Open AccessComparative study of stress relaxation phenomenological constitutive modeling of carbon black-reinforced natural rubber-based compounds
Author(s) -
Manuel Alberto Guzmán Sánchez
Publication year - 2021
Publication title -
dyna
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.164
H-Index - 18
eISSN - 2346-2183
pISSN - 0012-7353
DOI - 10.15446/dyna.v88n216.89446
Subject(s) - viscoelasticity , carbon black , materials science , natural rubber , phenomenological model , stress relaxation , constitutive equation , creep , composite material , relaxation (psychology) , standard linear solid model , stress (linguistics) , hysteresis , dissipation , mechanics , thermodynamics , physics , finite element method , psychology , social psychology , linguistics , philosophy , quantum mechanics
The viscoelastic properties of rubber materials are caused by the combination of the dual response as an elastic solid and a viscous fluid. This behavior yields in time-dependent mechanical properties; thus, phenomena such as stress relaxation, creep, energy dissipation, hysteresis, and strain rate are observed. In this study, three different carbon black-reinforced natural rubber compounds were experimentally evaluated under stress relaxation and several linear phenomenological constitutive models were fitted to evaluate their viscoelastic parameters. It was observed that both the elastic and viscous parameters increase in a non-linear relation as the strain and carbon black content increase, and the viscous parameters were dependent on the configuration of the model. The Maxwell and Zener models exhibited fitting values of 76.08 and 95.10%, respectively, while the Wiechert model showed the best fitting values and can be adequately used to estimate the relaxation process of carbon black-reinforced natural rubber applications.