Experiments and modeling of the coupled viscoelasticity and Mullins effect in filled rubber materials

Keven Alkhoury, Robert Ivko, Mokarram Hossain, Siva Nadimpalli, Shawn A. Chester

Research output: Contribution to journalArticlepeer-review


Filled rubber-like materials are widely used in engineering applications, and are known to exhibit a rate-dependent non-linear inelastic behavior, and stress-softening, also known as the Mullins effect is frequently encountered. In this work, we characterized and modeled the constitutive response of a handful of commercially available filled rubber-like materials. We first perform a set of large-deformation uniaxial experiments at room temperature and at multiple rates. Those experimental findings are used to develop and calibrate a thermodynamically consistent constitutive model, which is then numerically implemented in a finite element package by writing a user material subroutine. The constitutive model is validated by comparing the results of an inhomogeneous experiment and simulation. A key finding of this work is that the mechanisms that cause the Mullins effect appear to be the main drivers of viscoelasticity in the materials used here.

Original languageEnglish (US)
Article number105650
JournalJournal of the Mechanics and Physics of Solids
StatePublished - Jul 2024

All Science Journal Classification (ASJC) codes

  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering


  • Inelastic
  • Large deformations
  • Mullins effect
  • Nonlinear
  • Viscoelastic


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