Numerical results are presented for the dispersion spectrum for harmonic wave propagation in an unbounded, periodically layered elastic body in a state of plane strain. Both real and complex branches are considered. The spectrum is shown to be multiple-valued and quite intricate in detail. Some analytical properties of the Floquet surface are also discussed.
Harmonic Wave Propagation in a Periodically Layered, Infinite Elastic Body: Plane Strain, Numerical Results
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Delph, T. J., Herrmann, G., and Kaul, R. K. (September 1, 1980). "Harmonic Wave Propagation in a Periodically Layered, Infinite Elastic Body: Plane Strain, Numerical Results." ASME. J. Appl. Mech. September 1980; 47(3): 531–537. https://doi.org/10.1115/1.3153727
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