Acoustic Emission Waveforms in a Half Space.

Abstract

A generalized theory of acoustic emission (AE) is developed on the basis of the theory of elastodynamics and dislocation models. Acoustic emission sources are represented as dislocation sources and include both discontinuities of displacement components and tractions. As AE waves are observed at a stress free surface, Green's functions in a half space are obtained. Fortran programs for computing these functions for non-Cauchy solids are used to calculate AE waveforms from a point crack and moving cracks. Their implication on current attempts of determining source characteristics via deconvolution is discussed. (Author)

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Document Details

Document Type
Technical Report
Publication Date
Sep 01, 1984
Accession Number
ADA146322

Entities

People

  • K. Ono
  • M. Ohtsu

Organizations

  • University of California, Los Angeles

Tags

DTIC Thesaurus Topics

  • Acoustic Emissions
  • Convolution Integrals
  • Discontinuities
  • Emission
  • Engineering
  • Frequency
  • Frequency Domain
  • Integral Transforms
  • Integrals
  • Inverse Problems
  • Materials
  • Materials Science
  • Observation
  • Step Functions
  • Transducers
  • Waves

Readers

  • Structural Health Monitoring of Composite Structures.
  • Wave Propagation and Nonlinear Chaotic Dynamics.

Technology Areas

  • Space