Surface Waves for Monitoring of Materials at Different Scales

Dear Colleagues,

Elastic waves are commonly applied in a non-destructive methodology to evaluate mechanical properties, damage states, and material condition. Features related to the propagation of elastic waves show high sensitivity to material condition, either in the form of wave velocities and attenuation or more delicate features such as non-linearity and dispersion. More specifically, surface waves possess the advantage of limited geometric spreading, and are therefore suitable for a large number of applications where the surface properties and condition of materials are of interest. Applications vary from acoustic microscopy for detailed mapping of the material surface and subsurface on the micro-scale (nm to µm) to crack detection in metal components or concrete on the intermediate scale (mm to cm). They are also widely applied at the macro-scale (m), for example for soil characterization, vibration control, or assessing infrastructure. While surface waves may be used in all cases, data processing and analysis may differ significantly depending on the length scale.

This Special Issue of Applied Sciences on “Surface Waves for Monitoring of Materials at Different Scales” intends to explore new trends for the application of surface waves at different length scales, welcoming high-quality papers on the following basic topics:

• The use of surface waves for the monitoring of innovative materials
• New data processing and analysis methodologies
• Innovative experimental applications of Rayleigh waves
• Theoretical and numerical studies of wave propagation
• Characterization of mechanical properties and stiffness
• Polarization of surface waves
• Non-linear Rayleigh waves
• Characterization of distributed heterogeneity and layered media
• Advances in scanning acoustic microscopy
• Advances in soil characterization

Prof. Theodore E. Matikas
Prof. Dimitrios G. Aggelis
Guest Editor

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