Experimental validation of fractional fringe moire interferometry
Abstract
Fractional fringe moire interferometry is experimentally validated with tests using simple linear-elastic specimens subjected to simple stresses. The specimens are beams of rectangular cross section under three-point bending, and some of them have semicircular recesses opposite the central loading point. The deformations along selected lines are calculated using fractional fringe analysis and compared to the deformations calculated using simple fringe counting. The resulting deformation ratios for the two types of specimens are within 3 percent error of the recorded load ratio. It is suggested that fractional fringe analysis is a simple and accurate approach which can be relied on when determining deformations from moire fields.
- Publication:
-
1989 SEM Spring Conference on Experimental Mechanics
- Pub Date:
- 1989
- Bibcode:
- 1989sem..conf..401B
- Keywords:
-
- Elastic Bodies;
- Elastic Deformation;
- Loading Rate;
- Moire Interferometry;
- Rectangular Beams;
- Cross Sections;
- Gratings (Spectra);
- Wave Fronts;
- Instrumentation and Photography