Rupture of a highly stretchable acrylic dielectric elastomer

Matt Pharr, Jeong-Yun Sun, Zhigang Suo

doi:10.1063/1.4721777

Rupture of a highly stretchable acrylic dielectric elastomer

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Matt Pharr

Harvard University School of Engineering and Applied Sciences, Kavli Institute for Bionano Science and Technology, , Cambridge, Massachusetts 02138, USA
Jeong-Yun Sun

Harvard University School of Engineering and Applied Sciences, Kavli Institute for Bionano Science and Technology, , Cambridge, Massachusetts 02138, USA
Zhigang Suo

Harvard University School of Engineering and Applied Sciences, Kavli Institute for Bionano Science and Technology, , Cambridge, Massachusetts 02138, USA

書誌事項

公開日: 2012-05-15

DOI

10.1063/1.4721777

公開者: AIP Publishing

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説明

<jats:p>Dielectric elastomer transducers are often subject to large tensile stretches and are susceptible to rupture. Here we carry out an experimental study of the rupture behavior of membranes of an acrylic dielectric elastomer. Pure-shear test specimens are used to measure force-displacement curves, using samples with and without pre-cracks. We find that introducing a pre-crack into a membrane drastically reduces the stretch at rupture. Furthermore, we measure the stretch at rupture and fracture energy using samples of different heights at various stretch-rates. The stretch at rupture is found to decrease with sample height, and the fracture energy is found to increase with stretch-rate.</jats:p>