Speckle Photography For Strain Measurement - A Critical Assessment

E. Archbold; A. E. Ennos; M. S. Virdee

doi:10.1117/12.956169

18 April 1978 Speckle Photography For Strain Measurement - A Critical Assessment

E. Archbold, A. E. Ennos, M. S. Virdee

Proceedings Volume 0136, 1st European Conf on Optics Applied to Metrology; (1978) https://doi.org/10.1117/12.956169
Event: First European Conference on Optics Applied to Metrology, 1977, Strasbourg, France

Abstract

Speckle photography is a simple technique for measuring displacement in the plane of a surface, so allowing the strain field to be evaluated in two dimensions. A direct experimental comparison of speckle photography with photoelasticity and with finite element analysis on a notched tensile test specimen showed that serious errors could, however, occur due to local surface tilting and to aberrations of the imaging lens. Methods of minimising these effects and those of the speckle decorrelation that can also take place, are discussed.

Citation Download Citation

E. Archbold, A. E. Ennos, and M. S. Virdee "Speckle Photography For Strain Measurement - A Critical Assessment", Proc. SPIE 0136, 1st European Conf on Optics Applied to Metrology, (18 April 1978); https://doi.org/10.1117/12.956169

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