1. Date of download: 10/18/2017
Copyright © ASME. All rights reserved.
From: Morphology of Voltage-Triggered Ordered Wrinkles of a Dielectric Elastomer Sheet
J. Appl. Mech. 2017;84(11): doi: /
Figure Legend:
Schematic diagram of experimental setup and experimental results. (a) A DE sheet of length ls10 and width ls20 is stretched to ls21 with two ends boned to two rigid bars. Then, a solid frame is boned to the center of DE sheet and the part in the center of solid frame is cut off as DE specimen. (b) A DE specimen is coated with electrodes on both its sides. When voltage is applied, striplike ordered wrinkle nucleates. (c) The experimental setup for measuring the morphology of wrinkles. (d) Top-view images of flat and wrinkled DE specimen made of VHB 4905 when voltage (10 kV) is off and on. The dimensions of DE specimen are lf1=5 cm and lf2=10 cm with prestretch λ11=1.5. (e) The morphology of wrinkles of DE specimen in Fig. 1(d) with varying applying voltage measured by a laser displacement sensor.

2. Date of download: 10/18/2017
Copyright © ASME. All rights reserved.
From: Morphology of Voltage-Triggered Ordered Wrinkles of a Dielectric Elastomer Sheet
J. Appl. Mech. 2017;84(11): doi: /
Figure Legend:
The wavelength and amplitude of wrinkles of experimental results (symbols, ∗, Δ, and ○) and theoretical predictions (solid lines). (a) The relationship of dimensionless wrinkle wavelength versus the geometry of solid frame and prestretch for different DEs subjected to voltages. The slope of the solid line is Dimensions and prestretches of DE specimens of the DE specimens are listed in supplementary material, which is available under the “Supplemental Materials” tab for this paper on the ASME Digital Collection. (b) The relationship of amplitude versus applying voltage for different DE materials, VHB 9473 (t0=0.25 mm), VHB 4905 (t0=0.5 mm) and VHB4910 (t0=1 mm). The dimensions of solid frame are lf1=lf2=10 cm, and the prestretch of DE sheet is λ11=1.5. (c) The relationship of amplitude versus applying voltage for different prestretches (λ11=1.5, 3, and 4) of DE sheets made of VHB The dimensions of solid frame are lf1=5 cm and lf2=10 cm. (d) The relationship of amplitude versus applying voltage for DE sheets made of VHB 4905 with different aspect ratios ls1/ls2=4/3, 6/3, and 12/3. The dimension of solid frame is lf1=lf2=10 cm.

3. Date of download: 10/18/2017
Copyright © ASME. All rights reserved.
From: Morphology of Voltage-Triggered Ordered Wrinkles of a Dielectric Elastomer Sheet
J. Appl. Mech. 2017;84(11): doi: /
Figure Legend:
The schematic diagram of a smart window and experimental demonstration. (a) The structure of a smart window consists of a DE sheet sandwiched by saline water and packaged with transparent plastic. (b) The principle of smart switchable window. When voltage is off, light can pass through along its original direction. Otherwise, wrinkles nucleate and light will be refracted and deviated from its original direction. Then, the window will be obscure. (c) Demonstration of smart window with voltage off and on.