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Experimental Investigations on and Modelling of the Transient Phenomena of the Payne‐Effect.
Author(s) -
Höfer Philipp,
Lion Alexander
Publication year - 2008
Publication title -
pamm
Language(s) - English
Resource type - Journals
ISSN - 1617-7061
DOI - 10.1002/pamm.200810425
Subject(s) - viscoelasticity , natural rubber , carbon black , elastomer , phenomenological model , relaxation (psychology) , materials science , amplitude , stiffness , microstructure , mechanics , work (physics) , statistical physics , thermodynamics , physics , composite material , optics , condensed matter physics , psychology , social psychology
The wide majority of industrially–used rubber is filled with a considerable amount of active fillers like carbon black or silica. Due to this, the material is strengthend and mechanical key features like stiffness and strength are significantly increased. In contrast to unfilled rubber, filled elastomers show a pronounced amplitude dependence, which is widely known as Fletcher–Gent or Payne effect. Besides that, some recently published works show a significant history dependence of this effect with distinctive relaxation phenomena. In the present work, some experiments on typical tyre rubber compounds with focus on these amplitude dependent phenomena are presented. On this basis, an appropriate thermodynamic consistent phenomenological material model of finite viscoelasticity is introduced. In order to incorporate the history dependent phenomena of the amplitude dependence, this model is generalized with intrinsic time scales on the basis of inner structure variables, which are a measure of the materials microstructure. The performance of the model is critically demonstrated by a few simulation results. (© 2008 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)