Constitutive modeling of the Mullins effect and cyclic stress softening in filled elastomers
Author(s)
Dargazany, Roozbeh; Itskov, Mikhail
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The large strain behavior of filled rubbers is characterized by the strong Mullins effect, permanent set, and induced anisotropy. Strain controlled cyclic tests also exhibit a pronounced hysteresis as a strain rate independent phenomenon. Prediction of these inelastic features in elastomers is an important challenge with immense industrial and technological relevance. In the present paper, a micromechanical model is proposed to describe the inelastic features in the behavior of filled elastomers. To this end, the previously developed network decomposition concept [Dargazany and Itskov Int. J. Solids Struct. 46 2967 (2009)] is extended and an additional network (CP network) is added to the classical elastic rubber (CC) and polymer-filler (PP) networks. The new network is considered to account for the damage of filler aggregates in the cyclic deformation as the source of hysteresis energy loss. The accuracy of the resulting model is evaluated in comparison to a new set of experimental data.
Date issued
2013-07Department
Massachusetts Institute of Technology. Department of Materials Science and EngineeringJournal
Physical Review E
Publisher
American Physical Society
Citation
Dargazany, Roozbeh, and Mikhail Itskov. “Constitutive modeling of the Mullins effect and cyclic stress softening in filled elastomers.” Physical Review E 88, no. 1 (July 2013). © 2013 American Physical Society
Version: Final published version
ISSN
1539-3755
1550-2376