Dielectric elastomers membrane materials

In one of the first papers dealing with dielectric elastomers, Pelrine et al. (1998) proposed a widely used model to analyze stresses and strains in a thin elastomeric membrane subjected to a transverse electric field. The notion of Maxwell s pressure Pel = eE is well known among the EAP research community. How does this concept match with the theory developed here This can be easily explained recalling that fire stress measure adopted by Pelrine et al. (1998) corresponds to our and their model is valid only for incompressible materials. 

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