USE OF PLATE WAVE ANALYSIS IN ACOUSTIC EMISSION TESTING TO DETECT AND MEASURE CRACK GROWTH IN NOISY ENVIRONMENTS

One of the major problems encountered in using Acoustic Emission (AE) techniques to monitor structures in the field is the difficulty in separating AE signals from crack growth, from signals due to extraneous noise sources. These extraneous noise sources can be created by frictional rubbing, impact of particles on the structure being monitored, and leaks by pressurized components. This report shows how special transducer and instrumentation techniques can be used to recognize the type of wave predominate in a plate to allow filters to be constructed in the instrumentation to not only eliminate extraneous noise sources from the AE data, but also have the potential of measuring the depth of a growing crack in a plate.

• Corporate Authors:

  Technomic Publishing Company, Incorporated

  851 New Holland Avenue, Box 3535
  Lancaster, PA  United States  17604
• Authors:
  • Dunegan, H L
• Conference:
  • Structural Materials Technology. An NDT Conference.
  • Location: San Diego, CA
  • Date: 1996-2-20 to 1996-2-23
• Publication Date: 1996

Language

• English

Media Info

• Features: Figures; References;
• Pagination: p. 335-341

Subject/Index Terms

• TRT Terms: Acoustic emission tests; Cracking; Detection and identification; Detectors; Filters; Measurement; Monitoring; Noise; Nondestructive tests; Structural plates; Structures; Transducers; Urban growth; Waveform analysis
• Uncontrolled Terms: Plate
• Subject Areas: Bridges and other structures; Design; Environment; Highways; I24: Design of Bridges and Retaining Walls;

Filing Info

• Accession Number: 00725900
• Record Type: Publication
• Files: TRIS
• Created Date: Sep 16 1996 12:00AM