Department of Theory of Physico-Mechanical Fields

A variant of the theory of quantitative description in the interconnection of electromagnetic, thermal and mechanical processes in electroconductive deformable solids with different electrical conductivity and the ability to magnetization and polarization subjected to quasi-steady electromagnetic fields of the radio and infrared frequency ranges is constructed

A research methodology of thermo-stressed state of electroconductive solids at high-temperature induction heating is proposed. It may also be applied to research of temperature fields and stresses in the solids made from electroconductive non-metallic materials subjected to quasi-steady electromagnetic fields

A mathematical model of the quantitative description of interconnected mechanical, thermal and diffusion processes in partially transparent solids with gas admixtures subjected to both electromagnetic fields of the radio frequency range and infrared radiation is constructed

A mathematical model and method of quantitative calculation of phase composition and corresponding residual stresses in the products made of glass and low-alloy steels subjected to simple (monotonic) cooling modes have been developed

A numerical-analytical method of optimization of the thermo-stressed state of electroconductive solids at heating by external quasi-steady electromagnetic radiation and convective is proposed, when the areas of permissible change of the external action parameters and the thermo-stressed state are specified. The method is based on the constructed variant of the theory of thermomechanics of electroconductive solids, the variational calculus and the optimization methods of local variations and gradient projections, in which the numerical methods for solving direct problems are used

A mathematical model of high-speed deformation of thermoelastic solids was constructed, which takes into account the effects of the inertia of the mechanical form of motion

A method for investigating the effect of cooling modes on the stress-strain state of solids during high temperature annealing, taking into account the thermoelastoplastic deformation has been developed

A methodology of stress optimization of the heat treatment processes in the technologies of the manufacturing of electrovacuum devices is developed

A method of investigation the thermo-stressed state of the shells made from magnetic electroconductive materials, subjected to quasi-steady electromagnetic field, taking into account a skin effect was worked out in cooperation with Opole University of Technology and L’viv Faculty of Dnipro National Technical University of Railway Transport

A model of thermomechanics of non-ferromagnetic non-dielectric electroconductive solids subjected to electromagnetic action, which has the character of the regime with amplitude modulation at pulsed modulating signal has been constructed in cooperation with L’viv Polytechnic National University. It provided an opportunity to perform a wide range of studies of the mechanical behavior of elements of structures and devices depending on the characteristics of impulse action and material properties

An approach to the determination of radiation and thermal characteristics of solids with different transparency was proposed during the cooling process research. The features of known models describing the radiation and heat transfer for solids with different radiation properties and the possibility of using simplified heat transfer models in elasticity problems are studied

A variant of the theory of mechano-thermo-electro-diffusion of solids capable to magnetization and polarization under the action of an external electromagnetic field is constructed. The effect of electromagnetic and temperature fields on the diffusion of neutral particles in the ferromagnetic layer is considered

A research methodology the thermomechanical behavior and bearing capacity of non-ferromagnetic electroconductive solids with plane-parallel boundaries subjected to characteristic types of pulsed electromagnetic fields with modulation of amplitude, taking into account the thermoelastic energy dissipation has been developed

A numerical method for research and optimization of residual phase and stress states of thin plates made of low-carbon low-alloy steels, subjected to local high-temperature heating by moving normally distributed heat sources and subsequent monotonic cooling, is proposed

A technique of determination of bearing capacity and resource of power aggregates elements which are in conditions of long-term exploitation is constructed. The basis of mathematical models of quantitative description of deformation processes of technical equipment elements is the three-dimensional relations of the theory of thermo-elasto-plastic, which allowed to adequately take into account the actual form of structural elements, especially in the vicinity of damaged areas or repair interventions. The technique has been used to develop the technology of repair works on the steam boiler drum of the block No.5 of DTEK Burshtyn TES