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Title: Determination of the plastic zone by laser-speckle correlation
Authors: Dai, Y.Z.
Tay, C.J. 
Chiang, F.P.
Issue Date: Dec-1991
Citation: Dai, Y.Z., Tay, C.J., Chiang, F.P. (1991-12). Determination of the plastic zone by laser-speckle correlation. Experimental Mechanics 31 (4) : 348-352. ScholarBank@NUS Repository.
Abstract: Laser-speckle-pattern correlation is used for the determination of elastic-plastic boundary on the surface of well polished metal specimens. The method employs a converging laser beam to illuminate the test object. Diffracted verging laser beam to illuminate the test object. Diffracted images are recorded and processed on a computer-based vision system. Subsequent image-correlation analysis yields information on the surface deformation of the test objects. The technique is applied to a flat tensile specimen with two circular notches at the central portion. Measured plastic zone is compared with results obtained by the finite-element method. © 1991 Society for Experimental Mechanics, Inc.
Source Title: Experimental Mechanics
ISSN: 00144851
DOI: 10.1007/BF02325992
Appears in Collections:Staff Publications

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