Abstract
This chapter provides an introduction to the methods for measuring the field of displacement and strain on the surface of a specimen by means of digital image correlation (DIC) techniques. Both its two-dimensional and three-dimensional versions are presented. A simplified overview of the algorithms underlying such a method is provided. As DIC can lead to subtle errors, which may go unobserved, the focus of this section is on the several possible sources of random and systematic errors, and on possible approaches and practical solutions to keep such errors under control. The methods for preparing the specimen’s surface are described in detail. An extensive discussion is provided about the strategies for optimizing the processing parameters and the post-processing filters in order to minimize the noise while avoiding significant loss of information. The last part of this chapter provides an overview of the volumetric version of such a method (digital volume correlation, DVC), and some applications.
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Cristofolini, L. (2015). Overview of Digital Image Correlation. In: Experimental Stress Analysis for Materials and Structures. Springer Series in Solid and Structural Mechanics, vol 4. Springer, Cham. https://doi.org/10.1007/978-3-319-06086-6_5
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DOI: https://doi.org/10.1007/978-3-319-06086-6_5
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