Digital Imaging Techniques In Experimental Stress Analysis

W. H. Peters; W. F. Ranson

doi:10.1117/12.7972925

1 June 1982 Digital Imaging Techniques In Experimental Stress Analysis

W. H. Peters, W. F. Ranson

Author Affiliations +

Optical Engineering, Vol. 21, Issue 3, 213427 (June 1982). https://doi.org/10.1117/12.7972925

Abstract

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.

Citation Download Citation

W. H. Peters and 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

Published: 1 June 1982

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