Digital Image Correlation Techniques for Aerospace Applications

This paper discusses the history, current state-of-the-art, theory, and application of digital image correlation (DIC) techniques in various aerospace applications. First, the history of DIC followed by the current state-of-the-art of DIC techniques are presented. Second, brief working principle of DIC is presented. After that, several examples of DIC technique for different aerospace applications are presented. Some of the examples include strain measurement in friction stir weld (FSW) samples, measurement of high strain regions in particulate composites, Poisson’s ratio measurement in spray on foam insulation (SOFI) samples, measurement of strain and deformations in NASA’s massive large rocket test section, full-field strain evaluation in helicopter drone composite rotor blade, and measurement of strains in shear panels of an aircraft. Finally, this paper also discusses on-going effort for measuring the in-plane bulk displacement and deformation in composites and adhesive joints by using hybrid NDE DIC techniques.

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