From an analysis of the above results for ζ=1 we can conclude the following:
The initial stresses have a substantial effect on the phase velocities of the generated waves.
There are frequencies at which the relative phase velocity is independent of the initial stresses.
Each mode has a frequency range in which the variation of the phase velocity caused by the initial stresses is strongly dependent on the frequency.
As the ratio of layer thicknesses varies, there is also a variation both in the critical frequencies and in the nature of the dependence of the phase velocity on the frequency and on the initial stresses.
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Guz', A.N., Sitenok, N.A. & Zhuk, A.P. Axially symmetric elastic waves in a laminated compressible composite material with initial stresses. Soviet Applied Mechanics 20, 589–596 (1984). https://doi.org/10.1007/BF00891714
- Layer Thickness
- Composite Material
- Phase Velocity
- Relative Phase
- Elastic Wave