A physics-based model for actuation and sensing of ionic polymer metal composites

Youngsu Cha, Maurizio Porfiri

Research output: Contribution to journalConference articlepeer-review

1 Citation (Scopus)


In this paper, we propose a novel modeling framework to study quasi-static large deformations and electrochemistry of ionic polymer metal composites (IPMCs). The chemoelectromechanical constitutive behavior is obtained from a Helmholtz free energy density, which accounts for mechanical stretching, ion mixing, and electric polarization. The framework is specialized to plane bending of thin IPMCs through a structural model, where the bending moment of the IPMC is computed from a one-dimensional modified Poisson-Nernst-Planck system. For small static deformations, we establish a semianalytical solution based on the method of matched asymptotic expansions, which we ultimately use to elucidate the physics of IPMC sensing and actuation.

Original languageEnglish
Article number94300G
JournalProceedings of SPIE - The International Society for Optical Engineering
Issue numberJanuary
Publication statusPublished - 2015
Externally publishedYes
EventElectroactive Polymer Actuators and Devices (EAPAD) 2015 - San Diego, United States
Duration: 2015 Mar 92015 Mar 12


  • Actuation
  • Poisson-Nernst-Planck
  • electroactive polymer
  • ionic polymer metal composite
  • perturbation method
  • physicsbased model
  • sensing

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Computer Science Applications
  • Applied Mathematics
  • Electrical and Electronic Engineering


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