Coupled Elastic Surface Wave in Curved Structures
Abstract
A mathematical description of coupled. surface-wave propagation in elastic waveguides whose properties change slowly in the lateral or transverse directions has been constructed. This construction includes curved waveguides (shells) whose radius of curvature is large with respect to thickness. The work was undertaken to explore a nondestructive way to interrogate an inaccessible side of a structure by launching a surface wave on the other accessible side. For flat waveguides (plates) whose thickness varies slowly in the propagation direction the surface waves couple very efficiently provided the thickness is on the order of a wavelength, but as the waveguide grows in thickness the coupling is quickly lost. The coupling in a curved waveguide occurs provided the ratio thickness to radius of curvature is of the order of 1/20 and the thickness is on the order of a wavelength.
Document Details
- Document Type
- Technical Report
- Publication Date
- Feb 11, 2000
- Accession Number
- ADA374339
Entities
People
- John G. Harris
Organizations
- University of Illinois Urbana–Champaign