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The data show reported critical breakdown voltages as a function of the equibiaxial prestrain for films of VHB elastomer, from Refs. 3 and 4. The curves are the predictions of Eq. (9) using the elasticity parameters from Ref. 3 with .
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The model of Zhao and Suo can be readily generalized to predict the critical breakdownelectric field of elastomers with arbitrary elastic strain energy function. An explicit expression for is presented for elastomeric thin films under biaxial strain and comparisons are made with experimental data using a two term Ogden rubberelasticity model. Simplified results for uniaxial and for equibiaxial stress provide further insight into the electromechanical stability model.
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