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    Wyświetlanie 1-3 z 3
    Tytuł:
    Use of 3D simulation to design theoretical and real pipe inspection mobile robot model
    Autorzy:
    Baranowski, L.
    Siwek, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/386506.pdf
    Data publikacji:
    2018
    Wydawca:
    Politechnika Białostocka. Oficyna Wydawnicza Politechniki Białostockiej
    Tematy:
    pipe inspection
    robot model
    inspection robot
    mobile robot
    3d simulation
    Opis:
    The main aim of the paper is to present the process of design pipe inspection mobile robot by using 3D simulations. Next methods and processes of making designed components was described. Finally, functional tests of a constructed real robot model such as speed tests, inclined pipe test was carried out. The robot was specifically designed to inspect sewer pipelines. The mobile robot is equipped with a vision system. The structure of the pipe inspection robot allows adjustments to the geometrical parameters of the robot to suit the sewer pipes diameters by using in the construction of a pneumatic system with an actuator.
    Źródło:
    Acta Mechanica et Automatica; 2018, 12, 3; 232-236
    1898-4088
    2300-5319
    Pojawia się w:
    Acta Mechanica et Automatica
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Dynamic testing of copper material : numerical approach
    Autorzy:
    Baranowski, P.
    Małachowski, J.
    Mazurkiewicz, Ł.
    Damaziak, K.
    Powiązania:
    https://bibliotekanauki.pl/articles/387353.pdf
    Data publikacji:
    2013
    Wydawca:
    Politechnika Białostocka. Oficyna Wydawnicza Politechniki Białostockiej
    Tematy:
    miedź
    sprężanie
    analiza elementów skończonych
    SHPB
    copper
    compression
    FE analysis
    Opis:
    Split Hopkinson pressure bar (SHPB) is one of the most important and recognisable apparatus used for characterizing the dynamic behaviour of various materials. Incident pulse generated one the incident bar usually have a rectangular shape, which is proper for some materials but for others is not. Therefore, several methods of shaping the incident pulse are used for obtaining constant strain rate conditions during tests. Very often pulse shapers made of copper or similar material are implemented due to its softness properties. In this paper such material was investigated using the FE model of SHPB. Its mechanical behaviour was characterised with and without copper disc between the striker and incident bar. Numerical simulations were carried out using explicit LS-DYNA code. Two different methods were used for modelling the copper sample: typical finite Lagrangian elements and meshless Smoothed Particle Hydrodynamics (SPH) method. As a result of two techniques used axial stress-strain characteristics were compared for three different striker’s velocity with an influence of the copper pulse shaper taking into account. Finally, FE and SPH method was compared with taking into consideration: the efficiency, computer memory and power requirements, complexity of methods and time of simulation.
    Źródło:
    Acta Mechanica et Automatica; 2013, 7, 4; 195-202
    1898-4088
    2300-5319
    Pojawia się w:
    Acta Mechanica et Automatica
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Identification of layers distribution in the composite coupon using finite element method and three point bending test
    Autorzy:
    Mazurkiewicz, Ł.
    Małachowski, J.
    Damaziak, K.
    Baranowski, P.
    Gotowicki, P.
    Powiązania:
    https://bibliotekanauki.pl/articles/387164.pdf
    Data publikacji:
    2013
    Wydawca:
    Politechnika Białostocka. Oficyna Wydawnicza Politechniki Białostockiej
    Tematy:
    fibre reinforced composite
    FE analysis
    hand lay-up technique
    experimental validation
    kompozyt włóknisty
    analiza elementów skończonych
    weryfikacja doświadczalna
    Opis:
    The main objective of the study is to develop experimentally validated FE model and perform numerical analysis of layered composites made by hand lay-up techniques during tension and bending test. The research object is glass - polyester laminate made of four unidirectional layers. In order to validate the numerical models experimental test were performed. Due to the very different stiffness modulus in tension and bending loading the material properties obtained from standard test are not suitable to apply in numerical model. Significantly different behaviour compared to experimental test was obtained for tree point bending where the numerical model becomes too stiff. Simple coupons, relatively easy to manufacture presented in the paper have very low quality. The differences in actual and theoretical bending stiffness (obtained from tension stiffness) exceed 70%. In order to represent the actual structure the layers of the composite were divided by resin layers and also additional resin layer at the top and bottom of the model were defined. Single stage optimization process was used to adjust the material layout. After layer set-up modification very significant improvement can be seen for flexural behaviour.
    Źródło:
    Acta Mechanica et Automatica; 2013, 7, 3; 160-165
    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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