Accession Number : ADA085145


Title :   Surface Displacement Measurements, Strain and Vibrational Analysis using Speckle Metrology Techniques.


Descriptive Note : Master's thesis,


Corporate Author : NAVAL POSTGRADUATE SCHOOL MONTEREY CA


Personal Author(s) : Lerchbacker,Alan Bernard


Full Text : http://www.dtic.mil/dtic/tr/fulltext/u2/a085145.pdf


Report Date : Mar 1980


Pagination or Media Count : 154


Abstract : Double-exposure specklegrams were made of aluminum 2024-T4 rectangular plates. The double-exposure speckle technique was applied to the aluminum plate to measure in-plane translation and rotation and out-of-plane tilt. Strain and vibrational analyses were also conducted. The vibrational results were compared with results previously obtained using double-exposure time average holography to ascertain their applicability to Naval Engineering. Background in Fourier transforms, wave theory, Fraunhofer diffraction theory, and other areas of physical optics were investigated to enhance the development of speckle metrology techniques. Results of the experiments indicate that speckle metrology, used in conjunction with holography, has significant potential for Naval Engineering applications. Further research is required to develop these techniques. These procedures currently are being utilized extensively in the aerospace industry and automotive research and development areas. (Author)


Descriptors :   *OPTICAL DETECTION , *STRAIN(MECHANICS) , FOURIER TRANSFORMATION , VIBRATION , STRESS ANALYSIS , ALUMINUM ALLOYS , THESES , INTERFEROMETRY , PLATES , MARINE ENGINEERING , APERTURES , METROLOGY , HOLOGRAMS


Subject Categories : Optical Detection and Detectors
      Mechanics


Distribution Statement : APPROVED FOR PUBLIC RELEASE