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Article
Mechanical Properties of Materials in the Calculations of a Low-Cycle Deformation of Structures
Standard strength calculations for bearing units of extremely loaded structures, including nuclear power plants, allow an inelastic deformation of the materials of these units. At the same time, the calculatio...
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Article
Computational and Experimental Analysis of Resistance to Low-Cycle Deformation of Heat-Resistant Alloy
It is noted that, in the general case, diagrams of cyclic elastoplastic deformation of a material characterize its resistance to low-cycle loading and display the relationship between current stress values and...
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Article
Coupled thermo-mechanical analysis of stress–strain response and limit states of structural materials taking into account the cyclic properties of steel and stress concentration
Two groups of governing equations have been obtained due to the extensive theoretical and experimental studies in the field of mechanics of deformable solids conducted worldwide: (1) constitutive equations and...
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Article
Study of the Regularities of Resistance to Deformation and Damage Accumulation under Irregular Low Cycle Loading
In this paper, we present the results of computational and experimental studies of changes in patterns of resistance to deformation and damage accumulation under conditions of irregular low-cycle loading, whic...
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Article
Study of Material Properties under Complex Conditions of Low-Cycle Deformation
The operability of structures in complex combined loading modes depends on a significant number of combinations of operational parameters of thermomechanical impacts in terms of loads, temperatures, times, num...
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Article
Analysis and Control of the Strength, Useful Life, and Safe Operation Risks of Power Plants with Various Kinds of Energy Commodities
According to the scientific analysis of the conditions of the transition from regular to catastrophic situations at thermal power, hydropower, and nuclear power facilities, an important role in maintaining and...
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Article
Features of the Kinetics of Cyclic Elastoplastic Deformation Diagrams at Dwells in Cycles and Superimposition of Variable Stresses on Them
The goal of the study is determination of the regularities of changes in cyclic strains and related deformation diagrams attributed to the existence of time dwells in the loading modes and imposition of additi...
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Article
Unification of Calculation Methods and Tests for Strength, Resource, and Crack Resistance
In this paper, we show that the solution of the problems on strength, resource, and crack resistance for all objects of the machine-building complex is largely reduced to the scientifically substantiated deter...
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Article
Calculation and Experimental Estimation of the Role of the Frequency Ratio in Changing the Durability at Two-Frequency Deformation Modes
The cycle configuration at two-frequency loading modes depends on the number of parameters, including the absolute values of the frequencies and amplitudes of the low-frequency and high-frequency loads added d...
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Article
Integrated Assessment of the Durability, Resources, Survivability, and Safety of Machinery Loaded under Complex Conditions
It is shown that a multiparameter system of strength, resource, survivability, and safety assessment applies to measuring parameters such as the static, dynamic, and cyclical strength, cracking resistance, col...
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Article
Study of the Effect of Strain Amplitude Ratio at Two-Frequency Cyclic Loading
The operating modes of loading elements of machines and structures exhibit, as a rule, more complicated character of their loading cycles compared to sinusoidal used in the practice of calculations and experim...
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Article
Study on Damaging and Fatigue Life of Constructions under Single- and Two-Frequency Loading Modes Based on Deformational and Energy Approaches
The damage accumulation patterns under one- and two-frequency loading modes were studied on the basis of deformation and energy failure criteria under elastoplastic cyclic deformation. It is demonstrated that ...
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Article
Justifying Calculations of the Security of Promising Machines and Man–Machine Systems on the Risk Criteria of Accidents and Disasters
Further development of calculation and experimental analysis methods and ensuring their security against risk criteria for the prevention of accidents and disasters is considered. Of particular importance in t...
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Article
Methodological basics of nondestructive testing, diagnostics, and monitoring of conditions for materials and engineering systems
This article presents a review of safety validation, calculations of initial and residual life, reliability, and survivability of equipment critical structures based on analyzing stress-strain states following...
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Article
Stress–Strain Kinetics in Calculations of High-Temperature Strength and Longevity of Reactor Structures
The plastic properties of materials must be used more fully as working temperatures and temperature gradients increase. The results of tests performed on refractory chromium-nickel alloys with co...
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Article
The influence of quasi-static loading regimes on the strength of vessels operating under pressure
The influence of long-term quasi-static loading on characteristics of deformation stress and fracture of vessels operating under pressure is examined. It is proposed to account for parameters of accumulated st...
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Article
Factors of estimation of stress states, durability, and resource of critical threaded connections
Factors influencing the estimation of stress-strain states and characteristics of the durability and resource of critical threaded connections used in various fields of mechanical engineering is studied taking...
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Article
Methods of the calculation and experimental determination of the local residual stresses under spectrum development of complex loading
The problems of the analysis of residual technological stresses (RS), the knowledge of which is one of the important conditions for the substantiation of strength, service life, and safety of machinery, are in...
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Article
Estimation of the effect of loading modes on the conditions of attainment of marginal states and resource assignment
The conditions of the attainment of marginal states in the machine and structural material at static and cyclic modes of service stress loading are considered. The approaches to resource assignment according t...
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Article
Specific features of elastoplastic deformation and fracture of steels at complicated thermomechanical stress paths
Regularities of cyclic elastoplastic deformation and fracture are studied on the basis of the damage accumulation parameter at increased and high temperatures considering the effect of cyclic changes in the ma...
