Measurement of Deformation by Means of Correlation of Speckle Fields
First Online: 22 August 2006 Received: 15 November 2005 Accepted: 14 June 2006 DOI:
Cite this article as: Horváth, P., Šmíd, P., Hrabovský, M. et al. Exp Mech (2006) 46: 713. doi:10.1007/s11340-006-9476-8 Abstract
The paper includes the description of non-contact measurement of object deformation by means of correlation of speckle fields. This optical method uses statistical properties of speckle patterns for the detection of the components of the small deformation tensor of an elementary area of a surface of an object under investigation. The theoretical background of this method is briefly described and important equations are mentioned. Suitable experimental set-ups for measurement of specific elongation
ɛ are introduced and their advantages are discussed. Concrete example of measurement, where the investigated object is a specimen of rubber commonly used in tire making industry, is presented including achieved results. xx Keywords Speckle Speckle correlation Specific elongation Non-contact measurement References
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