Nonlinear sensing of ionic polymer metal composites

Matteo Aureli, Maurizio Porfiri

Research output: Contribution to journalArticle

Abstract

In this paper, we develop a physics-based model for the charge dynamics of ionic polymer metal composites (IPMCs) in response to mechanical deformations. The proposed chemoelectromechanical model is based on the Poisson-Nernst-Planck system that describes the evolution of the voltage field and the counterion concentration as a dynamic strain is imposed to the IPMC. We use the method of matched asymptotic expansions to find a closed form solution for the Poisson-Nernst-Planck equations and derive an equivalent nonlinear circuit model that is amenable for parametric studies. We report results for a variety of loading scenarios to gather insight into the nonlinear characteristics of IPMC electrical response and their potential application in sensors and energy harvesting devices.

Original languageEnglish (US)
Pages (from-to)273-310
Number of pages38
JournalContinuum Mechanics and Thermodynamics
Volume25
Issue number2-4
DOIs
StatePublished - 2013

Keywords

  • Double-layer capacitance
  • Finite element analysis
  • Ionic polymer metal composite
  • Matched asymptotic expansion
  • Poisson-Nernst-Planck
  • Sensor

ASJC Scopus subject areas

  • Materials Science(all)
  • Mechanics of Materials
  • Physics and Astronomy(all)

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