- Details
- Written by Штырев Н.А.
- Parent Category: Categories RU
- Category: Concept
- Published: 13 June 2013
- Hits: 3015
Propositions on research directions by using the theory and relationships obtained.
- 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.
- 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.
- 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.).
- 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.
- Estimation of influence of the various physicochemical factors of impact on material surface by kinetic parameters in the problems of durability and life duration.
- 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.
- 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.).
- Development and verification of the estimate method of generalized universal kinetic parameters for engineering material in accordance with the known mechanical characteristics.
- 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.
- 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.
- 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.