Determination of parameters of the Johnson-Cook model for the description of deformation and fracture of titanium alloys

Buzyurkin, A. E.; Gladky, I. L.; Kraus, E. I.

doi:10.1134/s0021894415020194

Cited by 20 publications

(5 citation statements)

References 3 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…In order to determine the parameter 1 H numerical simulation of impact of the obstacle at high-speed collision with the steel impactor was carried out using finite element package LS-DYNA [5]. LS-DYNA has a wide range of options for describing the behavior of elastoplastic materials under dynamic loads, but the choice of constants for a particular material is not an easy task, as it might seem at first glance [6][7][8].The problem was solved for 3D case in the Lagrangian formulation. Geometric model (see Fig.…”

Section: Numerical Simulationmentioning

confidence: 99%

A comparative analysis of several material models in LS-DYNA at high velocity impact

Bakulina

Buzyurkin

2019

EPJ Web Conf.

View full text Add to dashboard Cite

The questions of application of the LS-DYNA finite element analysis package for describing the interaction of a spherical projectile and a massive metal obstacle are considered. Based on a comparison of the results of numerical simulation with experimental data, a qualitative possibility has been shown to determine the magnitude of the dynamic hardness of the obstacle material.A simulation of the collision of a spherical impactor and a massive metal barrier shaped as a cube is performed. Data are obtained on the penetration of the striker into the barrier.Using the simulation curve, the values of the dynamic hardness of the obstacle were restored and a comparison was made with their experimental values. The qualitative correspondence is shown.

show abstract

Section: Numerical Simulationmentioning

confidence: 99%

A comparative analysis of several material models in LS-DYNA at high velocity impact

Bakulina

Buzyurkin

2019

EPJ Web Conf.

View full text Add to dashboard Cite

show abstract

“…Buzyurkin [6] presents in his study the analysis and verification of mathematical relations that describe deformation and fracture of the fan casing in a high-velocity impact with a fan blade simulator. Based on available experimental data, stress-strain curves were constructed for three titanium-based alloys (VT6, OT4, and OT4-0) under quasi-static loading.…”

Section: Fig 10mentioning

confidence: 99%

The Usage of the Johnson-Cook Constitutive Model in the Finite Element Analysis of the Caulking Process

Rodean¹,

Beju

Rusu

et al. 2019

MATEC Web Conf.

View full text Add to dashboard Cite

The present paper highlights the importance of generating a model for analysing the caulking process. The caulking operation is a fast, cost-efficient, cost-effective way of assembling, which is currently less studied in world-wide papers. The operation is at the border between plastic deformation and cutting process. It is therefore necessary to create a model to describe the process. In the paper are presented the main examples of applications, the main parameters that characterize the process, the current state of the cutting and plastic deformation models. After the analysis we concluded that the most valuable model for describing plastic deformations is the Johnson-Cook model. This information is the basis for developing a model for describing the caulking process.

show abstract

“…The constants are calculated according to the shock-wave experiments, determined from isentropic curves of unloading of porous samples, or are found from the experimental data in a wide area of the phase diagram from thermodynamic relations. It is worth mentioning the modern models with fewer constants as the initial data, but still there are too many of them to solve real engineering problems [4][5][6][7][8][9][10]. With this approach, the search for constants for the equation of state becomes a separate, time-consuming research task.…”

Section: Introductionmentioning

confidence: 99%

Melting behind the front of the shock wave

Kraus

Shabalin

2019

THERM SCI

View full text Add to dashboard Cite

A simple caloric model of the equation of state is proposed to describe thermodynamic properties of solid materials with phase transitions with the minimum number of parameters as initial data. Thermodynamic characteristics are calculated in the wide range of densities and pressures. The equation of state of the solid phase was modified by introducing configurational entropy, which made it possible to describe a liquid medium by the same functional dependence, but with its initial parameters. This allowed us not only to construct the equation of state for the liquid, but also to determine the dependence of the melting point on pressure as the boundary between the phases with the corresponding state. It is shown that the melting process is practically not noticeable on the shock adiabat in the pressurevolume plane; however, sharp adiabatic breaks are observed in the temperaturepressure plane. The calculated position of the melting curve agrees with the experimental data found; although this does not fully justify the conclusion about the accuracy of the calculation of the liquid phase adiabat, but fully confirms the qualitative picture.

show abstract

Determination of parameters of the Johnson-Cook model for the description of deformation and fracture of titanium alloys

Cited by 20 publications

References 3 publications

A comparative analysis of several material models in LS-DYNA at high velocity impact

A comparative analysis of several material models in LS-DYNA at high velocity impact

The Usage of the Johnson-Cook Constitutive Model in the Finite Element Analysis of the Caulking Process

Melting behind the front of the shock wave

Contact Info

Product

Resources

About