FRACTAL ANALYSIS OF FRACTURE SURFACE OF ALUMINUM ALLOY AMg6 UNDER FATIGUE AND DYNAMIC LOADING

Oborin, Vladimir; Bannikov, Mikhail; Bayandin, Yuriy; Sokovikov, Mikhail; Bilalov, Dmitry; Naimark, Oleg

doi:10.15593/perm.mech/2015.2.07

Cited by 7 publications

(7 citation statements)

References 11 publications

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“…The obtained results confirm the possibility of using the developed technique for complex assessment of fatigue resistance in loading parameters and destruction surface of the functional material. The results show that mentioned characteristic scales L pz and l sc play an important role in the list of variables for the kinetic equation fatigue of crack growth and can be used for the identification of phenomenological parameters (power index) providing self-similar law for the crack path [15].…”

Section: Discussionmentioning

confidence: 99%

“…Let us assume that the digital image of a destruction surface of the studied functional material and the loading parameters corresponding to this surface are set. Analyzing the image by means of the wavelet-analysis [14], it is possible to allocate the basis parameters of a destrustion surface to which it is possible to relate: l sc -correlation scale in the ensemble of defects; L pz -the scale connected with a process zone and H -Hurst exponents [15]. The number of the chosen parameters is indicated as a variable k.…”

Section: Mathematical Modelmentioning

confidence: 99%

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Influence of microdamage structure on fatigue resistance of metal functional material

Bartolomey¹,

Boyarshinov²,

Batin³

et al. 2018

Proceedings of the International Conference "Actual Issues of Mechanical Engineering" (AIME 2018)

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The role of the collective behavior of defect ensembles at the crack tip and the laws of fatigue crack propagation in aluminum-magnesium alloy AMg6 have been studied under conditions of symmetric tension-compression gigacycle loading at 20 kHz using ultrasonic fatigue testing machine Shimadzu USF2000. 3D New View 5010 interferometer profiler high resolution data of defect induced roughness in the crack process zone under fatigue crack path revealed the existence of two characteristic scales: the scale of the process zone and the correlation length that is the scale when the correlated behavior of defect induced roughness has started. A mathematical model allowing the assessment of fatigue resistance of functional metal material on the basis of the analysis of loading parameters and the resulting fracture surface is developed. Analyzing the image by means of the wavelet-analysis, the basis parameters of a destruction surface are allocated. Based on the analysis of the destruction surface characteristics and the corresponding loading parameters, the fatigue life of the functional material is evaluated. For the solution of the problem, the elements of the fuzzy sets theory are used.

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Section: Discussionmentioning

confidence: 99%

Section: Mathematical Modelmentioning

confidence: 99%

Influence of microdamage structure on fatigue resistance of metal functional material

Bartolomey¹,

Boyarshinov²,

Batin³

et al. 2018

Proceedings of the International Conference "Actual Issues of Mechanical Engineering" (AIME 2018)

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“…The stationary solutions (these are the probability density distributions for the realization of the states ℎ at (ℎ , )/ = 0) of Eqs. (8) and (13) look like…”

Section: Langevin and Fokker-planck Equationsmentioning

confidence: 99%

“…It is known that, during the fragmentation of a metal specimen, which is performed with the help of severe plastic deformation (SPD) methods and under certain conditions, the so-called fractal structures are formed in the material [1][2][3][4][5][6][7][8]. As a result, the emerged grain (stationary) structure of the metal is characterized by the power-law size distribution for the ensemble of grains with various sizes.…”

Section: Introductionmentioning

confidence: 99%

Self-Similar Mode of Metals Fragmentation under Severe Plastic Deformation

Хоменко¹

2019

Ukr. J. Phys.

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In the framework of nonequilibrium evolution thermodynamics, the influence of additive fluctuations on the kinetics of structural defects under severe plastic deformation has been studied. The applied method is a new one for the description of fragmentation modes and corresponding self-organization processes. It is found that a fragmented metallic specimen demonstrates a self-similar behavior, which results in the formation of a grain structure with various grain sizes. Such a behavior takes place provided that the probability distribution for the grain boundary density has a power-law dependence. A comparison of the results obtained in the Itˆo and Stratonovich forms demonstrates the absence of qualitative changes in the behavior of the system.

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“…Исследован процесс зарождения и распространения усталостных трещин в титановых сплавах методом инфракрасной тер-мографии в условиях воздействия циклической нагрузки с помощью анализа поверхности разрушения [11], а также локализации деформаций при высокоскоростном деформирова-нии и распространении усталостных трещин в режиме гигациклового нагружения в спла-ве алюминия и магния AMr6 [12].…”

Section: Introductionunclassified

Fractal Analysis of Deformation Curves of Fiber-Reinforced Fine-Grained Concretes Under Compression

Selyaev¹,

Nizina²,

Balykov³

et al. 2016

PNRPU MB

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FRACTAL ANALYSIS OF FRACTURE SURFACE OF ALUMINUM ALLOY AMg6 UNDER FATIGUE AND DYNAMIC LOADING

Cited by 7 publications

References 11 publications

Influence of microdamage structure on fatigue resistance of metal functional material

Influence of microdamage structure on fatigue resistance of metal functional material

Self-Similar Mode of Metals Fragmentation under Severe Plastic Deformation

Fractal Analysis of Deformation Curves of Fiber-Reinforced Fine-Grained Concretes Under Compression

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