Delayed electromechanical instability of a viscoelastic dielectric elastomer balloon.

Xiongfei Lv, Liwu Liu, Jinsong Leng, Yanju Liu, Shengqiang Cai

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Article in Proceedings. Mathematical, physical, and engineering sciences, 2019. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.

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5 authors.

Xiongfei LvDepartment of Astronautic Science and Mechanics, Harbin Institute of Technology (HIT), PO Box 301, No. 92 West Dazhi Street, Harbin 150001, People's Republic of China.

Liwu LiuDepartment of Astronautic Science and Mechanics, Harbin Institute of Technology (HIT), PO Box 301, No. 92 West Dazhi Street, Harbin 150001, People's Republic of China.

Jinsong LengCentre for Composite Materials and Structures, Science Park of Harbin Institute of Technology (HIT), PO Box 3011, No. 2 Yikuang Street, Harbin 150080, People's Republic of China.

Yanju LiuDepartment of Astronautic Science and Mechanics, Harbin Institute of Technology (HIT), PO Box 301, No. 92 West Dazhi Street, Harbin 150001, People's Republic of China.

Shengqiang CaiDepartment of Mechanical and Aerospace Engineering, University of California, San Diego, La Jolla, CA 92093, USA.ORCID 0000-0002-6852-7680

Funding

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6 · The paper itself

Abstract

When a dielectric elastomer (DE) balloon is subjected to electromechanical loading, instability may happen. In recent experiments, it has been shown that the instability configuration of a DE balloon under electromechanical loading can be very different from that only subjected to mechanical load. It has also been observed in the experiments that the electromechanical instability phenomena of a DE balloon can be highly time-dependent. In this article, we adopt a nonlinear viscoelastic model for the DE membrane to investigate the time-dependent electromechanical instability of a DE balloon. Using the model, we show that under a constant electromechanical loading, a DE balloon may gradually evolve from a convex shape to a non-convex shape with bulging out in the centre, and compressive hoop stress can also gradually develop the balloon, resulting in wrinkles as observed in the experiments. We have further shown that the snap-through instability phenomenon of the DE balloon also greatly depends on the ramping rate of the applied voltage.

Indexed as

delayelectromechanical instabilitynon-convexsnap-throughviscoelasticity

Identifiers

PMID31611728

DOI10.1098/rspa.2019.0316

PMCPMC6784404

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