Numerical Study of the Influence of Grain Size and Loading Conditions on the  Deformation of a Polycrystalline Aluminum Alloy

Zinovieva, O.; Романова, В. А.; Балохонов, Р. Р.; Zinoviev, Aleksandr; Kovalevskaya, Zh. G.

doi:10.4236/jamp.2014.26051

Cited by 7 publications

(5 citation statements)

References 14 publications

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“…It should be noticed that depending on the mechanical impact on the material the structure of surface damages will be varied. This numerously experimentally proved evidence testifies for the fact that surface layer of the material is the most "sensitive" in order to be used for characterization the kinetics of damage accumulation at various loading modes [8,9]. These above mentioned properties of material self-organization are widely used at development of instrumental techniques for fatigue fracture diagnostics of aircraft structures [10][11][12].…”

Section: Introductionmentioning

confidence: 83%

Multi-purpose fatigue sensor. Part 2. Physical backgrounds for damages accumulation and parameters of their assessment

Karuskevich¹,

Игнатович²,

Maslak

et al. 2016

Frattura Ed Integrità Strutturale

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The characteristic informative parameters for defect detection to be used in fatigue sensors have been established. Their development is interpreted in terms of scale levels of deformation and fracture. Damage accumulation of the sensor's surface tends to exhibit the self-organization nature. It is accompanied by formation of "folded" strain-induced relief on the surface. The mechanisms of damage accumulation under cyclic deformation were analyzed with the use of the multiscale approach.

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Section: Introductionmentioning

confidence: 83%

Multi-purpose fatigue sensor. Part 2. Physical backgrounds for damages accumulation and parameters of their assessment

Karuskevich¹,

Игнатович²,

Maslak

et al. 2016

Frattura Ed Integrità Strutturale

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“…To build a three-dimensional model of the grain structure, the solid bodies are constructed through the extrusion of two-dimensional microsection with a depth of 10 µ m, which corresponds to the average grain size in the normal direction of the sheet metal. For appropriate numerical accuracy, a Finite Element model with minimal three layers is used, which is also proposed by Zinovieva et al [27]. Panin et al identified that the first layer which is closest positioned to the surface has the main influence on the surface roughening [28].…”

Section: Numerical Prediction Of Strain-induced Roughening 21 the App...mentioning

confidence: 99%

Strain Induced Surface Change in Sheet Metal Forming: Numerical Prediction, Influence on Friction and Tool Wear

Recklin

Groche

2021

JMMP

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In sheet metal forming, free deformation of the sheet takes place frequently without contact with forming tools. The pre-straining resulting from the free deformation leads to a surface roughening of the sheet metal. It is assumed that the roughening has an influence on friction and wear behavior of the following forming process as well as the painting quality after the manufacturing. In this paper, a numerical prediction based on a polycrystalline model is first proposed to predict the effect of surface roughing based on the material data of the as-received state of the sheet metal. Different states of strain are analyzed and the numerical result is validated through experimental evaluation. Besides the numerical prediction, the friction behavior after pre-straining is evaluated in strip drawing tests and the coefficient of friction (COF) is calculated. For interpretation of the measured COF, the surface roughness after the friction test and the surface image are evaluated by a transparent toolset. It is shown that the surface transformation as a result of pre-straining has a negative influence on the lubricating effect of the sheet metal and degrades the friction behavior. Finally, the influence of the strain-induced surface roughening on wear is discussed based on wear testing in strip drawing test with draw bead geometry.

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“…Экспериментальные результаты и данные математических моделей свиде-тельствуют о том, что складкообразование, гофриро-вание, шахматное распределение областей экструзии и интрузии и т. д. являются характерными процессами при формировании деформационного рельефа и возникают при различных условиях нагружения в поли-и мо-нокристаллах [1][2][3][4][5][6][7][8][9][10]. Складкообразование реализуется при разных способах деформации, имеет многообразные проявления и может быть инициировано как скольжени-ем, так и двойникованием.…”

Section: Introductionunclassified

“…В настоящее время накоплен материал по математи-ческому моделированию процессов формирования ше-роховатости поверхности в различных условиях нагру-жения [1,2]. В работе [1] методом конечных элементов было проведено моделирование процесса возникновения шероховатости при пластической деформации образцов поликристаллического алюминия.…”

Section: Introductionunclassified

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Скольжение Как Базовый Механизм Образования Структурных Элементов Деформационного Рельефа

Лычагин¹,

Алфёрова²

2017

Физика Твердого Тела

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Представлены экспериментальные результаты исследования морфологии поверхности монокристаллов никеля после деформации сжатием. Выявлен квазипериодический характер деформационного профиля, общий для организации сдвиговой деформации структурных элементов рельефа различного типа. Показано, что их морфологическое проявление обусловлено локально действующими системами сдвига по октаэдрическим плоскостям. Установлены закономерности организации деформации в этих областях, обусловливающие формирование областей экструзии и интрузии материала и особенности накопления разориентировки. В том случае, когда наряду с октаэдрическим скольжением в формировании элементов рельефа задействована переориентация локальных областей, наблюдается значительно большее увеличение площади поверхности. Рассмотрена возможность использования для описания деформационного рельефа дву- и трехмерных параметров шероховатости поверхности. Исследование выполнено при финансовой поддержке РФФИ в рамках научного проекта N 16-32-60007 мол\_а\_дк. DOI: 10.21883/FTT.2017.07.44606.427

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Numerical Study of the Influence of Grain Size and Loading Conditions on the Deformation of a Polycrystalline Aluminum Alloy

Cited by 7 publications

References 14 publications

Multi-purpose fatigue sensor. Part 2. Physical backgrounds for damages accumulation and parameters of their assessment

Multi-purpose fatigue sensor. Part 2. Physical backgrounds for damages accumulation and parameters of their assessment

Strain Induced Surface Change in Sheet Metal Forming: Numerical Prediction, Influence on Friction and Tool Wear

Скольжение Как Базовый Механизм Образования Структурных Элементов Деформационного Рельефа

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