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    Wyświetlanie 1-3 z 3
    Tytuł:
    Numerical modeling of porous ceramics microstructure
    Autorzy:
    Miedzińska, Danuta
    Powiązania:
    https://bibliotekanauki.pl/articles/298116.pdf
    Data publikacji:
    2019
    Wydawca:
    Uniwersytet Warmińsko-Mazurski w Olsztynie
    Tematy:
    porous ceramics
    finite element method
    microstructure
    Opis:
    The presented research is directed to the porous ceramics microstructural behaviour assessment with the use of numerical methods. Such new material can be used for thermal insulation, filters, bio-scaffolds for tissue engineering, and preforms for composite fabrication. One of the newest and most interesting applications, considered in this work, is a usage of those materials for production of proppants for hydraulic fracturing of shale rocks. The hydraulic fracturing is a method of gas recovery from unconventional reservoirs. A large amount of fracturing fluid mixed with proppant (small particles of sand or ceramics) is pumped into the wellbore and its pressure causes the rock cracking and gas release. After fracturing the fluid is removed from the developed cracks leaving the proppant supporting the fracture. In the paper the grain porous ceramics which is used for proppant particles preparation was studied. The influence of grains distribution on the porous ceramics mechanical behaviour during compression was simulated with the use of finite element method.
    Źródło:
    Technical Sciences / University of Warmia and Mazury in Olsztyn; 2019, 22(1); 5-17
    1505-4675
    2083-4527
    Pojawia się w:
    Technical Sciences / University of Warmia and Mazury in Olsztyn
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Selection of material model of chosen photocurable resin for application in finite element analyses
    Autorzy:
    Miedzińska, Danuta
    Powiązania:
    https://bibliotekanauki.pl/articles/1835546.pdf
    Data publikacji:
    2020
    Wydawca:
    Uniwersytet Warmińsko-Mazurski w Olsztynie
    Tematy:
    additive manufacturing
    photocurable material
    Finite Element Method
    constitutive models
    Opis:
    In the paper, a literature study of a modelling methods of a photocurable materials developed by additive techniques is presented. The main aim was to assess which material model is appropriate for such kinds of matter. The Finite Element Method and the LS Dyna software was assumed as a possible environment for the investigations. The material models that can be apply for photopolymers analysing were described as well as examples of such materials. The conclusions is that the material model selection must be based on the observation of the material behaviour and the possible loading conditions (e.g. strain rate).
    Źródło:
    Technical Sciences / University of Warmia and Mazury in Olsztyn; 2020, nr 23(4); 323-336
    1505-4675
    2083-4527
    Pojawia się w:
    Technical Sciences / University of Warmia and Mazury in Olsztyn
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Application of 3D printing technology for mechanical properties study of the photopolymer resin used to print porous structures
    Autorzy:
    Małek, Ewelina
    Miedzińska, Danuta
    Popławski, Arkadiusz
    Szymczyk, Wiesław
    Powiązania:
    https://bibliotekanauki.pl/articles/950080.pdf
    Data publikacji:
    2019
    Wydawca:
    Uniwersytet Warmińsko-Mazurski w Olsztynie
    Tematy:
    mechanical properties
    rapid prototyping
    SLA
    stereolitography
    fractal models
    Opis:
    In the field of numerical research there are various approaches and methods for structures of porous materials modeling. The solution is the use of fractal models to develop the porous structure. In the case of modeling the geometry of natural (random) materials, there is a problem of compatibility of the FE model geometry and real one. This is a source of differences between the results of calculations and experimental ones. Application of 3D printing technology will allow to receive a real structure in a controlled manner, which exactly reflects the designed structure and is consistent with the geometry of the numerical model. An experimental research on the standard samples made of photopolymer resin using 3D printing technique was presented in the paper. The aim of the research was to determine the base material properties and, consequently, to select the constitutive model, which is necessary to carry out numerical analyses.
    Źródło:
    Technical Sciences / University of Warmia and Mazury in Olsztyn; 2019, 22(2); 183-194
    1505-4675
    2083-4527
    Pojawia się w:
    Technical Sciences / University of Warmia and Mazury in Olsztyn
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-3 z 3

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