Combining GPU-based full-field and strain-controlled 2D-DIC for simplified crack growth experiments

The combination of a 2D digital image correlation (DIC) system based on a graphics processing unit (GPU) with a CoaXPress 2.0 camera acquiring up to 3 GB/s of image data enables a real-time evaluation of both, integral strain for strain-control and full-field DIC on images selected automatically in real-time. This combination enables the use of one single sensor for strain-controlled crack growth and crack characterization. The full-field displacement is compared to a finite-element model (FEM) using the crack contour measured by the DIC system.