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Effect of laser shock hardening on the fatigue life of an OT4-0 titanium alloy is studied. Laser hardening is carried out using a fractionally modulated Nd:YAG laser operating at a pulse repetition rate of 10 Hz. It is suggested by the analysis of the effect of various laser treatment parameters on the magnitude and distribution of residual stresses over the sample thickness that an optimal type of laser shock treatment makes it possible to create a compressive residual stress region whose depth reaches up to 1 mm and whose maximum value is 600 MPa. It is shown by the results of studying the fracture surface structure that the fatigue fracture mechanism changes, while the service life of specimens significantly increases during both low- and high-cycle fatigue after laser shock hardening.

This paper describes an investigation of plastic instability of an internally impulsively loaded thin-walled spherical pressure vessel with plastic orthotropy. In the framework of finite deformation and Hill's orthogonal anisotropic yield criterion, the vessel instability strain is derived, which includes the effects of the plastic orthotropy and strain rate.

A method for determining the empirical dependence of the rheological properties of rocks on stresses has been developed and tested in the laboratory. The results of tests of cylindrical samples of rock salt and bischofite of the Nizhnevolzhsky deposit were used to obtain strain curves under stepwise loading and develop and verified a viscoelastic model describing the change in strains over time. It has been shown that the parameters characterizing the elasticity and the viscosity of the studied rocks decrease with increasing stress. This corresponds to the successive transition from the stage of elastic deformation to the stage of decaying, steady-state, and progressive creep. It has been established that creep of bischofite manifests itself at stresses above 0.5 MPa, and the creep of rock salt at stresses above 5 MPa. In relation to the uniaxial compressive strength and maximum strains, the creep of bischofite manifests itself at a relative strain above 0.0013 and at a relative stress of 0.19, and for rock salt, these values exceed 0.11 and 0.43, respectively.

The finite element method is used to obtain solutions to problems of strength and stability of reinforced cylindrical shells made of composite material with account for the momentum and nonlinearity of their subcritical stress-strain state. The stability of a reinforced aircraft fuselage compartment made of composite material is studied under pure bending and internal pressure loading. The effect of deformation nonlinearity, stringer stiffness, and shell thickness on critical loads at which shell buckling occurs is studied.

Exact and approximate analytical solutions are compared with experimental data on the geometrically nonlinear bending of a thin elastic cantilever beam under the action of a transverse concentrated load at its free end.

Area of study - external reflexively active environment with covering of information «cloudiness of turbulent mixing» of elements-data. Subject of study - methods of arrangement of information chaos, included in the processes of generation and reception of information. The aim consists both in the development of theoretical concepts of external reflexively active environment, formed by information media, and in the elaboration of maximally plausible model of reflection of the environmental «reality» in mental «vision» of decision makers. Tasks. Generalization of the fundamental scientific presuppositions of the «knowledge» category, falling into the conceptual framework of the theory of robust stability and explaining high sensitivity of the system to changes in initial data. Structuring of information chaoscovering of the environment under study, through examination of the generation process: selection of sources of information generation; arrangement of the concepts of area of study - «reproduction of new». Determination of the nature of «information cloudiness» in accordance with offered hierarchy of information structures, revelation of their covering via the use of the apparatus, describing entity characteristics of the behavior of reception process. Formation of the matrix of connectedness of types of structural formations of «information cloudiness» and cognitive tools of reception. Methodology. Logic of the study is built on dichotomy of the «appearance» and «reality» categories. The retrospective analysis considers the development of the approaches to structuring of external environment as an early stage of reproduction of the knowledge concerning object. The existing knowledge concerning external environment is supplemented, on the one hand, by the detailed decomposition of its structural model, on the other hand, by the development of the concepts of the methods of recognition of data entered into certain «information cloudiness». The objectness of information reception is reflected by formalized structures, composing cognitive tools of the transformer of information into knowledge. Results. Information sensitivity of robust control is justified, and a hierarchical model of information structures of external reflexively active environment is built. The types of «information cloudiness», making it possible to realize typological grouping of data, are defined for each structural formation. The matrix of connectedness of structural formations is built on the grounds of: types of «information cloudiness»; cognitive tools of reception. Scientific novelty lies in formation of the methodological approach revealing logic of the study. The application of the approach makes it possible to create the reflection, maximally close to «reality», of entity characteristics of chaotic external reflexively active environment filled with uncertainty and turbulent information flows; in building a mental model of decision maker, - their «vision» through transformation of reality via processes of generation of information structures and reception of «information cloudiness», covering of structural formations, by clustering of data and formalization of structures concerning transformation of information into knowledge. Currently important line of research is aimed at reaching maximum reflection of real state of information space of external environment in the mental model of decision maker, caused by the increasing requirements applicable to quality of information and its significant influence, exercised on the effectiveness of

The economy of our country and the enterprises that make up its basis are characterized by low indicators of labor productivity. One of the ways to eliminate this problem is the widespread digitalization of processes, which allows for total fixation of all operations, optimization of processes through deep analytics, automation of basic operations, operational restructuring of the strategy for changes predicted by big data analysis systems. For a number of reasons, the processes of digitalization of production, labor relations, financial and other operations are constrained, which does not allow obtaining the necessary effect from the implementation of expensive digital transformation projects. The world of work is one of the areas of promising changes, it is in it, according to experts, that the maximum effect from the digitalization of processes and functions can be manifested, for example: personnel assessment and development, remuneration, fixation of all labor transactions. Through the analysis of constraining factors, as well as an assessment of lost profits, recommendations were formed in the work for the development of directions for the digitalization of production processes at Russian industrial enterprises

The article considers the domestic and foreign experience of interpretation of the concept of «rural territories», associated with the ambiguity of its design. The approaches to the division of settlements into urban and rural are indicated. The approach to the types of settlements used in Russia is systematized. The basic criteria used for the typification of non-urbanized territories in the Russian Federation and in the OECD methodology are highlighted. The main demographic trends of the Novosibirsk region are analyzed. The typification of rural areas of the region according to a number of indicators used by domestic and foreign researchers was carried out.

The importance of agriculture to the modern economy actualizes investigation of the related investment processes. The example of the regions of the Southern Federal District is used to study the spatio-temporal dynamics of industry-based unit investments (taking into account agricultural area, number of employees and production cost equivalent). Series of special cartographical models are used for interpretation. The results revealed significant dynamism of investments during five years. It has become possible to trace geographical regularities of their changes and describe them by image models («wave», «spreading drop» and «waves from scattered drops»). Generally, the studied spatio-temporal dynamics of investments demonstrates oscillatory

The article is based on the results of an empirical study of management efficiency at agricultural enterprises in the Sevastopol region. The experience of the formation and functioning of the system of strategic management of the land and property complex in the organizations of the agrarian sector of the Russian Federation demonstrates a number of significant limitations and complications, including the dynamism of changes in the external environment, the lack of strategic vision of business development, unpreparedness of personnel, poor knowledge of strategic management tools etc., reducing its effectiveness, which requires a comprehensive study and approach to a solution. As a result of the study, a balanced approach to determination of the required number of BSC indicators was justified, supplementing the traditional BSC model with an investment component and justifying its use. The introduction of the BSC, as a method of strategic management adapted to the peculiarities of the agricultural business, makes it possible to solve the economic problems of each agricultural enterprise, as well as to form and implement an optimal management strategy in accordance with the available strategic opportunities.