Composite materials have a wide range of functional properties, which is ensured by using various technological methods of obtaining both the matrix or fillers and the composition as a whole. A special place belongs to the composition formation technology, which ensures the necessary structure and properties of the composite. In this work, a computer simulation was carried out to identify the main dependencies of the behavior of composite materials in the process of the main technological operations of their production: pressing and subsequent sintering. A polymer matrix randomly reinforced with two types of fillers: spherical and short cylindrical inclusions, was used to construct the finite element models of the structure of composites. The ANSYS Workbench package was used as a calculation simulation platform. The true stress-strain curves for tension, Poisson's ratios, and ultimate stresses for composite materials were obtained using the finite element method based on the micromechanical approach at the first stage. These values were calculated based on the stretching diagrams of the matrix and fillers and the condition of the ideality of their joint operation. At the second stage, the processes of mechanical pressing of composite materials were modelled based on their elastic-plastic characteristics from the first stage. The result is an assessment of the accumulation of residual strains at the stage before sintering. The degree of increase in total strain capability of composite materials after sintering was shown.

Academic and Research Institute of Business Economics and Management Sumy State University 2 Rymskogo Korsakova St 40007 Sumy Ukraine

Department of Applied Materials Science and Technology of Constructional Materials Sumy State University 2 Rymskogo Korsakova St 40007 Sumy Ukraine

Department of Computational Mechanics named after Volodymyr Martsynkovskyy Sumy State University 2 Rymskogo Korsakova St 40007 Sumy Ukraine

Faculty of Industrial Technologies in Púchov Alexander Dubček University of Trenčín 1 Krasku 491 30 02001 Púchov Slovakia

Faculty of Mechanical Engineering J E Purkyně University in Ustí nad Labem Pasteurova 1 400 96 Ustí nad Labem Czech Republic

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