caa a22 4500 397499809 CHVBK 20180308164530.0 cr unu---uuuuu 161202e199502 xx s 000 0 eng 10.1093/qjmam/48.1.77 doi (NATIONALLICENCE)oxford-10.1093/qjmam/48.1.77 ROMEO MAURIZIO D.I.B.E. Università, via Opera Pia, 11a-16145 Genova, Italy SPECIFIC DIRECTIONS IN VISCOELASTIC CRYSTALS [Elektronische Daten] [MAURIZIO ROMEO] The concepts of specific directions and specific axes in elastic crystals are extended to viscoelastic crystals accounting for the inhomogeneous character of wave propagation. Material symmetry is investigated by exploiting the properties of the six-dimensional viscoelastic tensor. Specific directions and axes are found to be normal to planes of material symmetry and the bivectors of the corresponding purely transverse or longitudinal waves are obtained as functions of a real parameter. The present analysis enables us to give a generalization and an alternative proof of a theorem due to Cowin in the case of homogeneous waves in elastic crystals. © Oxford University Press Articles nationallicence The Quarterly Journal of Mechanics and Applied Mathematics Oxford University Press 48/1(1995-02), 77-87 0033-5614 48:1<77 1995 48 qjmamj https://doi.org/10.1093/qjmam/48.1.77 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1093/qjmam/48.1.77 text/html Onlinezugriff via DOI NATIONALLICENCE 100 1- ROMEO MAURIZIO D.I.B.E. Università, via Opera Pia, 11a-16145 Genova, Italy NATIONALLICENCE 773 0- The Quarterly Journal of Mechanics and Applied Mathematics Oxford University Press 48/1(1995-02), 77-87 0033-5614 48:1<77 1995 48 qjmamj Metadata rights reserved CC BY-NC-4.0 http://creativecommons.org/licenses/by-nc/4.0 nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-oxford