Abstract
We determine the relaxation of some transversally-isotropic energy densities, i.e. functions W : ℝ3×3→ [0,∞] with the property W(QFR) = W(F) for all Q ∈ SO (3) and all R ∈ SO (3) such that Rn0= n0, where n0is a fixed unit vector. One physically relevant example is a model for smectic A elastomers. We discuss the implications of our result for the computation of macroscopic stress–strain curves for this material and compare with experiment.
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