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A Numerical Method for Predicting Rayleigh Surface Wave Velocity in Anisotropic Crystals (Postprint)

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Journal Article - Open Access

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AFRL Materials and Manufacturing Directorate Wright Patterson Air Force Base United States

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A numerical method was developed for calculating the Rayleigh Surface Wave RSW velocity in arbitrarily oriented single crystals in 360 degrees of propagation. This method relies on the results from modern analysis of RSW behavior with the Stroh formalism to restrict the domain in which to search for velocities by rst calculating the limiting velocity. This extension of existing numerical methods also leads to a natural way of determining both the existence of the RSW as well as the possibility of encountering a pseudo-surface wave. Furthermore, the algorithm is applied to the calculation of elastic properties from measurement of the surface wave velocity in multiple different directions on a single crystal sample. The algorithm was tested with crystal symmetries and single crystal elastic moduli from literature. It was found to be very robust and ecient in calculating RSW velocity curves in all cases.

Subject Categories:

  • Radiofrequency Wave Propagation

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