Počet záznamů: 1
Torsion dissipated energy of hard rubbers as function of hyperelastic deformation energy of the Yeoh
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SYSNO ASEP 0497769 Druh ASEP J - Článek v odborném periodiku Zařazení RIV J - Článek v odborném periodiku Poddruh J Článek ve SCOPUS Název Torsion dissipated energy of hard rubbers as function of hyperelastic deformation energy of the Yeoh Tvůrce(i) Šulc, Petr (UT-L) RID
Pešek, Luděk (UT-L) RID
Bula, Vítězslav (UT-L) RID
Košina, Jan (UT-L) RID
Cibulka, Jan (UT-L)Celkový počet autorů 5 Zdroj.dok. Applied and Computational Mechanics - ISSN 1802-680X
Roč. 12, č. 1 (2018), s. 111-118Poč.str. 9 s. Forma vydání Tištěná - P Jazyk dok. eng - angličtina Země vyd. CZ - Česká republika Klíč. slova first invariant deformation ; simple shear ; deformation energy Vědní obor RIV BI - Akustika a kmity Obor OECD Applied mechanics CEP GA16-04546S GA ČR - Grantová agentura ČR Institucionální podpora UT-L - RVO:61388998 EID SCOPUS 85059859377 DOI 10.24132/acm.2018.422 Anotace In this paper, we are proposing a new formulation of dissipated energy of hard rubbers as a function of the deformation energy expressed by the Yeoh hyperelastic model. Torsion deformation is considered as a planar deformation of a simple shear on the surface of a cylinder. Thus the deformation energy is dependent only on the first invariant of strain. Based on the experiment, a “hyperelastic proportional damping” (HPD) is proposed for hard rubbers under finite strains. Such damping is analogical to the model of proportional damping in the linear theory of viscoelasticity, i.e. the dissipated energy is proportional to the deformation energy multiplied by the frequency of dynamic harmonic loading. To obtain the experimental data, samples of hard EPDM rubbers of different harnesses were dynamically tested on a torsional test rig for different frequencies and amplitudes. The Yeoh model is chosen since the deformation function is dependent only on the first strain invariant for the description of the simple shear of a surface cylinder. The Yeoh constants are evaluated by curve fitting of the analytical stress function to the experimental torsion stress-deformation curve. The constants are used to express the deformation energy of the Yeoh model for specific cases of tested rubbers. The coefficients of hyperelastic proportional damping are evaluated on the basis of experimental results. Pracoviště Ústav termomechaniky Kontakt Marie Kajprová, kajprova@it.cas.cz, Tel.: 266 053 154 ; Jana Lahovská, jaja@it.cas.cz, Tel.: 266 053 823 Rok sběru 2019
Počet záznamů: 1