THE DEPARTMENT HAS RESEARCH AND EDUCATIONAL «DURABILITY AND REMAINING LIFE OF AIRCRAFT» LABORATORY:
Structurally the laboratory consists of three divisions:
- Laboratory of surface nanotesting;
- Laboratory of aircraft durability diagnostic and remaining life forecasting;
- Laboratory of fuel and oil systems operational reliability and quality.
http://www.easn.net/network-members/cee/224/
1. LABORATORY OF SURFACE NANOTESTING
Laboratory works on development of instruments and technique for surface coating analysis at nanoscale level.
Directions of scientific researches:
1. Development of new hardware for surfaces micro- and nanotesting;
2. Investigations of physical-mechanical materials surface properties using nanoindentation and scratch testing technique;
3. Development of methodical maintenance for materials wear resisting estimation;
4. Research of topography of a surface with nanometer resolution.
Aluminum alloy D16AT surface relief changing under cyclic loading
In laboratory study disciplines which connected to diagnostic and monitoring of fatigue damage of aircraft construction.
2. LABORATORY OF AIRCRAFT DURABILITY DIAGNOSTIC AND REMAINING LIFE FORECASTING
Fatigue test machines room
The laboratory carries out fundamental and the applied researches directed on providing operational reliability and aviation technics durability; aviation construction elements and aviation constructional materials specimens fatigue tests by request of the scientific and design organisations, the industrial enterprises. The standard and original test equipment allows to conduct tests in a wide range of loading conditions.
The laboratory park of fatigue test machine consists of 12 hydropulsing machines among which there is a hydropulsing fatigue machine ГРМ-2А (GRM-2A), allowing to conduct dynamic tests with loading to 25 tone.
The digital servo-control test machine BiSS Bi-00-202V allows:
- to simulate variable amplitude load tests (for example, the programs simulating an operational load spectrum of civil aviation transport airplanes – TWIST, MiniTWIST, etc.).
- to study crack propagation by means of COD-gage in accordance to ASTM standards.
Tests of airplane skin fragment by TWIST program.
Directions of scientific researches:
1. Theoretical bases, methodical support and new hardware diagnostic facilities of aircraft construction strength.
2. New theoretical and tool methods (fatigue sensor) for aircraft loading history estimation and remaining life prediction.
3. Research of functional properties of anticorrosion coating.
Educational disciplines in laboratory:
1. Aircraft design and strength.
2. Aircraft remaining life and strength.
3. Aircraft construction diagnostic and fatigue damage monitoring
3. LABORATORY OF FUEL AND OIL SYSTEMS OPERATIONAL RELIABILITY AND QUALITY
The laboratory carries out the applied researches directed on operational reliability improvement of aircraft functional systems, preservation and restoration of operational qualities of their working liquids.
The natural stand of Antonov 148 airplane fuel system in a thermopressure chamber
Directions of scientific researches:
1. Bench and remaining life tests of aircraft fuel and oil systems;
2. Aircraft functional systems working liquids clarification and restoration of operational characteristics in a quasiconstant electric field;
3. Capacity of fuel and oil systems units;
4. Chemmotologic reliability of constructive circuits of fuel and oil systems and units;
5. Stabilization of quality of fuel in the conditions of ground outboard and onboard storage;
6. Modern power-saving methods of aircraft fuel systems protection from low temperature environment influences.
Educational disciplines in laboratory:
1. Aircraft functional systems;
2. Functional systems working liquids perspective methods of clearing;
3. Technological processes on petroleum products.
RESEARCH INVENTIONS OF THE DEPARTMENT
NANOINDENTATION TESRER “MICRON-GAMMA”
“Micron-gamma” has been designed to provide surface testing of different materials by measuring physical and mechanical characteristics in micro and nanometer scales using depth sensing indention and scratch testing technique. Indentation and data registration performed in automatic mode. This is the only way for evaluation of micro hardness, Young's modulus and other micro mechanical properties of small specimens and thin films.
The main technical specifications:
Load range, H……..…………..………0,01 - 5
Measured penetration depth, µm….0,01 - 200
Load speed, sH/s…………………..…0.01 - 100
Curing time under load, min……..…..0 -10
Scan range, mm…………………..….30×30
Scan speed, µm /s ………………….20 – 60.
Novelty and the main advantages:
– Multifunctional performance;
– Operation in real time;
– Differential measuring system of indenter penetration depth relatively to the specimen surface;
– Contactless electromagnetic loader;
– Light weight and small dimensions.
The depth sensing indention technique is based on automatic registration of load applied to the indenter and depth of its penetration. Results are presented in the form of load-displacement diagrams. Processing of these diagrams allows to determine the materials micro hardness and Young's modulus, to study the materials micro deformation peculiarities on the indention kinetics, to register the materials creep flow.
The scratch testing technique is based on continuous registration of resistance to indenter movement along the surface with a specified load. Determination of statistical connections between resistance of local material volumes to contact deformation allows characterize surface coating state along scanning path: to determine an average strength along the scanning path, to characterize heterogeneity of strength properties, to simulate elementary acts of friction and wearing out processes, to characterize the coatings adhesion.
NON-CONTACT INTERFEROMETRIC 3D NANOPROFILER “MICRON-ALPHA”
Non-contact interference three-dimensional profiler “Micron-alpha” offers to make two- and three-dimensional surface image, to obtain surface relief quantitative characteristics, to observe interference fringes, to carry out metallographic research.
The main technical specifications:
Scanning field (X,Y), µm ………….. 50-350;
Horizontal resolution (X,Y), µm ….. 0,15;
Vertical resolution (Z), nm…………. 5;
Maximum Step Height (Z), µm ……. up to 50;
Registration time, min……………… 0,1-3.
Novelty and the main advantages:
- High resolution;
- Multifunctionality;
- Work in real time;
- Low sensitivity to external fluctuations;
- Non-contact measurement of surface topography ;
- Quantitative characteristics of a surface topography (in graphic and a digital form);
- Representation of surface topography in 2D and 3D.
The measurement process is fully automated; a convenient interface is used for control. The Instrument software is compatible with a PC class computer and it works in Windows XP.
Non-contact profiler “Micron-alpha” can be successfully used in different areas of manufacturing and scientific research where the information about the surface relief is essential.
Evolution of a deformation relief on an area of the polished aluminium at cyclic loading
COMPUTER AIDED OPTICAL COMPLEX FOR AIRCRAFT FATIGUE DAMAGE ESTIMATION BY SURFACE DEFORMATION RELIEF PARAMETERS
Complex of diagnostic tools consists of the unified optical elements and the software, that allows to carry out the automatic fatigue damage estimation by deformation relief quantitative parameters.
This method is approved at laboratory fatigue tests of airplane construction typical elements carrying out.
The offered method most effectively can be applied at full-scale fatigue test of aircraft construction for probable fatigue cracks initiation zones definition. Also the method allows to determine constructions residual life under variable amplitude cyclic loading.
CLEANER ЭДГО -0,3/1,5 (EDGO-03/1.5)
Process of liquids clearing is carried out in a quasiconstant electric field of a high voltage.
It can be applied in technological processes of the process productions operating in an automatic continuous operating conditions. Cleaner ЭДГО-0,3/1,5 is applied for:
1. Thin clearing and dehydration of dielectric liquids, including new, in an as-received condition: working liquids of hydraulic systems of cars, aircraft, the robotised manufactures, press and other industrial equipment; a diesel fuel; aviation fuel; gasoline; mineral engine oils; siliconorganic working liquids; other dielectric liquids;
2. Periodic clearing of liquids while in service and for prolongation of life cycle of liquids.
In world practice analogues ЭДГО-0,3/1,5 are absent.
FACILITY FOR JET FUEL WATERING
Is using during refueling of aircrafts for carrying out flight tests.
The facility allows jet fuel watering directly during refuelling of aircrafts with dispersion of microdrops emulsion waters from 0,8 to 26 microns and the general content of free water to 280 (gram/tone fuel). The watering error relative to the established level of water content in a fuel flow does not exceed 6 %.
AVIATION ANTICORROSION COMPOSITION (ASA)
Film-forming inhibited oil compositions (FIOC) of ASA series is a mixture of high-molecular film-forming mineral oils with corrosion inhibitor and solvents additives.
Developed (FIOC) is delivered to the coatings which washing-off under the influence of oil solvents.
Compositions displace water from exposed surfaces and cracks, generates thin transparent film. Coating is elastic and has resistant to cracks formation.
Composition appearance - is ready for use liquids with soft brown color.
Film appearance – thin, translucent, oily, gradually drying up film.
Approximate expenditure no more than 100g/m2.
High protective properties of obtained basic anticorrosion composition permit essentially expand field of its application and create new line of high-performance compositions:
“АSА - А” -protect aluminum alloys construction
“АSА - S” -protect steel construction
“АSА-АVТО” - protect cars components.
