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    Tytuł:
    Assessment of fatigue life of aluminized, coarse-grained MAR247 alloy supported by full-field ESPI measurements
    Autorzy:
    Kopec, Mateusz
    Kukla, Dominik
    Kowalewski, Zbigniew L.
    Powiązania:
    https://bibliotekanauki.pl/articles/2200834.pdf
    Data publikacji:
    2022
    Wydawca:
    Polskie Towarzystwo Mechaniki Teoretycznej i Stosowanej
    Tematy:
    fatigue development
    damage
    nickel alloys
    electronic speckle pattern interferometry
    Opis:
    In this paper, fatigue performance of an aluminide layer coated, coarse-grained MAR247 nickel superalloy was monitored by using the full-field Electronic Speckle Pattern Interferometry (ESPI) method in the range of stress amplitude from 350MPa to 650MPa. It was found, that the ESPI method enables precise monitoring of the fatigue behaviour of coated MAR247 specimens since the area of potential failure was accurately indicated within the initial stage of fatigue damage development.
    Źródło:
    Journal of Theoretical and Applied Mechanics; 2022, 60, 4; 619--623
    1429-2955
    Pojawia się w:
    Journal of Theoretical and Applied Mechanics
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Experimental identification of cracked rotor system parameters from the forward and backward whirl responses
    Autorzy:
    Shravankumar, C.
    Tiwari, Rajiv
    Powiązania:
    https://bibliotekanauki.pl/articles/140263.pdf
    Data publikacji:
    2019
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    development of fatigue crack
    crack flexibility
    directional (full) spectrum
    higher harmonics
    forward and backward whirl
    Opis:
    In the present work, an experimental investigation of a transverse fatigue crack has been carried out. A mathematical modelling of cracked rotor system along with the measured vibration is used to find crack parameters that not only detect the fault but also quantify it. Many experimental studies on cracks considered the crack as a slit or notch, which remains open. However, such flaws do not mimic a fatigue crack behavior, in which crack front opens and closes (i.e., breathes in a single revolution of the rotor). The fatigue crack in rotors commonly depicts 2× frequency component in the response, as well as higher frequency components, such as 3×, 4× and so on. In rotors, both forward and backward whirling take place due to asymmetry in rotor, and thus the fatigue crack gives the forward and backward whirl for all such harmonics. A rotor test rig was developed with a fatigue crack in it; rotor motions in two orthogonal directions were captured from the rig at discrete rotor angular speeds using proximity probes. The directional-spectrum processing technique has been utilized to the measured displacements to get its forward and backward whirl components. Subsequently, it is executed in a mathematical model-based estimation procedure to obtain the crack forces, residual unbalances, and remaining rotor system unknown variables. Estimation of crack forces during rotation of the shaft gives its characteristics, which can be used further to develop newer crack models.
    Źródło:
    Archive of Mechanical Engineering; 2019, LXVI, 3; 329-353
    0004-0738
    Pojawia się w:
    Archive of Mechanical Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Analysis of axle shaft fatigue failure and anti-fatigue system design
    Autorzy:
    İrsel, G.
    Powiązania:
    https://bibliotekanauki.pl/articles/102537.pdf
    Data publikacji:
    2017
    Wydawca:
    Stowarzyszenie Inżynierów i Techników Mechaników Polskich
    Tematy:
    CATIA
    ANSYS
    fatigue analysis
    redesign
    shaft fatigue
    product development
    Opis:
    In this study, an axle shaft subjected to static deformation and fatigue damage was considered by using computer-aided engineering. This shaft system was modeled with CATIA and subjected to dynamic fatigue analyses with Ansys workbench. The damaged fracture surfaces of the shaft have been examined. Thus, the fatigue and damage was revealed in greater detail. For the present system, a design with a minimum cost, short production process, minimum weight was sought together with methodical construction principles. By means of CATIA and ANSYS, the product development design with reasonable tension and deformation values was formed for endless life fatigue. A design was produced in a short space of time with the help of 2D CATIA drawings and field tests were carried out. The design was used through 560.000 cycles and damage was not observed.
    Źródło:
    Advances in Science and Technology. Research Journal; 2017, 11, 3; 150-163
    2299-8624
    Pojawia się w:
    Advances in Science and Technology. Research Journal
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-3 z 3

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