Accession Number : ADA186330

Title :   A Composite Grating for Moire Interferometry.

Descriptive Note : Technical rept.,

Corporate Author : WASHINGTON UNIV SEATTLE DEPT OF MECHANICAL ENGINEERING

Personal Author(s) : Wang, F X ; Kang, B S ; Kobayashi, A S

PDF Url : ADA186330

Report Date : Jul 1987

Pagination or Media Count : 24

Abstract : The theoretical background and the experimental verification of a new composite grating with two different grating densities, which was developed for simultaneous small and large displacement measurements fo a single specimen using moire interferometry, are presented in this paper. A composite grating with line densities of 1200 and 300 lines/mm is then used to study the changes in the displacement field and the approximate J-integral values of a 5052-H32 aluminum, single edge notched (SEN) specimen under increasing load.

Descriptors :   *GRATINGS(SPECTRA), *INTERFEROMETRY, *MOIRE EFFECTS, DENSITY, DISPLACEMENT, EDGES, J INTEGRALS, MEASUREMENT, ALUMINUM ALLOYS, COMPOSITE STRUCTURES

Subject Categories : Optics

Distribution Statement : APPROVED FOR PUBLIC RELEASE