Identification criteria for vortex structures in a deformed solid

Kibitkin, V. V.; Solodushkin, A. I.; Pleshanov, V. S.; Чертова, Н. В.

doi:10.1134/s1029959914020064

Cited by 9 publications

(4 citation statements)

References 15 publications

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“…is considered as a multilevel hierarchically organized system, which experiences structural phase transformations at every scale. [12][13][14][15][16][17][18] The 17Mn1Si (X70 grade) structural steel (%0.2C, %0.5Si, %1.7 Mn À all in wt%) has long been successfully used due to a good combination of high strength, ductility, and fracture toughness. [8][9][10] Multiscale consideration of loaded solids can be performed within the physical mesomechanics approach applied to materials where structural levels of deformation and fracture are related to each other through the hierarchy of scales.…”

Section: Introductionmentioning

confidence: 99%

“…In this approach, understanding of the significance of rotational modes of deformation appeared to be of crucial importance. [12][13][14][15][16][17][18] The 17Mn1Si (X70 grade) structural steel (%0.2C, %0.5Si, %1.7 Mn À all in wt%) has long been successfully used due to a good combination of high strength, ductility, and fracture toughness. Its mechanical properties (ultimate tensile stress s % 570 MPa, elongation at break d % 20% and fracture toughness KCV % 150 Jcm À2 ) have been comprehensively documented for smooth specimens.…”

Section: Introductionmentioning

confidence: 99%

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Numerical and Experimental Study of Strain Localization in Notched Specimens of a Ductile Steel on Meso‐ and Macroscales

et al. 2016

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The computational approach for modeling the deformation behavior and fracture of materials with stress concentrators is proposed on the basis of the cellular automata technique. Numerical simulations performed on miniaturized specimens under dynamic loading are accompanied by laboratory tensile testing under quasi-static conditions applied to the specimens of a ductile structural steel with three typical notch shapes. Using in situ acoustic emission paired with digital image correlation techniques, it is shown that the notch shape exerts a very strong influence on the development of localized plastic flow and crack initiation ahead of the notch tip. It is concluded that the stress release occurs most effectively when the modulation of various components of the force moment takes place on mesoscopic scale.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Numerical and Experimental Study of Strain Localization in Notched Specimens of a Ductile Steel on Meso‐ and Macroscales

et al. 2016

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“…The development of experimental equipment and new research techniques such as Digital Image Correlation made possible a detailed study of stress and strain fields on the surface of the deformed heterogeneous sample [2] as well as identification of emerging therein vortex structures [3]. Certain notions of individual microfracture events, their sequence and interaction were obtained in the frame experimental study of structural changes in the composite based on fractographic analysis (study of fracture surfaces) [4][5][6].…”

Section: Introductionmentioning

confidence: 99%

Numerical Study of Deformation and Fracture of Ceramics Nanocomposite with Different Structural Parameters under Mechanical Loading

Konovalenko¹,

Vodopjyanov

Shilko³

2016

KEM

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Deformation, fracture and effective mechanical properties of sintered ceramics composite under uniaxial compression were studied. To perform this investigation the plain numerical model of ceramics composites based on oxides of zirconium and aluminum with different structural parameters was developed. The model construction was carried out within the frame of particle based method, namely the movable cellular automaton method (MCA). The implementation of the phase transition in the MCA-model composite was carried out on the basis of the phenomenological approach, the main point of which was the formulation of the principle of irreversible mechanical behavior of the material. Increase the fracture toughness of ceramics after (T-M) transition in its structure was realized in the model by introducing transition kinetics of the automata pair from "bound" to an "unbound" state. The structure of model composite was generated on the basis of scanning electron microscope images of micro-sections of real composite. The influence of such structural parameters as geometrical dimensions of layers, inclusions, and their spatial distribution in the sample, volume content of the composite components and their mechanical properties, as well as the amount of zirconium dioxide undergone the phase transformation on the mechanical response were investigated

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“…However, multiscale consideration of loaded solids might be performed within the physical mesomechanics approach applied to materials where structural levels of deformation and fracture are related to each other through the hierarchy of scales. In this approach, understanding of the significance of rotational modes of deformation appeared to be of crucial importance [3,[12][13][14][15][16][17][18][19][20][21].…”

Section: Introductionmentioning

confidence: 99%

Effect of notch shape on strain localization in steel under shock loading: Hybrid CA simulation

Моисеенко¹,

Maksimov²,

Panin³

et al. 2016

AIP Conference Proceedings

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Abstract.A hybrid discrete-continuum Excitable Cellular Automata (ECA) approach is proposed to study the vector character of the mass and energy transfer flows in a solid under high-rate loading. Based on the torsion energy calculations, the model of generation and accumulation of defect structures is proposed. Numerical simulations of uniaxial shock loading of specimens with three typical notch shapes are performed to validate the proposed approach. It is shown that stress relaxation occurs most effectively when the modulation of various components of the force moment takes place at various scales. This offers the possibility to reduce the stress concentration substantially by tailoring the materials microstructure.

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Identification criteria for vortex structures in a deformed solid

Cited by 9 publications

References 15 publications

Numerical and Experimental Study of Strain Localization in Notched Specimens of a Ductile Steel on Meso‐ and Macroscales

Numerical and Experimental Study of Strain Localization in Notched Specimens of a Ductile Steel on Meso‐ and Macroscales

Numerical Study of Deformation and Fracture of Ceramics Nanocomposite with Different Structural Parameters under Mechanical Loading

Effect of notch shape on strain localization in steel under shock loading: Hybrid CA simulation

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