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Influence of large strain preloads on the viscoelastic response of rubber-like materials under small oscillations

Abstract : The viscoelastic response predicted by linearized internal variables models in the case of small oscillations superimposed on a large static preload is investigated, comparing simple forms of the Zener and the Poynting–Thomson models. It is shown that both of them predict a preload dependency of the equilibrium linearized stress, but only the latter take into account such a dependency on the out-of-equilibrium part. Yet, the Zener model is much more frequently linearized as the Poynting–Thomson model. The formulation of each model for finite deformations is quickly reminded, before linearizing them around a large static preload. Finally, a comparison of the influence of preload on each model is proposed for uniaxial extension, before discussing which kind of model has to be chosen regarding theoretical and practical aspects.
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https://hal.archives-ouvertes.fr/hal-03286600
Contributor : Mathias Legrand <>
Submitted on : Wednesday, July 28, 2021 - 10:10:55 PM
Last modification on : Tuesday, September 21, 2021 - 4:06:09 PM

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Anne-Sophie Lectez, Erwan Verron. Influence of large strain preloads on the viscoelastic response of rubber-like materials under small oscillations. International Journal of Non-Linear Mechanics, Elsevier, 2016, 81, ⟨10.1016/j.ijnonlinmec.2015.12.003⟩. ⟨hal-03286600⟩

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