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Written by Штырев Н.А.

Parent Category: Categories RU

Category: Concept

Published: 13 June 2013

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Propositions on research directions by using the theory and relationships obtained. 

1. Working out engineering method of fatigue and durability computation by using obtained relationships, kinetic parameters (without using mechanical failure criteria) for nonsteady mechanical and thermal loads, uniaxial, combined stress condition.
2. Analytical research of relationship of the structure-and-physical properties of microscopic ingredient of material (thermal capacity, coefficient thermal expansion, thermal conductivity, modulus of elasticity, size of grain or segment of molecule and others) for tensile strength, durability of alloy, composite material, polymetric compound and others.
3. Analytical estimation of the effect of scale factor on durability and other physics-and-mechanical properties of materials in different unsteady conditions of loading (heavy loading, temperature etc.). 
4. Analytical estimation of the effect of exterior free surface and interior surface (microscopic cavities, fractures) for durability and life duration of material and a structure elements. Theoretical computation and comparison with the experimental data of strength characteristics and kinetic parameters of sphere metals, sphere plastics, fine threads and others. 
5. Estimation of influence of the various physicochemical factors of impact on material surface by kinetic parameters in the problems of durability and life duration.
6. Development of educated estimates Разработка методов расчетной оценки heat generation capacity, heating in material under straining, taking into account the effect of warming up on physic-mechanical processes of fracture and deformation, durability, life duration etc. . Effect of structure-physical anisotropy of a material on localization of heat-producing processes and fracture.
7. Estimation of effect of various physical factors (temperature, vibration, current, radiation and other) on kinetic energy structural parameters of material on different stages of formation, structure changes (solidification, crystallization, machining etc.).
8. Development and verification of the estimate method of generalized universal kinetic parameters for engineering material in accordance with the known mechanical characteristics.
9. Working out of computation methods of durability and life duration of structure materials in conditions of combined of strained and unsteady loading with different factors, based on the relationships obtained.
10. Working out of new computation methods and estimation of durability, fracturing, mechanics of strain, processing of materials and determination of physical-mechanical characteristic of materials by using structure-and-energy kinetic relationships and properties. Continuation of research by academician Zhurkov S.N. on studying interconnection between durability and life duration with physical properties and parameters of rigid bodies states: temperature expansion, thermal capacity, specific weight, thermal conductivity, electric conductivity, energy activation of fracturing, temperature , etc. . Working out fundamentals of general engineering physical theory of durability, life duration and fracturing of rigid bodies.
11. It is proposed to elaborate and verify experimentally methodology of determination (by the known experimental characteristics) of the new structural- kinetic generalized physical parameters of constructional materials which allow theoretically solving traditional пproblems of durability, life duration, mechanics and straining in conditions of unsteady loads without using in computations: fatigue limit, yield stress, damage, empirical coefficients and so on. The similar approach was realized in the works of Petrov M.G. (Novosibirsk) for uniaxial straining within the framework of composite physical-mechanical kinetic model of rigid body (physical medium) he developed. The author obtained the interconnection equations of structural- kinetic parameters from microscopic structural processes, taking place under noninvertible variations in rigid body under different modes of temperature-heavy loading, he worked out experimental-analytical method of determining necessary parameters to solve equations under given functional connections for strains and temperatures. We propose theoretical physical foundation of these results, analytical generalization and development of that approach for a case of combined strained condition taking into account the process of heat generation in materialе and others.

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Written by Super User

Parent Category: Categories RU

Category: Concept

Published: 12 February 2014

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Written by Штырев Н.А.

Parent Category: Categories RU

Category: Concept

Published: 07 June 2013

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The given research work was carried out as a private initiative. Beginning of the research was laid when the author Shtyryov N.A. has been working in a scientific department of Project-and-Design Bureau of the Academy of Sciences of the UkrSSR (ПКБ АН УССР) over the problem of estimation of materials fatigue endurance under impulse loads, at that the kinetic conception of fracture strength was used. Author expresses his appreciation and gratitude to his tutors and leaders of this scientific institution for teaching and formation of my scientific outlook. Next was the work in a position of the head of ships durability branch laboratory, studying in distance post-graduate studies in 1983-85. An unsuccessful attempt was undertaken to write Ph.D. thesis by using kinetic conception of durability of rigid bodies to solve the problem of estimation the fatigue strength of shipbuilding materials in assembly units of shipbuilding structures under low-cycle loads. There were some publications in terms of the given work. Since 1988 the author carried out the work as the individual independent research, which purpose was further development of generalized physical kinetic model of fracture and strain process of rigid body for non-steady loads and combined strained state, explanation of structural parameter physics of material in the formula of life duration by Zhurkov. In the heart of the work is the analysis of fundamental experimental results and analytical relationships obtained in kinetic conception and durability as well as generalization of experimental data on structural-kinetic submicroscopic processes taking place in strained rigid body. Idealized physical model of nonconvertible strain of real rigid body conglomerate by its algorithm of building is similar to the model of ideal gas in kinetic theory where a transition was realized from thermodynamic of gas state to the static thermodynamics of physical macroscopic state of idealized gaseous medium. After constitutive equation and analytical relationships were obtained in 2008 which allowed finding out noninvertible strains through physical kinetic molar parameters of strained rigid body, the experienced specialist in software technology and numerical methods, my friend Aleksandr Paplauskas, my friend selflessly assisted to carry out the numerical computations. Results of the computations make it possible to analyze and understand more sound the experimental fundamental results obtained in kinetic conception of durability, physics of theory and the law of structural-energy state of strained rigid body. Results of the research, computations and others are obtained within the framework of long-standing individual work of the author N.A.Shtyryov Numerical solutions of the equations, computation of the relationships etc. have been performed with the support of the specialist in software engineering A.R.Paplauskas.