Browsing by Author "Karuskevich, M.V."

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Aircraft design
(Національний авіаційний університет, 2013) Karuskevich, M.V.; Maslak, T.P.
The lectures include principal theoretical material and description of modern aircraft design.
Computer aided optical method for aircraft's components fatigue life estimation
(2008-09) Ignatovich, S.R.; Karuskevich, M.V.; Maslak, T.P.
The results of numerous tests show that quantitative estimation of accumulated fatigue damage may effectively be conducted by computer-aided optical analysis of the surface state. The method may be applied for alclad alluminium alloys which are used for modern aircraft skin manufacturing. The developed optical system and its software allow to determine the density of the areas with slip bands (damage parameter D), and a set of surface pattern fractal dimensions. These parameters allow to indicate more dangerous points of aircraft structures, predict fatigue crack under full scale test of aircraft structures as well as estimate residual service life.
Design of aviation machines. Modern regional turboprop
(Національний авіаційний університет, 2007) Karuskevich, M.V.; Maslak, T.P.
The lectures include principal theoretical material and description of modern turboprops with emphasize on Ukrainian An-140.
Evolution of the deformation relief on the surface of a clad aluminum alloy at random cyclic loads
(IPC Science and Technology Press, 2017) Ignatovich, S.R.; Karuskevich, M.V.; Yutskevych, S.S.
The deformation relief was revealed to be formed and evolved on the surface of a cladding layer of a D16AT aluminum alloy under random cyclic loading. The surface saturation, roughness, and microplastic deformation are found to be quantitative estimates of the deformation relief and damage levels. Experimental deformation relief characteristics-load cycle number relations are similar and can be employed for predicting the fatigue crack initiation in aircraft structure elements.
Extrusion/intrusion structures as quantitative indicators of accumulated fatigue damage
(IPC Science and Technology Press, 2011-02-22) Karuskevich, M.V.; Karuskevich, O.; Maslak, T.P.; Schepak, S.V.
Two approaches to aircraft fatigue monitoring by the computer-aided analysis of surface structures are described: (a) application of fatigue indicators attached to the aircraft unit; (b) the direct observation of the alclad aluminium alloys surface. The evolution of aluminium surface state has been monitored at various fatigue loading regimes. Some parameters have been used for the quantitative analysis of surface structures: (a) density of slip lines for single-crystals; (b) intensity and fractal dimensions of the deformation relief for polycrystalline aluminium. The possibility of a fatigue process prediction both at crack initiation stage and fatigue crack propagation stage is shown.
Fatigue damage and sensor development for aircraft structural health monitoring
(Elsevier Science Publishing Company, Inc., 2013-06) Ignatovich, S.R.; Menou, A.; Karuskevich, M.V.; Maruschak, P.O.
It was shown by tests conducted at the National Aviation University (Kiev, Ukraine) that fatigue damage of metal structures may be estimated by sensors with the surface relief pattern to indicate the accumulated fatigue damage. The nature of the deformation relief has been investigated by the light, scan and transmission microscopy, as well as by a new nano-interferometer, developed at the National Aviation University. Fractal analysis of the surface patterns based on box-counting method has proved the efficiency of fractal geometry application for additional quantitative description of such surface structures. The evolution of deformation relief parameters on the sensors surface is determined by the process of the sensor and construction fatigue damage accumulation.
Fatigue life prediction by the structurally sensitive damage indicator
(Ніціональний авіаційний університет, 2014) Karuskevich, M.V.
The investigations of the new fatigue sensor that was carried out at the wide range of cyclic loads conditions show the ability of the indicator application in Structural Health Monitoring systems of planes, bridges, vessels, and other structures. Accumulated fatigue damage may by estimated by the intensity of deformation relief, i.e. by its extrusion/intrusion and persistent slip bands structures on the indicator surface.
Lifetime and durability of aircraft
(Національний авіаційний університет, 2015) Karuskevich, M.V.
Multi-purpose fatigue sensor
(Gruppo Italiano Frattura, 2016-10) Karuskevich, M.V.; Ignatovich, S.R.; Maslak, Т.P.; Menou, A.; Maruschak, P.О.; Panin, S.V.; Berto, F.
The paper describes the key principles and results of preliminary experiments aimed at the development of new technique for the fatigue life prediction under conditions of biaxial cyclic tension. The foundations of the method were developed early by the numerous tests with monitoring the process of surface deformation relief formation, which is proved to be an indicator of accumulated fatigue damage under uniaxial fatigue. The employed phenomenon was early applied for the development of a family of uniaxial loading fatigue sensors. The formation of strain induced relief has been recently taken into consideration as a part of damage accumulation criteria under biaxial fatigue as well. The home-made testing machine has been designed to implement combined bending and torsion loading that simulates loads experienced by an aircraft wing skin. The experimental evidences on formation and evolution of the deformation relief revealed under conditions of combined loading, supports the proposed concept of biaxial fatigue sensor. The characteristic informative parameters for defect detection to be used in fatigue sensors have been established. Their development is interpreted in terms of scale levels of deformation and fracture. Damage accumulation of the sensor’s surface tends to exhibit the self-organization nature. It is accompanied by formation of "folded" strain-induced relief on the surface. The mechanisms of damage accumulation under cyclic deformation were analyzed with the use of the multiscale approach.
Single-crystals as an indicator of fatigue damage
(Fatigue of Engineering Malerials Ltd, 1992) Karuskevich, M.V.; Zasimchuk, E.E.; Radchenco, A.I.
The possibility of using specially prepared single crystals as indicators of fatigue damage is outlined. Results are described of an analysis of deformation patterns developed in the single-crystal indicator surface, under fatigue and static loading. It is shown that the density and direction of deformation bands correlate with the number of loading cycles.