Accession Number : ADA181665

Title :   Shearographic Imaging System.

Descriptive Note : Final rept. 16 Oct 84-16 Dec 86,

Corporate Author : UNIVERSITY COLL OF NORTH WALES BANGOR SCHOOL OF ELECTRONIC ENGINEERING SCIENCE

Personal Author(s) : Das-Gupta,D K

PDF Url : ADA181665

Report Date : 01 Jun 1987

Pagination or Media Count : 33

Abstract : An optical shearing technique has been used to produce high quality strain contours of centrally loaded, or thermally stressed and clamped plates. An analysis of strain from these fringes provides good agreement between experimental and theoretical values. It has also been shown that this technique is compatible with infrared thermographs in the detection of delamination in a composite laminated plate. The above work was followed by developing an 'on line' electronic speckle shearing technique in which the optical camera was replaced with electronic camera and its associated data storage and analysis and display system. This latter method shows good promise. However, it requires further work and equipments for better image process facilities to improve the fringe resolutions. (Author)

Descriptors :   *ELECTRONIC EQUIPMENT, *IMAGES, *OPTICAL EQUIPMENT, COMPOSITE STRUCTURES, DATA STORAGE SYSTEMS, DISPLAY SYSTEMS, CAMERAS, COMPOSITE MATERIALS, FACILITIES, HEAT, INFRARED RADIATION, LAMINATES, PLATES, STRESSES, THERMOGRAPHS

Subject Categories : Optics

Distribution Statement : APPROVED FOR PUBLIC RELEASE