Oleksandr Ustynenko

@kpi.kharkov.ua

Head of The Department of Theory and Computer-Aided Design of Mechanisms and Machines
National Technical University «Kharkiv Polytechnic Institute»

Oleksandr Ustynenko


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https://researchid.co/ustin1964

RESEARCH, TEACHING, or OTHER INTERESTS

Mechanical Engineering
11

Scopus Publications

Scopus Publications

  • Modeling a HCR Gear with Variable Thickness of the Thin Hard Coating on the Tooth Surface for Fem Analysis
    Roman Protasov, Ján Danko, Oleksandr Ustynenko, Igor Soprunov, Oleksij Bondarenko, Illia Klochkov, Yevhenii Marchenko
    Strojnicky Casopis Journal of Mechanical Engineering, 2025
    This work presents a computer model of HCR gear wheels with thin hard coatings of variable thickness. The coating thickness fluctuates along tooth depth due to limited technological space, particularly at the dedendum. Experimental studies revealed coating destruction occurs mainly at the tooth dedendum when thickness falls below 2 μm, leading to peeling. The varying stiffness between tooth addendum and dedendum affects coating strength and load-bearing capacity. The model, developed in SolidWorks CAD, accounts for HCR gearing kinematics, contact path geometry, and simultaneous multi-pair tooth engagement.
  • Theoretical Base for Determining the Modulus of Elasticity of Thin Plate Compressed by Concentrated Force
    Andrii Moltasov, Pavlo Tkach, Marianna Dyman, Oleksandr Ustynenko, Juraj Ondruška
    Strojnicky Casopis Journal of Mechanical Engineering, 2025
    An analytical solution to the plane problem in elasticity theory is presented for the case of a concentrated transverse force acting on a thin, sufficiently wide plate. A functional relationship is obtained which allow to determine the displacements of points on the plate located along the line of force application depending on the distance from the point of force application. Using an example, by comparing analytical and numerical calculations of the displacement of a specific point, it is shown that the formula derived from the established relationship provides quite accurate results. The proposed formula is recommended for determining the first-order elastic modulus based on measured force and displacement parameters.
  • Optimal Design of Spur Gears With Increased Contact Ratio
    Oleksandr Ustynenko, Stanislav Cherelev, Juraj Ondruška, Roman Protasov, Vitalii Yepifanov, Oleksiy Bondarenko, Sergij Andrienko
    Strojnicky Casopis Journal of Mechanical Engineering, 2025
    The study is devoted to optimal design of gears with profile contact ratio ε α ≥ 2. Optimality criteria formulated as follows: the contact stresses in the pitch point must take a minimum value when all constraints are met, first, when the profile contact ratio ε α ≥ 2 is ensured. Variables planning are defined. Formed a system of constraints for the variables planning. A LP τ-sequence method for solving the problem of optimal design is chosen. The algorithm for optimal design of gear has been developed.
  • MESHING CHARACTERISTICS OF PROFILE SHIFTED CYLINDRICAL QUASI-INVOLUTE ARC-TOOTH-TRACE GEARS. PART 2. CALCULATION RESULTS
    Pavlo Tkach, Olga Reviakina, Anatolii Kryvosheia, Volodymyr Melnyk, Oleksandr Ustynenko, Roman Protasov
    Strojnicky Casopis Journal of Mechanical Engineering, 2023
    Based on the results obtained in the previous research, the values of meshing characteristics of profile shifted quasi-involute arc-tooth-trace gears is calculated. The influence of the values of profile shift coefficient and the angle of tooth trace on meshing characteristic distribution on the tooth flank surface along tooth trace is defined. The results can be used for design of profile shifted quasi-involute arc-tooth-trace gears, cut by Gleason-type cutters with different profile angle value.
  • EFFECT OF MISALIGNMENT OF AXES IN DOUBLE-SIDED WELD ON STRESSES DISTRIBUTION IN BUTT WELDED JOINTS
    Andrii Moltasov, Pavlo Tkach, Oleksandr Ustynenko, Roman Protasov
    Strojnicky Casopis Journal of Mechanical Engineering, 2023
    An analytical method for calculation of local stresses in double-sided butt welded joints at misalignment of welds’ axes is developed. The method is applicable for welded thin-gauge plates with different geometry of welds on the face and root sides under tensile load. In the given calculation example, it was shown that the stresses reach their maximum value in the zone of transition from the root weld to the base metal which is farther from the axis of the face weld. The results of analytical calculations are in good agreement with the results obtained using the finite element method.
  • Meshing Characteristics of Profile Shifted Cylindrical Quasi-Involute Arc-Tooth-Trace Gears. Part 1. Theoretical Base
    Pavlo Tkach, Olga Reviakina, Anatolii Kryvosheia, Volodymyr Melnyk, Oleksandr Ustynenko, Roman Protasov
    Strojnicky Casopis Journal of Mechanical Engineering, 2022
    A mathematical model of profile shifted quasi-involute arc-tooth-trace gears is obtained. The model includes functional relationships between the geometric-kinematic meshing characteristics and parameters of the generating surface as well as conditions which allow to prevent teeth undercutting and tip pointing. A short analysis of meshing characteristics value along the tooth trace is done for pressure angle value of 20º. This value of the angle was chosen as it is the most common one for general-duty gears, although the basic rack profile angle in the model is a variable quantity. The model can be used in the design and analysis of geometric-kinematic meshing characteristics of profile shifted quasi-involute arc-tooth-trace gears, cut by Gleason-type cutters with different profile angle value.
  • Effect of Load Eccentricity on Stress Condition of Butt Welded Joint with Asymmetrical Reinforcement
    Andrii Moltasov, Pavlo Tkach, Oleksandr Ustynenko, Roman Protasov
    Strojnicky Casopis Journal of Mechanical Engineering, 2022
    An analytical method for determination of a stress condition of butt welded thin-gauge plates with asymmetrical reinforcement is developed. The proposed method allows take into account the effect of the load application eccentricity on the tensile stress concentration factor (SCF) in the weld root zone. It is presented that the bending stresses, caused by this eccentricity, result in increasing the total stresses up to 75%. The results of analytical SCF calculations are in good agreement with the results obtained using the finite element method.
  • Mathematical Model and Optimization Algorithm By Mass of Tracked Load-Carrier/Prime Mover MT-LB Transmission
    Oleksandr Ustynenko, Oleksij Bondarenko, Illia Klochkov, Roman Protasov, Miroslav Bošanský, Sergij Andrienko
    Strojnicky Casopis Journal of Mechanical Engineering, 2022
    Solving the problem of optimization for transmission load-carrier/prime mover MT-LB improves the mass characteristics of the machine. Mathematical model of optimization was constructed, namely: optimization objective function was built; variables planning are defined; a system of constraints was constructed. The solution is based on probing the parameter space, where points of the LPτ-sequence are used as test points in a single multidimensional cube. Also, the algorithm for optimal design of the transmission has been developed.
  • Multiparameter Gears and Gear-Type Variators
    Mykola E. Terniuk, Anatolii V. Kryvosheia, Oleksandr V. Ustynenko, Oleksandr M. Krasnoshtan, Pavlo M. Tkach
    Advances in Gear Theory and Gear Cutting Tool Design, 2022
  • Methods of designing gear's machining tools with the hyperboloid cutting part
    Vorontsov Boris, Bosansky Miroslav, Kyrychenko Iryna, Kuzmenko Nataliya, Stupnytskyy Vadym, Kuleshkov Yuriy, Ustinenko Alexander
    Strojnicky Casopis Journal of Mechanical Engineering, 2020
    The technique of obtaining a hyperboloidal gear engagement with linear contact between a cylindrical involute wheel and a hyperboloid producing worm is considered. The resulting cutting tool greatly simplifies the manufacturing technology of hyperboloid worms and hyperboloid gears along with improved accuracy and roughness of the machined teeth and lower manufacturing costs.
  • A numerical analysis of non-linear contact tasks for the system of plates with a bolted connection and a clearance in the fixture
    Oleksandr Atroshenko, Oleksiy Bondarenko, Oleksandr Ustinenko, Mykola Tkachuk, Natalia Diomina
    Eastern European Journal of Enterprise Technologies, 2016