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    Wyświetlanie 1-4 z 4
    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
    Tytuł:
    Viability analysis of pine sawdust drying in a fountain dryer
    Autorzy:
    Rojcewicz, Konrad
    Oksiuta, Zbigniew
    Powiązania:
    https://bibliotekanauki.pl/articles/1835551.pdf
    Data publikacji:
    2020
    Wydawca:
    Uniwersytet Warmińsko-Mazurski w Olsztynie
    Tematy:
    sawdust
    fountain dryer
    fountain bed
    conical spouted bed
    pellets
    sieving analysis
    BET method
    Opis:
    This article presents an analysis of the physico-chemical properties of pine sawdust originating from the area of the Knyszyńska Forest, in the context of the possibility of the sawdust drying in a fountain dryer. Several tests were carried out on dry pine sawdust with 45% moisture, including chemical composition, calorific value, ash content as well as morphological changes of wet and dried material. The water storage mechanism in chips and the mechanism of formation of a fountain bed were also discussed. Based on the obtained results, several technical solutions and modifications of the fountain dryer were proposed. These modifications enable sawdust of heterogeneous size and shape to be dried in a fountain dryer as well as additional functional properties.
    Źródło:
    Technical Sciences / University of Warmia and Mazury in Olsztyn; 2020, nr 23(3); 263-280
    1505-4675
    2083-4527
    Pojawia się w:
    Technical Sciences / University of Warmia and Mazury in Olsztyn
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Modification of PLA with nano-iron particles for biomedical applications
    Autorzy:
    Wiński, Hubert
    Trusiewicz, Dorota
    Oksiuta, Zbigniew
    Powiązania:
    https://bibliotekanauki.pl/chapters/2204281.pdf
    Data publikacji:
    2022
    Wydawca:
    Politechnika Białostocka. Oficyna Wydawnicza Politechniki Białostockiej
    Tematy:
    PLA
    modifiers
    iron powders
    mechanical properties
    composite
    PEG blend
    Opis:
    The current problem of biopolymer composites in biomaterial engineering is their long degradation over time under environmental interactions and their potential application in biomedical engineering. The present research work aims to study the properties of a PLA composite with addition of iron and nano-iron powders with a particle size of 45 μm and 80 nm, respectively, in an isotonic solution in the Ringer fluid. The paper describes the general properties of polylactide composites and the mechanisms of degradation after modification with different additives, among them iron powders and polyethylene glycol (PEG)-based blends, where the PLA-nanoFe-PEG liquid blend has the best mechanical properties. The areas of biomedical applications of the PLA-based composite were also presented. In the research part of the PLA composite fabricated by the extrusion method, hardness, tensile strength and degradation in Ringer’s solution of the obtained composites were studied and discussed.
    Źródło:
    Advances in biomedical engineering; 153–164
    9788367185400
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Advances in biomedical engineering
    Autorzy:
    Pauk, Jolanta
    Dardzińska-Głębocka, Agnieszka
    Mrozek, Piotr
    Oksiuta, Zbigniew
    Daunoravičienė, Kristina
    Kostka, Paweł
    Data publikacji:
    2022
    Wydawca:
    Politechnika Białostocka. Oficyna Wydawnicza Politechniki Białostockiej
    Opis:
    Over the thirty years, as the discipline of biomedical engineering has evolved at the Bialystok University of Technology, it has become clear that it is a youthful and developing interdisciplinary field. Biomedical engineers provide innovative technological solutions for the medical industry by designing prosthetic limbs and artificial organs, the material that is used to manufacture them, and the software that's used for medical equipment. Although it is not possible to cover all of the biomedical engineering domains in this book, we have made an effort to focus on most of the major fields of activity in which scientists at Bialystok University Technology are engaged. The chapters throughout the book feature current research and developments in, for example, biomechanics, mechanobiology, design of medical structures, technical rehabilitation measures, modern engineering materials and their production, biomedical signal processing, acquisition and exploration of information from medical databases, and medical 3D printing. This book is dedicated to students of biomedical engineering and high school students interested in studying the interdisciplinary course of Biomedical Engineering. Our aim is to help young people understand the nature of biomedical engineering, which links engineering techniques with biological sciences and medicine to improve the quality of human health and well-being.
    Dostawca treści:
    Biblioteka Nauki
    Książka
      Wyświetlanie 1-4 z 4

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