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Proposal of hyperelastic proportional damping as dissipated energy model of hard rubbers

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    0474714 - ÚT 2018 RIV CZ eng C - Konferenční příspěvek (zahraniční konf.)
    Šulc, Petr - Pešek, Luděk - Bula, Vítězslav - Košina, Jan - Cibulka, Jan
    Proposal of hyperelastic proportional damping as dissipated energy model of hard rubbers.
    Engineering Mechanics 2017. Brno: University of technology, Institute of Solid Mechanics, Mechatronics and Biomechanics, 2017 - (Fuis, V.), s. 942-945. ISBN 978-80-214-5497-2. ISSN 1805-8248.
    [Engineering Mechanics 2017 /23./. Svratka (CZ), 15.05.2017-18.05.2017]
    Grant CEP: GA ČR GA16-04546S
    Institucionální podpora: RVO:61388998
    Klíčová slova: torsion vibration * large deformation * hyperelasticity * dissipated energy * deformation energy
    Kód oboru RIV: BI - Akustika a kmity
    Obor OECD: Applied mechanics

    The paper deals with a stress analysis of hard rubber under large torsion deformations. This study was motivated by effort to find the dependency the dissipated energy on the deformation energy. Based on the results of an experiment, a function of dissipation energy of hard rubbers for finite strains using the theory hyperelasticity was proposed herein analogically as a proportional damping for elastic theory. Samples of hard rubber of different hardness (EPDM, Silicone) were dynamically tested on the developed torsional test-rig at different frequencies, amplitudes. First the Mooney Rivlin model (MRM) for a shear case of loading was analytically developed and then MRM constants were attained by fitting of the MRM to the experimental torsion-deformation curve. These constants were used to obtain the deformation energy of the MRM models. The coefficients of hyperelastic proportional damping relating a dissipated energy to a strain energy were evaluated for tested rubbers on the basis of experimental results.
    Trvalý link: http://hdl.handle.net/11104/0273604
     
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