MATHEMATICAL MODELING OF RELAXATION-DEFORMATION PROCESSES OF TEXTILE MATERIALS AT VARIABLE TEMPERATURE

Author(s):  
A.V. Demidov ◽  
A.G. Makarov ◽  
N.V. Pereborova ◽  
V.I. Wagner
2007 ◽  
Vol 39 (6) ◽  
pp. 488-491
Author(s):  
A. V. Demidov ◽  
A. G. Makarov ◽  
A. M. Stalevich

Aviation ◽  
2008 ◽  
Vol 12 (1) ◽  
pp. 3-9
Author(s):  
Alexander Bogorosh ◽  
Sergey Voronov ◽  
Sergey Larkin ◽  
Vladimir Karachiun ◽  
Nikolaj Vishniakov ◽  
...  

An investigation of the corrosive and mechanical destruction of microelectronic objects such as multipurpose sensors and navigating devices used in the airspace industry in extreme conditions such as variable temperature, pressure and environmental composition is described. The appearance and growth of micro cracks and other defects in metallic parts and conductors of micro devices due to external actions are investigated. The structural features of defect‐testing devices improved on the basis of magnetic modulation sensitive iron elements are analyzed. Mathematical modeling for the most characteristic types of defects is performed and the forecast growth of defects within 6 % accuracy is achieved. Santrauka Atlikti mikroelektronikos objektų, eksploatuojamų ekstremaliomis sąlygomis bei esant kintamoms temperatūroms, slėgiui, darbinės aplinkos sudėčiai, irimo tyrimai, tarp jų – mikroįtrūkimų ir kitų defektų atsiradimo bei augimo mikroprietaisų metalinėse dalyse ir laidininkuose. Pagerinti prietaisų, gaminamų fero-moduliacinių elementų pagrindu ir skirtų mikroprietaisų defektų kontrolei, konstruktyviniai sprendimai. Sudarytas matematinis modelis, leidžiantis analizuoti būdingiausių rūšių defektus ir iki 6 % tikslumu prognozuoti defektų plitimą.


Author(s):  
Valery S. Khoroshilov ◽  
◽  
Alexander V. Komissarov ◽  
Natalia N. Kobeleva ◽  
◽  
...  

The article discusses the possibility of using mathematical modeling to assess the state of the main technological equipment of the chamber for receiving and launching cleaning and diagnostic tools (PPC) to predict possible changes in the position of equipment elements from the corresponding design values. Based on the completed planned cycles of geodetic observations, based on the measurement results, calculations were made to build predictive mathematical models for the subsequent study of the deformation processes of the main technological equipment of the chamber for receiving and launching cleaning and diagnostic tools. The mechanisms of sequential processing of the measurement results for the sample belonging to the law of normal distribution by an approximate method and fur-ther data preparation by forming statistically homogeneous groups of process implementations in order to build predictive mathematical models are shown. According to the prediction results, deformation marks were identified, for which the process of deformation proceeds with a higher rate of upsetting in comparison with other marks. Recommendations for further geodetic observations are proposed.


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