Numerical Simulation of Severe Plastic Deformation of Titanium Specimens under Dynamic Channel Pressing

2014 ◽  
Vol 1040 ◽  
pp. 107-112 ◽  
Author(s):  
Vladimir A. Krasnoveikin ◽  
Vladimir Skripnyak ◽  
Alexander A. Kozulin ◽  
Olga Senatova
Keyword(s):  
Numerical Simulation ◽  
Smoothed Particle Hydrodynamics ◽  
High Speed ◽  
Angular Pressing ◽  
Particle Hydrodynamics ◽  
Smoothed Particle ◽  
Smoothed Particle Hydrodynamics Method ◽  
Deformation Processes ◽  
Dynamic Channel ◽  
Dynamic Pressing

Deformation processes of the α-titanium specimens moving through the channels of the die for two loading schemes: equal channel angular pressing (ECAP) and channel pressing through the channel of variable form (CVF) are investigated. Schemes of dynamic pressing in case the block is extruded at high speed through the channel of the die due to the pressure of the punch or the pressure of powder gases were analyzed. The problem is solved by the smoothed particle hydrodynamics method (SPH) within the framework of elastoplastic continuum.

scholarly journals Mathematical modeling of the electron-beam wire deposition additive manufacturing by the smoothed particle hydrodynamics method

2019 ◽  
Vol 5 (1) ◽  
Author(s):  
Dmitriy Nikolayevich Trushnikov ◽  
Elena Georgieva Koleva ◽  
Roman Pozolovich Davlyatshin ◽  
Roman Mikhailovich Gerasimov ◽  
Yuriy Vitalievich Bayandin
Keyword(s):  
Numerical Simulation ◽  
Mass Transfer ◽  
Electron Beam ◽  
Additive Manufacturing ◽  
Heat And Mass Transfer ◽  
Smoothed Particle Hydrodynamics ◽  
Lagrangian Description ◽  
Particle Hydrodynamics ◽  
Smoothed Particle ◽  
Smoothed Particle Hydrodynamics Method

Abstract Background The actual problem for calculating a shape of free surface of the melt when analyzing the processes of wire-based electron-beam surfacing on the substrate, being introduced into additive manufacturing, is the development of adequate mathematical models of heat and mass transfer. The paper proposed a formulation of the problem of melt motion in the framework of the Lagrangian description. The mathematical statement includes the balance equations for mass, momentum and energy, and physical equations for describing heat and mass transfer. Methods The smoothed particle hydrodynamics method was used for numerical simulation of the process of wire-based electron-beam surfacing on the substrate made from same materials (titanium or steel). A finite-difference analog of the equations is given and the algorithm for solving the problem is implemented. To integrate the discretized equations Verlet method was utilized. Algorithms are implemented in the open software package LAMMPS. Results The numerical simulation results allow the estimation of non-stationary volume temperature distributions, melt flow velocities and pressures, and characteristics of process. Conclusion The possibility of applying the developed mathematical model to describe additive production is shown. The comparison of numerical calculations with experimental studies showed good agreement.

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