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Physical Methods and Parameters for Assessing the Strength, Fatigue, Durability and Damage to a Structural Material

Journal of Mechanics Engineering and Automation 2019年第3期9卷 84-91页

作者： shtyrov nikolay Private Research and Production Company LYU Nikolayev 54020 PO Box 86 Ukraine

The methods and criteria of the physical theory of strength are used. The initial physical and mechanical parameters of the strength of steel 45 were determined analytically. Strength, fatigue and damage to steel were calculated for non-stationary mechanical and various thermal loads. The ratio between the physical and generally accepted mechanical parameters of the material strength is determined analytically. The result of the calculation of the new characteristics of the strength of the damaged material is given. The method takes into account plastic deformation, an arbitrary form of stress cycle, temperature mode. Additional physical criteria for evaluating the strength properties are proposed. We use our own calculation programs, which allow us to take into account the changed characteristics of the damaged material for various stress functions. The physical method allows you to analyze and quickly process the rheological data of sensors that control the parameters of the material under load. A method for rapid analysis and comparison of the results of indentation into the material in accordance with ISO 14577 using various indenters is proposed. Physical parameters of the material and new theoretical methods of calculation can be used to assess the properties of materials, monitor the condition and predict the strength and durability of the material of machines during operation.

关键词： Stress strain strength physical equation calculation

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Physical Macrohardness of the Kinetic Indentation of the Material: Function and Universal Unit of Measure (Part 1)

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Journal of Mechanics Engineering and Automation 2023年第3期13卷 64-78页

作者： shtyrov nikolay Private Research and Production Company“LYU” Nikolayev 54020PO Box 86Ukraine

Three directions of development of kinetic indentation ***-energetic analysis of the indentation force diagram according to ISO *** theory and universal criterion for the macrohardness of a *** of the physical process,thermomechanical potential,function of the state of the kinetic macroindentation *** for determining the physical function and unit of measurement of the kinetic macrohardness of a *** ratio of the values of the empirical(standard)and physical macrohardness of the *** reason for the appearance of the size effect in empirical indentation *** principle of determining the standard value of physical macrohardness.

关键词： Review physical theory of kinetic indentation method for determining physical macrohardness of the material

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Physical Properties of the Function and Number of Empirical Macrohardness of the Material: Universal Physical Unit of Measurement of Macro Hardness (Part 2)

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Journal of Mechanics Engineering and Automation 2023年第3期13卷 79-91页

作者： shtyrov nikolay Private Research and production Company“LYU” Nikolayev 54020PO Box 86Ukraine

Results of analytical studies of the physical properties of the function and number of empirical macrohardness based on the standard experimental force diagram of kinetic macroindentation by a *** analytical comparison method and a criterion for the similarity of the physical and empirical macrohardness of a material are *** physical properties of the hardness measurement process using the Calvert-Johnson method are *** physical reasons for the size effect when measuring macrohardness are *** universal physical unit and standard of macrohardness of kinetic macroindentation by a sphere is substantiated.

关键词： Physical theory of kinetic indentation method for determining the function and number of physical macrohardness ratio of empirical and physical macrohardness of a material universal physical unit of macrohardness.

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