GENERAL OPTICAL DIFFRACTION-STRAIN RELATIONS
Abstract
General diffraction-strain equations are developed for the optical diffraction grating strain gages now coming into use in connection with experimental studies of wave propagation in solids. Equations are derived for the following cases: superimposed gratings crossed at any angle and subjected to arbitrary surface strains; orthogonal gratings subjected to arbitrary rotations; and orthogonal gratings aligned with principal strain directions and subjected to arbitrary rotations during the strain. The inherent strain resolution capability of an optical diffraction system is discussed and the differences between this technique for strain measurement and that of x-ray stress analysis are described.
Document Details
- Document Type
- Technical Report
- Publication Date
- Mar 01, 1969
- Accession Number
- AD0685244
Entities
People
- H. H. Stadelmaier
- H. W. Blake
- R. A. Douglas
Organizations
- North Carolina State University