion chambers, transition trusses. They have the unique ability maintain high strength stiffness with 2500°C. For manufacture thermally stressed nozzles, carbon fiber fabrics used. Antioxidant coatings based on tantalum silicon applied nozzles adhesive (made carbide, which...

The article discusses a method for modeling traffic flow on highway and network of intersections using cellular automatas. A set parameters characterizing vehicle drivers is considered, as well taking into account the influence states turn signals braking neighboring vehicles when deciding maneuver. An algorithm proposed that describes procedure factors affecting possible rearrangement, or acceleration move along has separate entrances exits from it. Possible situations in which can go an...

В статье исследованы особенности акустического воздействия на авиационные агрегаты из полимерных композиционных материалов. Разработана методика выставки угла волны, которая выравнивает масштабные коэффициенты обоих измерительных каналов дифференциального агрегата материалов и компенсирует погрешность от перекрестного демпфирования. Получены аналитические выражения для масштабного коэффициента смещения нуля Показано, что этот масштабный коэффициент, в отличие режима дискретных шумовых...

Strong optical field intensity is greatly desired in mid-infrared (MIR) photonics to confine light on miniaturized compact-size chips. However, due a fundamental trade-off between energy confinement and propagation loss, it has been challenging task obtain further deep subwavelength confinement. In this study, we present simple graphene waveguide that generates image plasmons assisted by metallic cylindrical nanowires operating at wavelength of 15 µm. Due high-mobility encapsulated hexagonal...

To manipulate on-chip mid-IR signals, it is pivotal to construct a waveguide with subwavelength energy confinement. However, deep optical always suffers from high signal crosstalk, resulting in an inevitable coupling loss of multi-channel communication. solve this problem, paper, hybrid which composed graphene/hexagonal boron nitride (hBN) structure and dielectric waveguide, designed realize strongly enhanced light-matter interaction, accompanied by low crosstalk transmission. The...

The relevance of the problem stated in article is due to fact that order use modern methods for creating parts aerospace technology, it necessary recognize their capabilities and strive improve these methods. purpose analyze dialectics design documentation those contradictions are caused by digital technologies engineer’s language. paper discusses main prototypes designed engineering objects at development stages. Possible applications rapid prototyping shown. A number reasons have been...