Harnessing snap-through instability in soft dielectrics to achieve giant voltage-triggered deformation
Sprache des Titels:
A soft dielectric membrane is prone to snap-through instability. We
present theory and experiment to show that the instability can be
harnessed to achieve giant voltage-triggered deformation.Wemount
a membrane on a chamber of a suitable volume, pressurize the
membrane into a state near the verge of the instability, and apply
a voltage to trigger the snap without causing electrical breakdown.
For an acrylic membrane we demonstrate voltage-triggered expansion
of area by 1692%, far beyond the largest value reported in the
literature. The large expansion can even be retained after the voltage
is switched off.