Accession Number:

ADA148375

Title:

Research on Nondestructive Testing.

Descriptive Note:

Final rept. 11 Sep 79-31 Mar 84,

Corporate Author:

STANFORD UNIV CA EDWARD L GINZTON LAB OF PHYSICS

Personal Author(s):

Report Date:

1984-03-01

Pagination or Media Count:

95.0

Abstract:

A program of research on nondestructive testing is described. A new type of synthetic-aperture real-time electronically-scanned imaging system was developed for the observation and sizing of cracks in metal structures. A new type of acoustic microscope was developed for accurately measuring the depth and width of surface features, and for quantitative measurements of materials properties. A new theory and experimental techniques were developed for measuring attenuation and phase velocity, and for the prediction of attenuation and phase velocity in granular materials this makes it possible to measure the microstructure. For the first time, acoustoelastic measurements of stress in plastically deformed regions were carried out and correlated with theory. New theoretical techniques were developed for prediction of the stress intensity factors and energy associated with cracks and inclusions. Author

Subject Categories:

  • Test Facilities, Equipment and Methods
  • Acoustic Detection and Detectors
  • Mechanics

Distribution Statement:

APPROVED FOR PUBLIC RELEASE