Application of fractal analysis methods in the study of deformation mechanisms and composite building materials fracture

Approach for the study of tensile deformation mechanism of composite materials based on the fractal analysis use of the curves "σ-ε" is proposed in the paper. The methods for calculating fractality index using the method of the minimum coverage, its changes depend on the load duration; allow to quantitatively determining stress and strain levels corresponding to the moments of micro and macro defects formation in samples. Samples of epoxy composites produced on the basis of the modified resin, Etal-247 cured with Etal-45M, were applied for confirmation of possibility to provide quantitative determination of the "critical" points on tensile deformation curves of the polymers. (paper)