Electromechanics of ionoelastic beams as electrically controllable artificial muscles

Mohsen Shahinpoor

doi:10.1117/12.349669

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28 May 1999 Electromechanics of ionoelastic beams as electrically controllable artificial muscles

Mohsen Shahinpoor

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Proceedings Volume 3669, Smart Structures and Materials 1999: Electroactive Polymer Actuators and Devices; (1999) https://doi.org/10.1117/12.349669
Event: 1999 Symposium on Smart Structures and Materials, 1999, Newport Beach, CA, United States

Abstract

Presented are theoretical and experimental results on electrically controlled static and dynamic flexing and deformation of iono-elastic beams made with ionic-polymer metal composite (IPMC) artificial muscles. These composite materials have the capability of large motion sensing and actuation in a biomimetic fashion. The essence of the underlying iono-elastic response of such materials is due to Coulombic electro-dynamic charge interaction amongst a dispersed phase of metallic particles that are charged either positively or negatively, mobile phase of a cation such as hydrogen ions H⁺ (Protons) or Li+, Hydroxyl anions OH^-, and a fixed anionic phase such as an assembly of sulfonates SO₃^- elastically attached to the backbone polymer network macromolecules. The mathematical model presented is analogous to classical Euler-Bernoulli's beam theory modified to accommodate a non-homoeneous distributed electrically-induced moment due to the presence of a non-homogeneous electric field in an elastic material. The presentation may be extended to materials governed by hyper- elasticity such as in rubber elasticity. Analytical solution obtained agree reasonably well with our experimental results on Cationic Polymer-Platinum Composites (CPPC) which are also reported in this paper.

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Mohsen Shahinpoor "Electromechanics of ionoelastic beams as electrically controllable artificial muscles", Proc. SPIE 3669, Smart Structures and Materials 1999: Electroactive Polymer Actuators and Devices, (28 May 1999); https://doi.org/10.1117/12.349669

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