Numerical Simulation of Thermodynamic Parameters of High-Porosity Copper

Maevskii, K. K.; Кинеловский, С. А.

doi:10.1134/s1063784219080127

Cited by 13 publications

(4 citation statements)

References 19 publications

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“…The Mie-Grüneisen EOS, which relates the pressure (P), specific volume (V), and internal energy (E), is widely used to characterize the behavior of metal materials in highpressure physics [17][18][19][20][21][22][23]. In the study by Heuzé [24], the general P(V, E) Mie-Grüneisen form was extended to a complete S(V, E) form, which could provide all of the thermodynamic properties.…”

Section: Introductionmentioning

confidence: 99%

Hugoniot States and Mie–Grüneisen Equation of State of Iron Estimated Using Molecular Dynamics

et al. 2021

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The objective of this study was to develop a micromechanical approach for determining the Mie–Grüneisen EOS parameters of iron under the Hugoniot states. The multiscale shock technique (MSST) coupled with molecular dynamics (MD) simulations was employed to describe the shocked Hugoniot relation of single-crystal (SC) and nanocrystalline (NC) iron under high pressures. The Mie–Grüneisen equation of state (EOS) parameters, the cold pressure (Pc), the cold energy (Ec), the Grüneisen coefficient (γ), and the melting temperature (Tm) are discussed. The error between SC and NC iron results was found to be less than 1.5%. Interestingly, the differences in Hugoniot state (PH) and the internal energy between SC and NC iron were insignificant, which shows that the effect of grain size (GS) under high pressures was not significant. The Pc and Ec of SC and NC iron calculated based on the Morse potential were almost the same with those calculated based on the Born–Mayer potential; however, those calculated based on the Born–Mayer potential were a little larger at high pressures. In addition, several empirical and theoretical models were compared for the calculation of γ and Tm. The Mie–Grüneisen EOSs were shown on the 3D contour space; the pressure obtained with the Hugoniot curves as the reference was larger than that obtained with the cold curves as the reference.

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Section: Introductionmentioning

confidence: 99%

Hugoniot States and Mie–Grüneisen Equation of State of Iron Estimated Using Molecular Dynamics

et al. 2021

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“…Simulation requires a model of shock-wave loading of materials with components experiencing a phase transition under high dynamic loads. A reliable description for materials undergoing phase transition was obtained using the thermodynamic equilibrium model [20]. Based on this model, calculations of shock-wave loading of forsterite, considered as a mixture of quartz SiO 2 and periclase MgO in the ratio 1 : 2, are performed, based on the stoichiometric ratio.…”

Section: Problem Formulationmentioning

confidence: 99%

Modeling of shock-wave loading of magnesium silicates on the example of forsterite

Maevskii

2022

Technical Physics

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The results of modeling the shock-wave loading of Mg2SiO4 forsterite, which in this case is considered as a mixture of SiO2 quartz and MgO periclase, are presented. The model is based on the assumption that the components of the mixture under shock-wave loading are in thermodynamic equilibrium. The model allows us to reliably describe the phase transition region. The components of the investigated material are considered as a mixture of low and high pressure phases. Polymorphic phase transitions of quartz and periclase are taken into account in the calculation of forsterite in pressure range from 1 to 1000 GPa. The results are verified by experimental data obtained in dynamic experiments. Keywords: Equation of state, shock adiabat, thermodynamic equality, magnesium silicates, forsterite. DOI: 10.21883/0000000000

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“…Значения температуры получаются несколько завышенными при расчетах по данной модели. Для получения более достоверной информации, в том числе и о значениях температуры вдоль ударной адиабаты, разработана модификация рассматриваемого метода -модель TEC2 [35,36]. Для определения параметров уравнения состояния компонентов для модели TEC2 необходимо наличие достоверных данных по зависимости значения теплоемкости от температуры для компонентов исследуемого материала.…”

Section: результаты моделированияunclassified

Численное Исследование Ударно-Волнового Нагружения Металлических Композитов На Базе W И WC

Маевский¹

2021

Журнал Технической Физики

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The results of research on modeling shock-wave loading of metal composites – elkonites, which are sintered refractory materials tungsten, tungsten carbide or molybdenum impregnated with fusible metal silver or copper using thermodynamically equilibrium model TEC are presented. The investigation of the compressibility of such composites are related to the properties of the materials themselves and the possibility of creating samples based on them. Thermodynamic characteristics are calculated for these metals and compared with available data of shock-wave experiments. The model allows us to describe the dynamic loading of solid and porous alloys of various compositions such as Cu–W, Ag–W, Cu–WC, Ag-W. This model allows for targeted selection of material compositions of different porosity values and ratios of their components in order to obtain the specified characteristics for shock-wave loading of samples.

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Numerical Simulation of Thermodynamic Parameters of High-Porosity Copper

Cited by 13 publications

References 19 publications

Hugoniot States and Mie–Grüneisen Equation of State of Iron Estimated Using Molecular Dynamics

Hugoniot States and Mie–Grüneisen Equation of State of Iron Estimated Using Molecular Dynamics

Modeling of shock-wave loading of magnesium silicates on the example of forsterite

Численное Исследование Ударно-Волнового Нагружения Металлических Композитов На Базе W И WC

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