SCIENTIFIC DEVELOPMENTS OF YOUNG SCIENTISTS TO IMPROVE LIFE

Accurate measurement of material deformations during research is a crucial aspect for determining the stress-strain state of building structures.Therefore, traditional methods of studying structural behavior are increasingly being replaced by advanced methods that employ computerization and automation [1].The science of analytical photometry laid the foundation for the development of digital image correlation (DIC) methods.In the publication by Rosenfeld [2], the development of DIC methods during the 1960s-1970s is described, along with the gradual increase in accuracy and the optimization of the image analysis and matching algorithms.Simultaneously with the improvement of DIC, advances were made in holography, laser spectral photography, and interferometry [3][4][5].The digital image correlation method is an optical method based on the mathematical correlation analysis of digital images of the object under study in various stress-strain states [1].The algorithm of the method includes continuous capturing of images by a digital camera during the loading of structures, capturing surface deformations, and this allows for the assessment of changes in physical time on the surface characteristics of the material.The main principles and approaches to image processing have been thoroughly analyzed and described in a number of sources [6][7][8].Digital image correlation is extremely flexible and versatile in its areas of application, both within construction and beyond.Key applications of the method include research on fatigue stresses and cracks in metal, dynamic testing, accumulation of thermal stresses in materials, and more [9, 10].The market offers many companies that provide software packages for analysis using the image correlation method [8], and in this study, software from VIC-2D (Correlated Solutions Company) will be used [11].The load-bearing capacity of reinforced concrete beams after the restoration of the compressed concrete zone and the impact of the restoration on the stress-strain state of bending elements remain insufficiently researched.Innovative technological methods for data acquisition and fixation during experimental testing using non-destructive methods allow the investigation of the stress-strain state in real-time with high accuracy, one of which is the digital image correlation method.