MEASUREMENT ON THE HEIGHT OF INTERNAL DEFECTS USING THE MODECONVERTED SURFACE WAVE AT THE DEFECT

The paper proposes a new method by which the cross sectional size or the diameter of internal defects such as cracks and blow holes can be measured accurately and easily. The method is based on using the time difference between a directly reflected shear wave and the echo resulting from the mode conversion between the shear wave and the surface wave at the defect in angle beam testing. The measuring principle, experimental results and measuring conditions or limitations of the method are discussed.

• Supplemental Notes:
  • 9th World Conference on Non-Destructive Testing, Melbourne, 19-23 November 1979.
• Corporate Authors:

  World Conference on Non-Destructive Testing

  Parkville, Victoria,   Australia 
• Authors:
  • Ogura, Y
  • Ishii, Y
• Publication Date: 1979

Media Info

• Pagination: 12 p.

Subject/Index Terms

• TRT Terms: Cracking; Defects; Measurement; Nondestructive tests; Rayleigh waves; S waves; Structural deterioration and defects; Structures; Welds
• Uncontrolled Terms: Weld defects
• Old TRIS Terms: Crack opening measurement
• Subject Areas: Bridges and other structures; Marine Transportation; Materials;

Filing Info

• Accession Number: 00331631
• Record Type: Publication
• Source Agency: Engineering Index
• Report/Paper Numbers: Paper 4G-5
• Files: TRIS
• Created Date: Jun 12 1981 12:00AM