Experimental and Theoretical Study of Rayleigh-Lamb Waves in a Plate Containing a Surface-Breaking Crack

Abstract

Scattering of Rayleigh-Lamb waves by a normal surface-breaking crack in a plate has been studied both theoretically and experimentally. The two- dimensionally of the far field, generated by a ball impact source, is exploited to characterize the source function using a direct integration technique. The scattering of waves generated by this impact source by the crack is subsequently solved by employing a Green's function integral expression for the scattered field coupled with a finite element representation of the near field. It is shown that theoretical results of plate response, both in frequency and time, are similar to those obtained experimentally. Additionally, implications for practical applications are discussed. (JHD)

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Document Details

Document Type
Technical Report
Publication Date
Jan 01, 1990
Accession Number
ADA225135

Entities

People

  • Greg S. Jewett
  • Jon W. Fox
  • Joseph Paffenholz
  • Subhendu K. Datta
  • Xiaobai Gu

Organizations

  • University of Colorado Boulder

Tags

Communities of Interest

  • Advanced Electronics
  • Air Platforms
  • Sensors

DTIC Thesaurus Topics

  • Acoustic Emissions
  • Ball Bearings
  • Elastic Waves
  • Engineering
  • Far Field
  • Frequency
  • Frequency Response
  • Integrals
  • Mechanical Engineering
  • Near Field
  • Research Facilities
  • Scattering
  • Surface Properties
  • Time Signals
  • Two Dimensional
  • Wave Propagation
  • Waves

Fields of Study

  • Physics

Readers

  • Materials Science (Mechanical Engineering).
  • Wave Propagation and Nonlinear Chaotic Dynamics.