Alexander V. Kazantsev

Perm State Technical University · Department of Applied Mathematics

The text includes the fundamentals of the theory and practice of automatic control, dynamic systems, optimization of systems and identification. Examples are analyzed for the continuous systems that can be disassembled into their constituent objects of the SISO type (single input - single output), except one of the examples for OpenModelica, which...

A numerical model of the formation of a stress-strain state in a prismatic beam during its unilateral processing by plastic strains is developed. Such a model is required to select rational modes of layer-by-layer pressure treatment of additively accreted linear metal segments. Shape distortions, residual stresses and strength characteristics can b...

Porosity, which occurs in products made of aluminum-magnesium alloys synthesized by wire-arc surfacing, significantly worsens the characteristics of fatigue strength. The developed technology of hybrid additive manufacturing with layer-by-layer forging of each deposited layer of material is able to minimize the porosity of the product. To select th...

Изучаются закономерности протекания статической рекристаллизации при наплавке слоя металла на грань призматического образца, предварительно обработанную пластическим деформированием. Данная задача представляет интерес для выбора рациональных параметров процесса гибридного аддитивного производства легких и прочных линейных элементов сегментированных...

The multi-stage technological process of cold stamping of a thin-walled vessel made of sheet steel was evaluated taking into account technological heredity. The quality of the product is evaluated by the distance of its deformed state from the limit states on the strain diagram. To calculate the process, the model of large plastic deformations of t...

Выполнена оценка многоэтапного процесса холодной штамповки тонкостенного стального сосуда с учётом технологической наследственности. Качество изделия связывается с остаточным ресурсом пластичности, то есть с удалённостью его деформированного состояния от кривой предельных деформаций. Для расчёта процесса используется модель больших пластических деф...

The method of construction and attestation of a numerical model of cold stamping of thin-walled products made of anisotropic metal sheet for the design of technological operations is proposed. The relations of the associated law of plastic flow with the Barlat flow function and isotropic strain hardening are used. The method of design and processin...

A.V. Kazantsev, V.I. Kychkin, I.A. Esipenko Search of mechanical properties of the road bed layers witha vibrating response of aroad bed pavement A spectrum characteristics verification of a layered road bed was considered. Spectrum plots were received from field experiments. A dynamic response of the road bed model was evaluated with finite eleme...

A spectrum characteristics verification of a layered road bed was considered. Spectrum plots were received from field experiments. A dynamic response of the road bed model was evaluated with finite element method. A numerical procedure of the Nelder-Mead search method was build for solving an optimization problem about searching the layers mechanic...

Science research student work LS-Dyna Basics v1.1 2017-2018 (in Russian), an author Kazantsev A.V., Perm State Research Polytechnical University, Russia. This is a short concentrated help about keywords,forming limit diagram (FLD) and user materials

Methods of theoretical analysis and experimental verification of conditions of limit deformation are considered for a reasonable choice of the constitutive equations for mathematical modeling of processes of hot and warm treatment by pressure of sheet metal products with a deep drawing. Attention is focused on the forming limit curve of sheet metal...

The main goal of the research was to find modal charachteristics of powered engine's rotor. In the work was build selfmade FEM-software for analysing transient response of the structure. Also the selfmade FEM-procedures were checked with well known analytical solutions and with commercial FEM-software.