Paper reviews scattering of surface waves and body waves by cracks that are located at or near the free surface of an elastic body. For two-dimensional configurations, exact formulations and frequency-domain numerical results are presented for a normal surface-breaking crack, and for sub-surface cracks that are oriented under various angles with the free surface. Far-field as well as some near-field amplitude spectra are presented. Some recent results are discussed for the three-dimensional problem of reflection, transmission and scattering of obliquely incident Rayleigh surface waves by an infinitely long surface-breaking crack. An approximation to the scattered field for a surface-breaking crack of a large length to depth ratio is constructed by judicious use of crack-opening displacements for the infinitely long crack in conjunction with an elastodynamic representation integral.
|Original language||English (US)|
|Number of pages||17|
|Journal||American Society of Mechanical Engineers, Applied Mechanics Division, AMD|
|State||Published - Dec 1 1984|
ASJC Scopus subject areas
- Mechanical Engineering