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    Wyświetlanie 1-3 z 3
    Tytuł:
    Pure bending of strip (beam) with crack in strip of tensile stress with allowance for plastic strips near crack tips
    Autorzy:
    Sulym, Heorgij
    Opanasovych, Viktor
    Slobodian, Mykola
    Bilash, Oksana
    Powiązania:
    https://bibliotekanauki.pl/articles/387360.pdf
    Data publikacji:
    2020
    Wydawca:
    Politechnika Białostocka. Oficyna Wydawnicza Politechniki Białostockiej
    Tematy:
    pure bending
    strip
    beam
    crack
    plastic strip
    linear conjugation problems
    Opis:
    In the article, the pure bending problem for strip (beam) with straight, perpendicular to its axis crack located in the zone of tensile stresses is investigated on the assumption of narrow plastic strips near crack tips. Using methods of the theory of functions of a complex variable and complex potentials, the problem is reduced to the several linear conjunction problems. The solutions of latter problems are ob-tained in the class of functions confined in the edges of plastic strips. Formulas for the calculation of their lengths are derived. Expressions for the determination of crack tip opening values are written. Numerical analysis of the problem is performed.
    Źródło:
    Acta Mechanica et Automatica; 2020, 14, 1; 44-49
    1898-4088
    2300-5319
    Pojawia się w:
    Acta Mechanica et Automatica
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Stress concentration at load-carrying fillet welded cruciform joints subjected to tensile and bending loads
    Autorzy:
    Molski, Krzysztof L.
    Powiązania:
    https://bibliotekanauki.pl/articles/387288.pdf
    Data publikacji:
    2019
    Wydawca:
    Politechnika Białostocka. Oficyna Wydawnicza Politechniki Białostockiej
    Tematy:
    cruciform welded joint
    load-carrying fillets
    stress concentration factor
    stress intensity factor
    finite element method
    Opis:
    This article presents numerical finite element method (FEM) analysis of the stress concentration at toes and crack-like faults in load-carrying fillet welded cruciform joints with transversal slits resulting from non-fused root faces. Potential fatigue damage of such joints subjected to cyclic tensile and bending loads appears in the form of fatigue cracks starting from the weld roots or toes. The aim of this article is to find qualitative and quantitative relationships between geometrical parameters of the load-carrying fillet welded cruciform joint subjected to tensile and bending loads and the stress concentration at weld toes and roots. The results of the analysis represented by the stress concentration factors (SCFs) and the stress intensity factors KI and KII are shown in the form of tables, graphs and mathematical formulas, which may be applied for fatigue assessment of such joints.
    Źródło:
    Acta Mechanica et Automatica; 2019, 13, 4; 245-250
    1898-4088
    2300-5319
    Pojawia się w:
    Acta Mechanica et Automatica
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Experimental and numerical small punch tests of the 14cr ods ferritic steel
    Autorzy:
    Nowik, Krzysztof
    Oksiuta, Zbigniew
    Powiązania:
    https://bibliotekanauki.pl/articles/2105990.pdf
    Data publikacji:
    2022
    Wydawca:
    Politechnika Białostocka. Oficyna Wydawnicza Politechniki Białostockiej
    Tematy:
    ODS ferritic steel
    mechanical alloying
    small punch testing
    finite element method
    FEM
    yield stress
    ultimate tensile strength
    Opis:
    Nowadays, various small specimen test techniques have gained wide popularity and appreciation among researchers as they offer undoubtful benefits in terms of structural material characterisation. This paper focuses on small punch tests (SPTs) performed on small-sized disc specimens to assess the mechanical properties of 14Cr oxide dispersion strengthened (ODS) steel. A numerical model was established to support experimental data and gain deeper insight into complex strain states developing in a deformed specimen. Modern evaluation procedures were discussed for obtaining mechanical properties from the small punch force-deflection response and were compared with the literature. Applicability and universality of those relations at different test conditions were also studied. It appeared that different ball diameters used had negligible influence on yield point but strongly affected ultimate strength estimation. It was found that friction belongs to decisive factors determining strain distribution in samples, as dry conditions increase the peak strain and move its location farther from the punch pole.
    Źródło:
    Acta Mechanica et Automatica; 2022, 16, 3; 225--232
    1898-4088
    2300-5319
    Pojawia się w:
    Acta Mechanica et Automatica
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-3 z 3

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