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Wyszukujesz frazę "void" wg kryterium: Temat

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    Wyświetlanie 1-5 z 5
    Tytuł:
    Analysis of Stress and Strain Fields in and around Inclusions of Various Shapes in a Cylindrical Specimen Loaded in Tension
    Autorzy:
    Neimitz, A.
    Janus, U.
    Powiązania:
    https://bibliotekanauki.pl/articles/354166.pdf
    Data publikacji:
    2016
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    void nucleation
    inclusion fracture
    critical
    Opis:
    A numerical analysis is performed of the stress field in and around inclusions of various shapes. Inclusions both stiffer and more compliant than the metal matrix are analysed. The critical stresses required for inclusion fracture are estimated after observation of cavities and inclusions by scanning electron microscopy. Real inclusions were observed after performing uniaxial loading to different amounts of overall strain. The material tested was Hardox-400 steel.
    Źródło:
    Archives of Metallurgy and Materials; 2016, 61, 2A; 569-576
    1733-3490
    Pojawia się w:
    Archives of Metallurgy and Materials
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Voids Nucleation at Inclusions of Various Shapes in Front of the Crack in Plane Strain
    Autorzy:
    Neimitz, A.
    Janus, U.
    Powiązania:
    https://bibliotekanauki.pl/articles/958206.pdf
    Data publikacji:
    2016
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    void nucleation
    inclusion fracture
    critical stress
    Opis:
    An analysis is presented of the stress field in and around inclusions of various shapes. Results were obtained by the finite element method. Inclusions were located within elementary cells located at the centre of the specimen next to the crack front. The influence of an in-plane constraint on the stress distribution was tested.
    Źródło:
    Archives of Metallurgy and Materials; 2016, 61, 3; 1587-1592
    1733-3490
    Pojawia się w:
    Archives of Metallurgy and Materials
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Forming Limit Diagram, Void Analysis, Strain Distribution and Surface Roughness for SS430 Sheets During Multipoint Incremental Forming
    Autorzy:
    Ramkumar, K.
    Paulraj, G.
    Elangovan, K.
    Sathiya Narayanan, C.
    Powiązania:
    https://bibliotekanauki.pl/articles/354796.pdf
    Data publikacji:
    2018
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    FLD
    SPIF
    MPIF
    void coalescence
    strain distribution
    Opis:
    Single point incremental forming process is a most economical Die-less forming process. The major constraint of it is that it is a time consuming process. In this work, a new attempt was made in incremental forming process using Multipoint tool for SS430 sheets to increase the formability and to reduce forming time. Fractography analysis was made to study the size of voids that were formed during fracture. The forming limit diagrams were drawn and compared for single point incremental forming and the multipoint incremental forming of SS430 sheet. It was proved that the formability of SS430 sheet in the multipoint forming was better than the formability of that in single point forming and the time consumed was reduced. The strain distribution in both processes had also been studied along with surface roughness.
    Źródło:
    Archives of Metallurgy and Materials; 2018, 63, 4; 1709-1714
    1733-3490
    Pojawia się w:
    Archives of Metallurgy and Materials
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    The Effect Of Void Formation On The Reliability Of ED-XRF Measurements In Lead-Free Reflow Soldering
    Wpływ powstawania pustek na wiarygodność badań ED-XRF bezołowiowych złączy lutowanych rozpływowo
    Autorzy:
    Koncz-Horváth, D.
    Gergely, G.
    Gacsi, Z.
    Powiązania:
    https://bibliotekanauki.pl/articles/355754.pdf
    Data publikacji:
    2015
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    EDXRF
    lead-free
    void
    intermetallic
    reflow
    ED-XRF
    złącze bezołowiowe
    pustka lutownicza
    lutowanie rozpływowe
    cząstka międzymetaliczna
    Opis:
    In lead-free reflow soldering, the presence of voids should be taken into account. For this reason, the effect of the applied heating profiles was examined via the characterization of voids in galvanic and immersion Sn coatings. According to EU Directive 2002/95/EC, the screening of Pb element of reflow soldering (i.e. of electrical and electronic equipment) is necessary; and the practical implementation of this measurement is largely affected by the characteristics of the solder (i.e. the presence of voids and the inhomogeneity of the solder). Comparing the results of the above two coating methods, it was found that by chemical coating more voids were formed and the detected lead content was higher than for galvanic Sn. The standard deviation of Ag and Cu concentrations was mainly influenced by the appearance of large compounds in the second case, while with chemical coating, no large compounds were formed due to the elevated number of voids.
    Źródło:
    Archives of Metallurgy and Materials; 2015, 60, 2B; 1445-1448
    1733-3490
    Pojawia się w:
    Archives of Metallurgy and Materials
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Experimental determination of the void volume fraction for S235JR steel at failure in the range of high stress triaxialities
    Autorzy:
    Kossakowski, P. G.
    Powiązania:
    https://bibliotekanauki.pl/articles/354784.pdf
    Data publikacji:
    2017
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    failure
    critical void volume fraction
    Gurson-Tvergaard-Needleman material model
    S235JR steel
    high stress triaxiality
    Opis:
    This paper is concerned with the critical void volume fraction fF representing the size of microdefects in a material at the time of failure. The parameter is one of the constants of the Gurson-Tvergaard-Needleman (GTN) material model that need to be determined while modelling material failure processes. In this paper, an original experimental method is proposed to determine the values of fF. The material studied was S235JR steel. After tensile tests, the void volume fraction was measured at the fracture surface using an advanced technique of quantitative image analysis The material was subjected to high initial stress triaxialities T0 ranging from 0.556 to 1.345. The failure processes in S235JR steel were analysed taking into account the influence of the state of stress.
    Źródło:
    Archives of Metallurgy and Materials; 2017, 62, 1; 167-172
    1733-3490
    Pojawia się w:
    Archives of Metallurgy and Materials
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-5 z 5

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