Deformation defects of the structural material as a factor of life aging

Pysarenko, Georgy; Voynalovich, O. V.; Maylo, Andriy; Pysarenko, Stepan

doi:10.1016/j.prostr.2021.12.079

Cited by 2 publications

(4 citation statements)

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“…Currently, in the thematic publications on the accumulation of fatigue damage in metallic materials, in particular those mentioned above in this article, insufficient attention is paid to the study of the correlation between the rate of metal damage and the large-scale hierarchy of multi-level damage at the stages of fatigue. The importance of the study of correlation relations under fatigue loading of metal structure samples is indicated in [4], which describes a statistical method for determining the degree of damage under variable loading based on the data of profilometric measurement of the fatigue topography of the sample surface in the range of amplitudes up to 1.0 μm. Based on the calculation and experimental results of the analysis of the morphology of the fracture surface of samples of materials with isotropic and anisotropic mechanical properties, it is proposed to determine a certain constant as a spatial parameter of the surface relief of a solid body characterized by scale invariance.…”

Section: Resultsmentioning

confidence: 99%

“…The resolution of the developed experimental information system for the analysis of quantitative characteristics of diffuse damage of elastic-plastic material by the method of coherent optical scanning is up to 0.2 μm/px. [4].…”

Section: Methodsmentioning

confidence: 99%

“…There is a need to develop alternative methods of research that allow obtaining parameters of the limit state of damage of highly stressed metal structures regardless of the limit characteristics of local centers of destruction. Such approaches include the methodology of determining the parameters of inelastic deformations, the kinetic characteristics of which contain information about the stages of fatigue and the residual resource of metal structures under multi-cycle fatigue in the range of 107-109 cycles [4].…”

Section: Introductionmentioning

confidence: 99%

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A methodical approach to determining the damage characteristics of cyclically loaded samples of metal structures

Pysarenko¹,

Voinalovich²,

Maylo³

et al. 2022

Tehnìka ta energetika

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The article deals with an actual task of developing engineering methods for predicting the durability of modern long-life machines should be based on the methodology for determining the degree of fatigue damage to materials and structural elements. In the development of such a methodology, the work proposes to use modern optical and computer tools that allow analyzing the parameters of the deformed surface of metal structure samples and, on this basis, to estimate the residual resource of the metal structure. The purpose of the article was to substantiate a methodical approach for determining the limit state of damage using photometric analysis of the topography of the micro-deformed surface of cyclically loaded metal structure samples. To analyze the fatigue damage characteristics of metals and alloys, an experimental information system was developed based on the method of coherent optical scanning of the deformed surface of metal structure samples with a resolution of 0.2 μm/px. The obtained specklograms of the photodiode matrix, corresponding to the two-dimensional image of the micro-deformed surface of the sample in shades of gray 0-255, were computer analyzed. This made it possible to construct diagrams of the kinetics of the process of accumulation of the amplitude of the deformation microrelief of the surface of the laboratory samples for the studied steels St 45 and St 20. It is shown that the kinetics of speckle brightness obtained in the work by the correlation method, which corresponds to the evolution of the accumulation of fatigue damage on the surface of the studied structural steel samples, is characterized by a nonlinear function, which is consistent with the results of deformation microrelief studies obtained by other methods. The proposed methodology for analyzing the discrete distribution of specklogram brightness can be used to predict the onset of the limit state of a metal structure before failure due to fatigue

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Section: Resultsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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A methodical approach to determining the damage characteristics of cyclically loaded samples of metal structures

Pysarenko¹,

Voinalovich²,

Maylo³

et al. 2022

Tehnìka ta energetika

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“…The deformation rate for all investigated prisms was 1.5 mm/min (Nilsson & Johansson, 2019;Huč et al, 2018;Zakic, 1974). The samples were tested by axial compression along the fibres untill their complete destruction (Rabko et al, 2021;Pysarenko, 1988;. Figure 4 shows the character of the destruction of the samples.…”

Section: Methodsmentioning

confidence: 99%

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2023

Scientific Horizons

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Deformation defects of the structural material as a factor of life aging

Cited by 2 publications

References 10 publications

A methodical approach to determining the damage characteristics of cyclically loaded samples of metal structures

A methodical approach to determining the damage characteristics of cyclically loaded samples of metal structures

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