Extending the overlay method in order to capture the variation due to amplitude in the frequency dependence of the dynamic stiffness and loss during cyclic loading of elastomers

Summary, in English

The current work focus on the overlay method proposed by Austrell concerning frequency dependence of the dynamic modulus and loss angle that is known to increase more with frequency for small amplitudes than for large amplitudes. The original version of the overlay method yields no difference in frequency dependence with respect to different load amplitudes. However, if the elements in the viscoelastic layer of the finite element model are given different stiffness and loss properties depending on the loading amplitude level, frequency dependence is shown to be more accurate compared to experiments. The commercial finite element program Ansys is used to model an industrial metal rubber part using two layers of elements. One layer is a hyper viscoelastic layer and the other layer uses an elasto-plastic model with a multi-linear kinematic hardening rule. The model, being intended for stationary cyclic loading, shows good agreement with measurements on the harmonically loaded industrial rubber part.

• Författare: Z. Kareaga; T. Guraya; A. Arriaga; P. E. Austrell
• Avdelning/ar: Byggnadsmekanik
• Publiceringsår: 2015
• Språk: Engelska
• Sidor: 205-218
• Publikation/Tidskrift/Serie: Constitutive Models for Rubber IX - Proceedings of the 9th European Conference on Constitutive Models for Rubbers, ECCMR
• Dokumenttyp: Konferensbidrag
• Förlag: CRC Press/Balkema
• Ämne: Textile, Rubber and Polymeric Materials
• Conference name: 9th European Conference on Constitutive Models for Rubbers, ECCMR 2015
• Conference date: 2015-09-01 - 2015-09-04
• Conference place: Prague, Czech Republic
• Status: Published
• ISBN/ISSN/Övrigt: ISBN: 9781138028739