Mesomechanical response of microstructure formed on the advancing side of friction stir welded aluminum

Балохонов, Р. Р.; Романова, В. А.; Batukhtina, E. E.; Shakhijanov, V. S.; Martynov, S. A.; Zinoviev, Aleksandr; Zinovieva, O.

doi:10.1063/1.4967058

Cited by 3 publications

(3 citation statements)

References 5 publications

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“…The computational volume is initialized with a certain distribution of nuclei being centers of growing microstructural elements (grains). Applying different combinations of the growth functions and nucleus distributions enables the fast generation of material structures with specified morphological characteristics [1][2][3][4]. C is the tensor of elastic moduli; the upper dot denotes time derivative.…”

Section: Microstructure-based Constitutive Modelmentioning

confidence: 99%

A Micromechanical Model of Additively Manufactured Aluminum Alloys

et al. 2019

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A micromechanical model is developed to predict the deformation behavior of additively manufactured aluminum alloys. Three-dimensional models of grain structures typical for different microregions of the melt pool are generated by the step-by-step packing method. A crystal plasticity-based constitutive model accounting for the elastic-plastic anisotropy of face-centered cubic crystals is employed to simulate the microscale deformation in an additively manufactured aluminum alloy under loading. The grain shape and texture effects on the plastic strain localization patterns are analyzed.

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Section: Microstructure-based Constitutive Modelmentioning

confidence: 99%

A Micromechanical Model of Additively Manufactured Aluminum Alloys

et al. 2019

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“…The limited possibilities of the pair approximation do not allow the adequate description of the processes of deformation and fracture of dense granular and consolidated materials with complex rheological properties (including elastic-plastic and viscoelastic materials, permeable fluid-saturated materials, etc.). Therefore, at present, the most common tool for modeling the mechanical behavior of such consolidated materials are numerical methods based on continuum mechanics [8][9][10][11].…”

Section: Introductionmentioning

confidence: 99%

The development of the formalism of movable cellular automata for modeling the nonlinear mechanical behavior of viscoelastic materials

Shilko¹,

Dudkin²,

Grigoriev³

2019

EPJ Web Conf.

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The paper is devoted to the development of the formalism of the computational method of discrete elements (DEM) for describing the mechanical behavior of consolidated viscoelastic materials. We considered an advanced implementation of DEM, namely, the method of movable cellular automata (MCA). A feature of this implementation of DEM is the use of a generalized many-body formulation of the relations for the forces of element-element interaction. 3D numerical models of viscoelastic material with a spectrum of relaxation times (Kelvin and Maxwell models, the standard model of elastomers, and others) were developed within the formalism of MCA. The correctness of the developed discrete element formalism and its applicability for modeling the processes of deformation and fracture of viscoelastic materials under dynamic loading are shown using the standard model of elastomers as an example. The relevance of the results is determined by the prospects for the further development of DEM and its application to study and predict the mechanical response of viscoelastic materials of various nature under dynamic loading including contact problems.

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“…In the contact zone of two bodies, intense processes of deformation, mixing and damage accumulation occur. Carrying out experimental measurements directly in this zone in dynamics is too difficult to implement, therefore, to study the processes taking place in the contact zone based on the methods of numerical simulation is in great demand [3][4][5][6]. The ability to explicitly describe the accumulation and generation of damage, as well as mass mixing, makes the method of movable cellular automata (MCA) a powerful tool for studying the dynamics of contact interaction [7][8][9].…”

Section: Introductionmentioning

confidence: 99%

3D simulation of dry friction of metal-based composites

2019

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A numerical 3D model of friction at mesoscale of the contact patch between steel samples and composite steel samples with carbon nanoinclusions has been developed based on the movable cellular automaton method. The response function of automata simulating steel corresponds to an elastic-plastic body with linear hardening, and the function for simulating carbon corresponds to an elastic-plastic body with bilinear hardening. Von Mises criterion is used for breaking bonds between the automata, and the criterion based on plastic heat is used for coupling the automata. The values of basic parameters of the model, as well as the loading conditions, that allow the formation of the characteristic quasi-liquid layer in the friction zone are determined. It was shown that the presence of carbon nanoinclusions in the contact region leads to decreasing of the coefficient of friction, lower values of stress, and higher shear strain in the friction zone.

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Mesomechanical response of microstructure formed on the advancing side of friction stir welded aluminum

Cited by 3 publications

References 5 publications

A Micromechanical Model of Additively Manufactured Aluminum Alloys

A Micromechanical Model of Additively Manufactured Aluminum Alloys

The development of the formalism of movable cellular automata for modeling the nonlinear mechanical behavior of viscoelastic materials

3D simulation of dry friction of metal-based composites

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