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Title:Measurements of Surface Displacements During Stress Wave Propagation in Opaque Solids Using Pulsed Laser Speckle Photography
Author(s):Tafralian, Michael Arthur
Department / Program:Theoretical and Applied Mechanics
Discipline:Theoretical and Applied Mechanics
Degree Granting Institution:University of Illinois at Urbana-Champaign
Subject(s):Applied Mechanics
Abstract:An experimental method to measure in-plane surface displacements in opaque solids has been developed. The system consists of combining a pulsed ruby laser source and an optical speckle photography recording scheme. The set-up is capable of measuring surface displacements due to stress waves and propagating cracks in solids. A double exposure recording allows the comparison of object points to be made between two states of displacement. The final specklegram is processed and treated as a diffraction grating to yield both full-field or point-by-point data concerning object displacements. The advantages of such a system include variable sensitivity recordings, non-contacting, ultra fast and it fills the gap between other experimental methods such as moire and holography. Results using Homalite 100 and Lexan are presented.
Issue Date:1980
Description:66 p.
Thesis (Ph.D.)--University of Illinois at Urbana-Champaign, 1980.
Other Identifier(s):(UMI)AAI8026604
Date Available in IDEALS:2014-12-14
Date Deposited:1980

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