Accession Number:

AD0687414

Title:

OPTICAL DIFFRACTION TECHNIQUES FOR STRAIN MEASUREMENT.

Descriptive Note:

Technical rept.,

Corporate Author:

NORTH CAROLINA STATE UNIV RALEIGH

Report Date:

1969-04-01

Pagination or Media Count:

36.0

Abstract:

New techniques are developed that extend the use of the diffraction grating strain gage to the measurement of axial strains when diffraction angle changes are large and that permit these integral gages to be used for measuring the circumferential strains produced by axial impact of cylindrical rods. Diffraction-strain equations are derived for several different optical configurations that may be employed in experimental studies. Photographs show typical diffraction patterns obtained for each configuration of laser, grating and film. Author

Subject Categories:

  • Test Facilities, Equipment and Methods
  • Optics
  • Mechanics

Distribution Statement:

APPROVED FOR PUBLIC RELEASE