Modelling the effects of various contents of fillers on the relaxation rate of elastomers |
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| Affiliation: | 1. Materials Chemistry, RWTH Aachen University, Kopernikusstr, 10, D-52074 Aachen, Germany;2. Technical and Macromolecular Chemistry, University of Paderborn, Warburger Str. 100, D-33098 Paderborn, Germany;1. Centre for Materials and Structures, School of Engineering, University of Liverpool, L69 3GH, UK;2. Diabetes & Cardiovascular Medicine, Nutritional Sciences Division, King''s College London, Franklin Wilkins Building, 150 Stamford Street, London SE1 9NH, UK;3. School of Materials, The University of Manchester, Manchester M13 9PL, UK;4. Cardiology Department, Klinikum Wels-Grieskirchen, Grieskirchnerstrasse 42, 4600 Wels, Austria;2. University of Texas at El Paso, 124 Bell Hall 500W University Ave., El Paso, TX 79968-0514, USA |
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| Abstract: | This paper describes numerical investigations conducted on filled rubbers. Some experimental data on stress relaxation tests carried out on various filled elastomers evidenced that increasing the content of rigid particles such as fillers or changes in the crystallization index, result in higher values of the stress relaxation rate. This result seems to indicate that higher rigid particle contents promote macroscopic viscoelastic strain. To better understand this effect, finite element analyses were carried out on axi-symmetric unit cells as well as unit cell for numerical homogenization with periodic computations. |
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