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Modeling the hyperviscoelastic and stress-softening behaviors of S-SBR/CB-filled rubber compound using a multicomponent model

Modeling the hyperviscoelastic and stress-softening behaviors of S-SBR/CB-filled rubber compound... The aim of this study was to develop a new multicomponent model for the description of the mechanical behavior of hyperviscoelastic materials. It consists of three parallel networks referred to as A, B1, and B2. Network A corresponds to the time-independent or elastic behavior. This is expressed by an augmented hyperelastic equation to take the Mullins effect into account. Network B1 is, on the other hand, related to the strain and time-dependent nonlinear viscoelastic behavior of the compound. The last part, i.e., B2, which is the novel aspect of this work, is assumed to be associated with the stiffness and also breakdown and reformations of the filler–filler networks. In addition, to show the advantage of the present model over those previously developed, a classic two-network model (Zener-type) was also employed. Three rubber compounds based on S-SBR reinforced by different amounts of carbon blacks were prepared and tested under tensile and volumetric loads. The parameters of the model were determined using an optimization algorithm via comparison between experimentally measured stress vs. time data and their counterparts computed by the models. The findings show that the new model not only gives results that are more accurate but also the predicted parameters have more physical significance than the classic two-network model. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Mechanics of Time-Dependent Materials Springer Journals

Modeling the hyperviscoelastic and stress-softening behaviors of S-SBR/CB-filled rubber compound using a multicomponent model

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References (36)

Publisher
Springer Journals
Copyright
Copyright © The Author(s), under exclusive licence to Springer Nature B.V. 2022
ISSN
1385-2000
eISSN
1573-2738
DOI
10.1007/s11043-022-09550-3
Publisher site
See Article on Publisher Site

Abstract

The aim of this study was to develop a new multicomponent model for the description of the mechanical behavior of hyperviscoelastic materials. It consists of three parallel networks referred to as A, B1, and B2. Network A corresponds to the time-independent or elastic behavior. This is expressed by an augmented hyperelastic equation to take the Mullins effect into account. Network B1 is, on the other hand, related to the strain and time-dependent nonlinear viscoelastic behavior of the compound. The last part, i.e., B2, which is the novel aspect of this work, is assumed to be associated with the stiffness and also breakdown and reformations of the filler–filler networks. In addition, to show the advantage of the present model over those previously developed, a classic two-network model (Zener-type) was also employed. Three rubber compounds based on S-SBR reinforced by different amounts of carbon blacks were prepared and tested under tensile and volumetric loads. The parameters of the model were determined using an optimization algorithm via comparison between experimentally measured stress vs. time data and their counterparts computed by the models. The findings show that the new model not only gives results that are more accurate but also the predicted parameters have more physical significance than the classic two-network model.

Journal

Mechanics of Time-Dependent MaterialsSpringer Journals

Published: Sep 1, 2023

Keywords: Rubber; Hyperelastic; Nonlinear viscoelastic; Filler; Mullins effect

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