POWER OF MOVEMENT OF THE SPORTSMAN AT INTERACTION WITH THE ELASTIC SUPPORT

Pokatilov A.E., Mogilev State University of Food Technologies, Mogilev, Republic of Belarus, This email address is being protected from spambots. You need JavaScript enabled to view it.

Zagrevsky V.I., Doctor of Educational Sciences, Mogilev State University n.a. A.A. Kuleshov, Mogilev, Republic of Belarus

Lavshuk D.A., Candidate of Educational Sciences, Mogilev State University n.a. A.A. Kuleshov, Mogilev, Republic of Belarus

Power aspects of operated movement of the sportsman for a case of interaction with a apparatus showing elastic properties are examined. Research is executed on an example of the big turn back on a horizontal bar in sports gymnastics. In fullscale and computing experiments the opportunity of division of two systems is revealed: a apparatus and the locomotive system of the person. Their mutual influence against each other through power developed during movement is shown. At purposive movement of the sportsman applied models for movement concerning joints and concerning a sports apparatus differ in a kinematic part: in the first case power is determined on articulate angular speeds, in the second-on full angular speed of rotation of hands.

sports gymnastics, elastic properties, movement of the sportsman

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HEAT BUILDUP NATURE IN COLD DEFORMATION REBAR

Moyseychik E.A., Candidate of Technical Sciences, Belarusian National Technical University, Minsk, Republic of Belarus, This email address is being protected from spambots. You need JavaScript enabled to view it.">This email address is being protected from spambots. You need JavaScript enabled to view it.

Shown that the processes of heat generation and distribution of carbon steel during the deformation are interrelated. Plastic deformation causes a redistribution of carbon in various locations of the deformed volume. Areas with large plastic deformations have a higher carbon content. At these sites during the deformation of the rod is more intense heat buildup. Sources of heat are thermochemical processes associated with the migration of carbon between dislocations and carbonsteel components. We present experimental data.

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MECHANICS OF C60 FULLERENE IN THE CENTRAL FORCE FIELD APPROXIMATION

Radkevich E.A., Belarusian State University, Minsk, Republic of Belarus, This email address is being protected from spambots. You need JavaScript enabled to view it.

Repchenkov V.I., Candidate of Technical Sciences, Belarusian State University, Minsk, Republic of Belarus

Chizhik S.A., Corresponding Member, Presidium of the National Academy of Sciences of Belarus, Minsk, Republic of Belarus

Mikhasev G.I., Doctor of Physical and Mathematical Sciences, Belarusian State University, Minsk, Republic of Belarus, This email address is being protected from spambots. You need JavaScript enabled to view it.

With "Mathematica" we have developed a computer finite element model of mechanical behaviour for C60 fullerene molecule in the central force field approximation. The model has under gone virtual static tests with different loading pattern - axial compression by point force; uniform external pressure. Young modulus variation limits are determined as follows 0,29 TPa <E< 10,36 TPa, under the most realistic values of force constants in accordance with hypothetical wall "thickness" of fullerene and Poisson's ratio quantity. Evidence is given that the model shows low sensitivity to fluctuations of valence bond force constants and is much more sensitive to fluctuations of nonvalent ones. Tree times changes of force constants change the results of the calculation elastic response of structure by ~16%-41%, in the former case and by ~88%-127% in the latter.

computer finite element model, variation limits, axial compression, virtual static tests, fluctuations of valence bond force

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FEATURES OF DEFORMATION DIFFERENT DETAILS’ SURFACES OF TRANSMISSION OF MOBILE MACHINES WITH THE SIMULTANEOUS HIGH FREQUENCY HARDENING

Mihlyuk A.I., Candidate of Technical Sciences, Minsk Automobile Plant, Minsk, Republic of Belarus

Statistic facts about deformation different surfaces with simultaneous induction heat treatment of mobile machine`s details and results of optimization regimes and ways of hardening, provided minimization values of deformations are represented.

simultaneous induction, heat treatment, optimization regimes

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