HOLOGRAPHIC NONDESTRUCTIVE TESTING (HNDT)

TIRES, SANDWICH STRUCTURES, DISK BRAKES AND NUMEROUS OTHER ARTICLES USED IN TRANSPORTATION CAN NOW BE TESTED NONDESTRUCTIVELY WITH IMPROVED SPEED, ACCURACY AND RELIABILITY. KEY TO THIS VERSATILE NEW METHOD IS HOLOGRAPHIC INTERFEROMETRY, WHICH USES COHERENT LIGHT TO RECORD AND RECONSTRUCT THREE-DIMENSIONAL IMAGES. MINUTE SUBSURFACE ANOMALIES ARE CAUSED BY HEAT, PRESSURE, VACUUM, VIBRATION OR OTHER STRESSES (WELL BELOW THE ELASTIC LIMIT) TO PRODUCE CORRESPONDING MINUTE DEFORMATIONS OF THE TEST-OBJECT SURFACE, WHERE INTERFERENCE-FRINGE ANOMALIES ARE FORMED, AND DRAMATICALLY INDICATE THE POSITIONS, SHAPES AND SIZES OF THE HIDDEN FLAWS. /AUTHOR/

• Availability:
  • Find a library where document is available. Order URL: http://worldcat.org/issn/00255327
• Supplemental Notes:
  • Vol 27, No 4, PP 79-84
• Authors:
  • Grant, R M
  • BROWN, G M
• Publication Date: 1969-4

Media Info

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

Subject/Index Terms

• TRT Terms: Accuracy; Brakes; Holography; Imagery; Interferometers; Light; Mathematical models; Nondestructive tests; Reliability; Sandwich construction; Tires
• Old TRIS Terms: Disks; Images
• Subject Areas: Geotechnology; Highways; Materials; Vehicles and Equipment;

Filing Info

• Accession Number: 00216831
• Record Type: Publication
• Files: TRIS
• Created Date: Jun 2 1994 12:00AM