SCATTERING FROM SURFACE-BREAKING AND NEAR-SURFACE CRACKS.

J. D. Achenbach*, Y. C. Angel, W. Lin

*Corresponding author for this work

Research output: Contribution to journalConference articlepeer-review

9 Scopus citations

Abstract

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 languageEnglish (US)
Pages (from-to)93-109
Number of pages17
JournalAmerican Society of Mechanical Engineers, Applied Mechanics Division, AMD
Volume62
StatePublished - Dec 1 1984

ASJC Scopus subject areas

  • Mechanical Engineering

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