ACOUSTIC EMISSION MONITORING SYSTEM FOR DETECTION OF CRACKS IN A COMPLEX STRUCTURE

AN ACOUSTIC EMISSION MONITORING SYSTEM DESIGNED TO DETECT, IN REAL TIME, INITIATION AND GROWTH OF CRACKS IN A COMPLEX STRUCTURE DURIING STATIC AS WELL AS FATIGUE TESTING HAS BEEN DEVELOPED. THE SYSTEM CONSISTS OF ARRAYS OF ACOUSTIC SENSORS, LOGIC CIRCUITS AND OUTPUT DEVICES. AN EFFECTIVE SPATIAL- AND FREQUENCY-FILTER COMBINATION PERMITS THE USE OF THE SYSTEM IN THE PRESENCE OF THE HEAVY BACKGROUND NOISE ORDINARILY ENCOUNTERED IN THE TESTING OF A LARGE, COMPLEX STRUCTURE. THE SYSTEM IS BEING USED SUCCESSFULLY IN STATIC AND FATIGUE TESTING OF FULL-SCALE AS WELL AS SMALL-SCALE SPECIMENS OF AIRCRAFT COMPONENTS AND STRUCTURES. /AUTHOR/

• Availability:
  • Find a library where document is available. Order URL: http://worldcat.org/issn/00255327
• Supplemental Notes:
  • Vol 29, No 1, PP 8-12, 9 FIG, 3 REF
• Authors:
  • Nakamura, Y
• Publication Date: 1971-1

Media Info

• Serial:
  • Materials Evaluation
  • Publisher: American Society for Nondestructive Testing
  • ISSN: 0025-5327

Subject/Index Terms

• TRT Terms: Acoustics; Aircraft; Components; Detection and identification; Detectors; Fatigue tests; Fracture mechanics; Logic circuits; Monitoring; Noise; Pollutants; Sensors; Static tests; Structures; Systems
• Subject Areas: Aviation; Bridges and other structures; Environment; Geotechnology; Highways; Materials; Vehicles and Equipment;

Filing Info

• Accession Number: 00217056
• Record Type: Publication
• Files: TRIS
• Created Date: May 10 1971 12:00AM