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    Wyświetlanie 1-3 z 3
    Tytuł:
    Gas hydrates impact on corrosion of the well flow lines material
    Autorzy:
    Poberezhny, L.
    Hrytsanchyk, A.
    Mandryk, O.
    Poberezhna, L.
    Popovych, P.
    Shevchuk, O.
    Mishchuk, B.
    Rudyak, Yu.
    Powiązania:
    https://bibliotekanauki.pl/articles/2175767.pdf
    Data publikacji:
    2021
    Wydawca:
    Stowarzyszenie Komputerowej Nauki o Materiałach i Inżynierii Powierzchni w Gliwicach
    Tematy:
    gas hydrate
    oil and gas region
    corrosion-mechanical tests
    influence of hydrate formation
    inner pipe corrosion
    hydraty gazowe
    region ropy i gazu
    badania korozyjno-mechaniczne
    wpływ tworzenia się hydratów
    korozja rur wewnętrznych
    Opis:
    Purpose: Determination of regularities of joint action of mechanical stresses, formation water and hydrate formation on corrosion of material of flow pipelines. Design/methodology/approach: According to the analysis of reservoir water of the investigated deposits, it was found that the main corrosive component is soluble chlorides. Proposed for corrosion and corrosion-mechanical tests of 6 model environments. An estimation of the influence of stress concentration, depending on the defects of the inner wall of the pipe, was carried out, and the nominal local stresses in the pipeline was carried. Findings: The basic regularities of influence of stress and hydration formation on corrosion and localization of corrosion processes and on the kinetics of deformation of samples are described. For samples made of steel 20 and 17GS, an increase in the velocity of general and local corrosion for samples sustained in the gas hydrate was observed compared to the control results obtained, the coefficient of influence of the gas hydrate on corrosion was calculated. Research limitations/implications: The obtained results are valid for thermobaric operating conditions of well flow lines. Practical implications: The data obtained in the work on the patterns of corrosion processes and the impact of hydrate formation on them will allow to identify potentially dangerous areas of flow lines and prevent emergencies. Originality/value: Based on the analysis of the geometric dimensions of the defects, the effective stress concentration coefficients are calculated, and it is shown that the stresses in the vicinity of corrosion defects in normal operating modes range from 164 to 545 MPa.
    Źródło:
    Archives of Materials Science and Engineering; 2021, 110, 1; 5--17
    1897-2764
    Pojawia się w:
    Archives of Materials Science and Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Simulation of thermomechanical processes in disc brakes of wheeled vehicles
    Autorzy:
    Hrevtsev, O.
    Selivanova, N.
    Popovych, P.
    Poberezhny, L.
    Sakhno, V.
    Shevchuk, O.
    Poberezhna, L.
    Murovanyi, I.
    Hrytsanchuk, A.
    Romanyshyn, O.
    Powiązania:
    https://bibliotekanauki.pl/articles/1818803.pdf
    Data publikacji:
    2021
    Wydawca:
    Stowarzyszenie Komputerowej Nauki o Materiałach i Inżynierii Powierzchni w Gliwicach
    Tematy:
    disc brake
    wheeled vehicle
    angular velocity
    thermodynamically reversible process
    centrifugal force
    time of relaxation
    isotropic elastic medium
    torsional moment
    hamulec tarczowy
    pojazd kołowy
    prędkość kątowa
    siła odśrodkowa
    izotropowy ośrodek sprężysty
    moment skręcający
    Opis:
    Purpose: Ensuring the required operational reliability of disc brakes by forecasting their technical condition taking into account thermomechanical processes. Design/methodology/approach: Differential equations of rotation of a rigid body around a fixed axis are solved, it is established that the equations of motion and the equations of thermal conductivity are indirectly related. The use of these analytical dependences provides a better understanding of thermomechanical transients. Findings: The solution is obtained on the basis of the differential equation of thermal conductivity of the hyperbolic type, which does not allow an infinite velocity of propagation of temperature perturbations in contrast to the differential equation of thermal conductivity of the parabolic Fourier type. The obtained analytical dependences provide a better understanding of thermomechanical transients and develop a theoretical basis for determining stresses and heat fluxes in solving problems of reliability and durability of disc brakes. Research limitations/implications: The work uses generally accepted assumptions and limitations for thermomechanical calculations. Practical implications: It is shown, that transients in a mechanical system - a brake disk at impulse loadings cause emergence of thermal effects which arise under the influence of external loadings. Originality/value: The application of these analytical dependences provides a better understanding of thermomechanical transients and develops a theoretical basis for solving problems of reliability and durability of disc brakes.
    Źródło:
    Journal of Achievements in Materials and Manufacturing Engineering; 2021, 104, 1; 11--20
    1734-8412
    Pojawia się w:
    Journal of Achievements in Materials and Manufacturing Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Evaluation of stress-strain state of vehicles’ metal structures elements
    Autorzy:
    Hrevtsev, O.
    Selivanova, N.
    Popovych, P.
    Poberezhny, L.
    Rudyak, Yu.
    Shevchuk, O.
    Poberezhna, L.
    Ivanova, A.
    Skyba, O.
    Shashkevych, O.
    Hrytsanchuk, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/2201126.pdf
    Data publikacji:
    2022
    Wydawca:
    Stowarzyszenie Komputerowej Nauki o Materiałach i Inżynierii Powierzchni w Gliwicach
    Tematy:
    thermomechanical stress
    disk brakes durability
    stress and strain state
    vehicle reliability
    braking distance
    naprężenia termomechaniczne
    trwałość hamulców tarczowych
    stan naprężenia i odkształcenia
    niezawodność pojazdu
    droga hamowania
    Opis:
    Purpose: Develop a method for determining and evaluating the stress-strain state, in particular the distribution of thermomechanical stresses in the materials of individual rotating parts of vehicles. Design/methodology/approach: The proposed method is based on the principle of gradual approximations of the solution when the boundary conditions are satisfied on the curvilinear limiting surfaces of the disk body. Findings: The proposed method of determining and estimating the distribution of thermomechanical stresses in the disk material makes it possible to take into account the variable geometry: thickness and presence of a hole in the central part of the disk, also correctly determine stress strain state at any point of unevenly heated rotating axial body. Research limitations/implications: The work uses generally accepted assumptions and limitations for thermomechanical calculations. Originality/value: It is proved that in real disks the stress-strain state is spatial, and the well-known method based on the hypotheses of the plane-stress state does not provide the possibility of calculating the values of stresses in the thickness of the disk. The obtained results can be used as a basis for improving the methodology of auto technical examination of road accidents. In addition, they can be taken into account by design engineers of car brake systems.
    Źródło:
    Archives of Materials Science and Engineering; 2022, 113, 2; 77--85
    1897-2764
    Pojawia się w:
    Archives of Materials Science and Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-3 z 3

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