Bobyr` Mykola І.

Development of a method for predicting carrying capacity and temperature stability of space vehicles platform

A simulation model was developed for the first time. That model takes into account variable temperature gradients, the scheme of reinforcement of multilayer PCM under conditions of complex dynamic and vibration load. For the first time, a phenomenological model of scattered destruction of anisotropic structural materials was developed. The main thermopower parameters of the operational load and the anisotropy coefficient were taken into account. A new method for estimating the strength of bolted joints of composite panels has been developed.

Development of technology and equipment for profiling of corrugated and ribbed tubes and creation of high-performance heat exchangers

The work is aimed at creation of high-efficiency heat regenerators of gas turbine units (GTU) of the gas transportation system of Ukraine. It is proposed to use highly effective heat exchange surfaces from the tubes of the spiral corrugated profile with high heat and aerodynamic characteristics for heat regenerators GTU, which will ensure a reduction of mass-dimensions by 30- 40% in comparison with heat exchangers made of smooth round tubes and an increase in the KPD GTU from 18-25% to 38-41%.

Development of the generalized lifetime prediction method for composite structures at complex low-cycle loading conditions with taking into account damage

The main result of the work is the development of generalizing phenomenological models of damage for anisotropic CM under static and cyclic loading conditions. A tensor of the damage
parameters for different CM’s and its invariants are shown. The methodology and the corresponding experimental data of CM’s mechanical characteristics for static and low cyclic loading conditions was obtained. Parameters of the developed model was calculated. The dependence of the damage parameters on the anisotropy CM is obtained. It makes it possible to

Developing of the aircraft’s wing construction elements lifetime prediction method duringmacrocracksinitiation stage with kinetics of scattered damage accumulation

The main result is a qualitative and quantitative assessment of the impact of complex operational and constructional and technological factors (geometric dimensions and the degree of plastic deformation of the material) on the parameters of the cyclic strength of elements of the power structure aircraft with functional openings in its infancy macrocracks taking into account the kinetics of accumulation of scattered damage.

Development of the generalized lifetime prediction method for composite structural elements at complex low-cycle loading with damage

The main result of work consists in development new physical equations theory of cyclic elastic-viscos-plasticity at complex technological and operational thermo-power loading; methods of theoretic-experimental lifetime calculation new products and residual lifetime definition of the responsible high-loaded designs elements machine-building complex different function at a stage of their operation.

Development of a new phenomenological models and general exploitation resource prediction method for construction elements made of composite materials in consideration of damage parameters.

There are developed new generalizing constitutive equation and phenomenological models, which describe dispersed damage accumulation kinetics in (CM) at macrocrack initiation stage in a case of complex technological and exploitation loading. There is performed a complex of experimental-theoretical researches to define applicability of developed dispersed fracture model and appropriated criteria in a case of static and programmed low-cycle loading for plane stress state.