Diffuse Waves for Materials NDE

  • R. L. Weaver

Abstract

Diffuse Field Analysis (DFA) applies the concepts of statistical room acoustics to the study of diffuse, short wavelength, reverberant ultrasound in solids. Multiply reflected and/or scattered ultrasound has lost all phase information (the coherent part can be said to have fully attenuated) but retains some information in its spectral energy density. DFA studies this spectral energy as it evolves in time and space and deduces information on the source which emitted the ultrasound and on the medium in which it reverberates. There are three major applications which have so far shown promise. These are acoustic emission source characterization, material characterization by internal friction, and microstructure characterization by incoherent transport.

This paper reviews the promise and limitations of Diffuse Field Analysis for the NDE of materials, and in particular, discusses possible applications towards the better understanding of acousto-ultrasonics.

Keywords

Lamb Wave Shear Wave Speed Diffuse Wave Spectral Energy Density Statistical Energy Analysis 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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Copyright information

© Springer Science+Business Media New York 1988

Authors and Affiliations

  • R. L. Weaver
    • 1
  1. 1.Dept. of Theoretical and Applied MechanicsUniversity of IllinoisUrbanaUSA

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