Development of the Digital Image Correlation Method to Study Deformation and Fracture Processes of Structural Materials

Calculation-experimental procedure for determining welding deformations and stresses based on a digital image correlation method

“…In contrast to the modified incremental algorithm proposed in work [11] for determining movements on a series of stereo pairs of images, the algorithm proposed in this work is simpler. By calculating the increments of nodal movements according to the Newtonian iteration method and reducing the number of iterations, the proposed finite-element algorithm provides higher accuracy with lower requirements for the resource of computing equipment.…”

“…It is based on the calculated processing of the optical flow carrying information about the deformation of solids. Its action is based on the calculation of motion vectors and further calculation of deformation components using the numerical differentiation procedure [11]. The main advantages of DIC method are a sufficiently high accuracy associated with the resolution of the digital cameras used, as well as the absence of impact on the measured structure [10,11].…”

“…Its action is based on the calculation of motion vectors and further calculation of deformation components using the numerical differentiation procedure [11]. The main advantages of DIC method are a sufficiently high accuracy associated with the resolution of the digital cameras used, as well as the absence of impact on the measured structure [10,11]. The use of this method is becoming one of the most common approaches to the study of the processes of deformation and destruction of structurally inhomogeneous materials.…”