The extension of the procedure of decomposition of elastic strain-energy density into basic elements in transversely isotropic materials which constitute laminae under plane stress conditions was derived, based on the theory used for three-dimensional bodies. For this purpose the spectral decomposition of the compliance tensor S for a trans versely isotropic body was used and its characteristic values were found in the principal strength space of the material. Then energy orthogonal states of stress were calculated and the corresponding energy components were shown to be separable in discrete entities.
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