Acoustic Emission Arising from Plastic Deformation and Fracture.

Abstract

This paper reviews current status of acoustic emission signal detection methods, theoretical analysis of acoustic emission sources and acoustic emission behavior of materials arising from plastic deformation and fracture. Recent developments in quantitative signal detection and transducer characterization are considered. Several theories of acoustic emission sources are summarized and one based on dislocation theory by Malen and Bolin is extended to provide a relation between the inelastic displacement at a source to the peak voltage output of a resonant transducer. Models of acoustic emission from plastic deformation are presented. A new model for continuous acoustic emission is developed on the basis of the modified Malen-Bolin theory. Predictions of the model are discussed in conjunction with recent studies on acoustic emission behavior as a function of test temperature and of heat treatment. Finally, acoustic emission due to cracking is evaluated, especially in relation to amplitude distribution analysis of burst-type emission. (Author)

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Document Details

Document Type
Technical Report
Publication Date
May 01, 1980
Accession Number
ADA086263

Entities

People

  • Kanji Ono

Organizations

  • University of California, Los Angeles

Tags

Communities of Interest

  • Energy and Power Technologies
  • Ground and Sea Platforms
  • Sensors

DTIC Thesaurus Topics

  • Acoustic Emissions
  • Air Gaps
  • Alloys
  • Crack Propagation
  • Crystal Structure
  • Detectors
  • Distribution Functions
  • Geometry
  • Grain Size
  • Materials
  • Measurement
  • Piezoelectric Transducers
  • Solid Solutions
  • Square Roots
  • Tensile Testing
  • Wave Propagation
  • Yield Strength

Readers

  • Acoustical Oceanography.
  • Materials Science (Mechanical Engineering).
  • Theoretical Analysis.