Rotationally invariant viscoelastic medium with a non-symmetric stiffness matrix

Ludek Klimes


We determine the general form of a rotationally invariant non-symmetric stiffness matrix of a viscoelastic medium. It is described by three additional parameters in comparison with a rotationally invariant symmetric stiffness matrix of a transversely isotropic (uniaxial) viscoelastic medium. As a consequence, we find that the stiffness matrix of an isotropic viscoelastic medium is always symmetric.


Viscoelastic media, stiffness tensor, elastic moduli, transverse isotropy, symmetry axis.

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Seismic Waves in Complex 3-D Structures, 27 (2017), 97-103 (ISSN 2336-3827, online at