Monday  |  Salon 12  |  10:20 AM–11:00 AM

#16017, Basics of Digital Image Correlation (DIC)

Digital Image Correlation (DIC) is a widely used, optical diagnostic that provides full-field measurements of kinematic quantities-of-interest, such as specimen shape, displacement, velocity, strain, strain-rate, etc. The basic process of DIC is to image a high-contrast pattern – either the natural texture of the specimen or a pattern applied to a specimen – while the specimen is loaded and deformed. The principle of optical flow or conservation of intensity is employed to track the pattern through the image series. DIC is both length- and time-scale independent: As long as the specimen can be imaged during deformation, DIC can be performed. As such, DIC has been used from the micro-scale to structures 10s of meters large, and from quasi-static tests to dynamic events requiring >5 MHz imaging rates. Since its inception in the 1980s, DIC has matured, and is used in a huge variety of applications across the experimental mechanics community.

In this talk, we will provide a high-level overview of the basics of DIC, focusing on both experimental factors to consider in order to capture high-quality images, as well as analysis parameters when performing the image correlation. This talk will be rooted in the Good Practices Guide for DIC developed by the International DIC Society (DOI: 10.32720/idics/gpg.ed1).

SNL is managed and operated by NTESS under DOE NNSA contract DE-NA0003525.

Elizabeth Jones   Sandia National Laboratories
Amanda Jones   Sandia National Laboratories