Issue 53

E. M. Strungar et alii, Frattura ed Integrità Strutturale, 53 (2020) 406-416; DOI: 10.3221/IGF-ESIS.53.31 414 Figure 12: Evolution of longitudinal strain fields during a fissure growth for a fiberglass samples. Figure 13: Evolution of longitudinal strain fields during a fissure growth for a fiberglass samples. C ONCLUSIONS herefore, the paper analyzes numerical algorithms for processing the experimental data using the digital image correlation method. The authors suggested recommendations on selection of calculation parameters for analysis of non-homogeneous displacement and strain fields in composite products taking into account the structural non- homogeneity of materials. They have shown the correlation between the selected parameters of the correlation analysis and the scaled level of the consideration of strain processes. Since there is a correlation between the selected processing parameters and the characteristic size of the strain averaging region, the selection of building the vector fields predetermines the possibility of identifying the features of strain localization at various scales. The authors conducted experimental studies of the mechanical behavior of fiber-laminated composite materials in the vicinity of stress concentrators under quasistatic loading. The results of assessment of the effect of the hole size in relation to the characteristic size of the composite material structure on the processes of inelastic deformation and breakage have been obtained. The data confirming the presence of a scale effect of strength in a certain range of values of material structural heterogeneity parameter have been obtained. T