Dielectric elastomer can undergo giant deformation, but are susceptive to various failure modes. i.e electrical breakdown.
Some experimental papers (Kofod, Plante, Chen, see the attachment) reported the dielectric strength of VHB material (a kind of dielectric elastomer) under difference pre-stretch, equal bi-axially or unequal bi-axially. And the strength (maximum voltage can be applied before breakdown) has be greatly improved by these mechanical stretches.
So here comes the question: is the dielectric strength dependent or independent of stretch?
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