Technology, energy, agriculture transport AIC

Volodymyr Mykhalevych – Doctor of Technical Sciences, Full Professor, Department of Electric Power Engineering, Electrical Engineering and Electromechanics, Vinnitsa National Agrarian University (3 Solnechna St., Vinnitsa, 21008, e-mail: mykhalevych@vntu.edu.ua, https://orcid.org/0000-0003-1557-7331)

Andrii Shtuts – Assistant Professor, Department of Electric Power Engineering, Electrical Engineering and Electromechanics, Vinnitsa National Agrarian University (3, Solnechna str., Vinnitsa, 21008, Ukraine, e-mail: shtuts1989@gmail.com, https://orcid.org/0000-0002-4242-2100).

Kolisnyk Mykola – Assistant Professor, Department of Electric Power Engineering, Electrical Engineering and Electromechanics, Vinnitsa National Agrarian University (3, Solnechna str., Vinnitsa, 21008, Ukraine, e-mail: kolisnik30@gmail.com, https://orcid.org/0000-0001-5502-6556).

This scientific article addresses the pressing issue of material deformation modeling in the context of stamping by wrapping processes (SWP). The main challenges in the development of these processes include the likelihood of workpiece failure due to insufficient material plasticity and unfavorable stress-strain states, determined by technological process parameters. Thus, effective SWP process development requires the utilization of material deformation modeling.
The article indicates that any material deformation model in plastic deformation processes comprises three main elements:
Analytical representation of the curve or surface of boundary plastic deformations during stationary deformation: This element describes how the material's plastic deformation changes during stationary deformation with alterations in the invariant stress state indicators.
Mathematical model of the deformation path in coordinates of stress state indicators - accumulated plastic deformation. This model determines the path along which material deformation develops with changing stress state indicators and is dependent on accumulated plastic deformation.
Damage accumulation model: This element takes into account accumulated damage in the material and can be used to predict workpiece failure.
Specifically, the article analyzes the surface of boundary plastic deformations during stationary cold deformation and employs terminology to describe the dependence of accumulated plastic deformation until failure on invariant stress state indicators. The term "stationary deformation" is used to denote material deformation under unchanged values of these indicators.

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