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

Youngsu Cha, Maurizio Porfiri

Research output: Contribution to journalConference articlepeer-review


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 (US)
Article number94300G
JournalProceedings of SPIE - The International Society for Optical Engineering
Issue numberJanuary
StatePublished - 2015
EventElectroactive Polymer Actuators and Devices (EAPAD) 2015 - San Diego, United States
Duration: Mar 9 2015Mar 12 2015


  • 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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