SOME MODELS OF MECHANICS OF LOCAL DAMAGE

Yelovoy O.M., Candidate of Technical Sciences, Office of the Council of Ministers of the Republic of Belarus, 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.

The technique for determination of local damage of complexly loaded mechanical system based on model of the deformable rigid body with dangerous volume is considered. Calculation of damage contact interaction is made. Considerable change of dangerous volume and local damage due to action of friction force is shown.

dangerous volume, local damage, contact interaction, simulation of stress states

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THE LIFE-TIME OF TRIBO-FATIGUE SYSTEMS

Vysotski M.S., Academician, Joint Institute of Mechanical Engineering of the NAS of Belarus, Minsk, Republic of Belarus

Bogdanovich A.V., Doctor of Technical Sciences, Leda College of UO "Grodno State University n.a. Ya. Kupala", Lida, Republic of Belarus, This email address is being protected from spambots. You need JavaScript enabled to view it.

An approach for the calculate-experimental estimation of the life-time of active systems under regular and unregular loading based on energetic criterion of limiting states for such systems and nonlinear wear-fatigue damage hypothesis is discussed in paper. The check-up of the proposed formulae on mechano-sliding fatigue test results under regular loading and on fretting fatigue test results under regular and block loading is carried out. It is shown the satisfactory conformity of theory and experiment under given conditions.

resource of power system, electronic-mechanical fatigue, fretting fatigue, regular and block-loading, accumulation of damages

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GENERALIZED TRIBO-FATIGUE PROBLEM

Sherbakov S.S., Candidate of Physics 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.">This email address is being protected from spambots. You need JavaScript enabled to view it.

Statement of the problem of determining mechanical state of the system of n moving continuums of various properties is offered. This statement includes both the equations of continuums motion and the set of boundary conditions for each of the continuums defined by character of their interaction. The system of the resolving integrated equations is offered for the system of solids. Given system may be applied for determination of normal and tangential tractions on surface of each body, and also a stress-strain state of its interior that allows to investigation of direct and back effects for tribo-fatigue system consisting of more than two elements.

contact and non-contact loads, forward and reverse tribo-fatigue effect, stress tensor, modeling of damages

• Sosnovskij L.A. Mehanika iznosoustalostnogo povrezhdenija [Mechanics of wear-fatigue damage]. Minsk, BelGUT, 2007. 434 p.
• Zhuravkov M.A. Matematicheskoe modelirovanie deformacionnyh processov v tverdyh deformiruemyh sredah (na primere zadach mehaniki gornyh porod i massivov) [Mathematical modeling of deformation processes in deformable solid medium (for example, problems in mechanics of rocks and arrays)]. Minsk, BGU, 2002. 456 p.
• Zhuravkov M.A., Martynenko M.D. Singuljarnye reshenija i integral'nye uravnenija v mehanike deformiruemyh sred [Singular integral equations and solutions in mechanics of deformable media]. Minsk, BGU, 1999. 358 p.
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PREDICTION OF MECHANICAL CHARACTERISTICS OF ASPHALT CONCRETE

Chernous D.A., Candidate of Technical Sciences, Institute of Mechanics of Metal-Polymer Systems n.a. V.A. Belyi of the NAS of Belarus, Gomel, Republic of Belarus

Shilko S.V., Candidate of Technical Sciences, Institute of Mechanics of Metal-Polymer Systems n.a. V.A. Belyi of the NAS of Belarus, Gomel, Republic of Belarus, This email address is being protected from spambots. You need JavaScript enabled to view it.

Kravchenko S.E., Candidate of Technical Sciences, Belarusian Road Research Institute, Minsk, Republic of Belarus

The simplified analytical technique of stressstrength determination for asphalt concrete, assumed as twocomponent disperse reinforced composite, has been proposed. The dependences of the effective Young’s modulus and strength of asphalt concrete by tension on volume fraction of rubble have been obtained.

asphalt, dispersion-reinforced composite, volume filler content, deformability, strength, effective mechanical characteristics, mesomechanics

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