1 June 1982 Digital Imaging Techniques In Experimental Stress Analysis
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Optical Engineering, 21(3), 213427 (1982). doi:10.1117/12.7972925
Digital imaging techniques are utilized as a measure of surface displacement components in laser speckle metrology. An image scanner which is interfaced to a computer records and stores in memory the laser speckle patterns of an object in a reference and deformed configuration. Subsets of the deformed images are numerically correlated with the references as a measure of surface displacements. Discrete values are determined around a closed contour for plane problems which then become input into a boundary integral equation method in order to calculate surface traction in the contour. Stresses are then calculated within this boundary. The solution procedure is illustrated by a numerical example of a case of uniform tension.
W. H. Peters, W. F. Ranson, "Digital Imaging Techniques In Experimental Stress Analysis," Optical Engineering 21(3), 213427 (1 June 1982). https://doi.org/10.1117/12.7972925

Digital imaging

Stress analysis

3D scanning

Laser metrology

Laser scanners

Speckle metrology

Speckle pattern

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