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Marcin Kubiak - One of the best experts on this subject based on the ideXlab platform.

  • Numerical Estimation of the Shape of Weld and Heat Affected Zone in Laser-arc Hybrid Welded Joints
    Procedia Engineering, 2017
    Co-Authors: Wiesława Piekarska, Marcin Kubiak, Milan Vaško
    Abstract:

    Abstract Numerical modeling of thermal phenomena with the motion of fusion zone in the welding pool taken into account is performed in this study for hybrid welding process using Yb:YAG laser with electric arc in GMAW method. New hybrid heat source model is developed on the basis of classical Goldak model for the electric arc and interpolation model for the laser beam with the experimental data of Yb:YAG laser beam distribution taken into account. Temperature field and melted Material Velocity field are calculated on the basis of numerical solution into mass, momentum and energy conservation equations in finite volume method with Chorin's projection method. Computer simulations of temperature field and melted Material Velocity field are performed in the welding pool for different distances between heat sources. The comparison of numerically estimated geometry of characteristic zones of joints with macroscopic pictures of cross sections of welds is made in order to evaluate the suitability of developed numerical model in industrial applications.

  • Comprehensive model of thermal phenomena and phase transformations in laser welding process
    Computers & Structures, 2016
    Co-Authors: Marcin Kubiak, Wiesława Piekarska
    Abstract:

    Prediction of fusion zone and heat affected zone geometry in laser welding process.Estimation of structural composition of the laser welded joint.Considering austenitization temperatures changing with heating rates.Determining the impact of latent heats on the temperature field.Comparison of predicted characteristic zones of joints with experimental results. This paper concerns computational modelling of thermal phenomena and phase transformations in solid state in laser welding process. The analysis is performed on the basis of numerical solution into continuum mechanics governing equations as well as classic Johnson-Mehl-Avrami (JMA) and Koistinen-Marburger (KM) kinetics models with continuous heating transformation (CHT) and continuous cooling transformation (CCT) diagrams of S460 steel. The influence of latent heats on temperature distributions is analysed. Obtained results include temperature field, melted Material Velocity field in the fusion zone and structure composition of welded joint. Calculations are partially verified by experimental data.

  • numerical prediction of fusion zone and heat affected zone in hybrid yb yag laser gmaw welding process with experimental verification
    Procedia Engineering, 2016
    Co-Authors: Marcin Kubiak, Wiesława Piekarska, Z Saternus, T Domanski
    Abstract:

    Abstract This work concerns mathematical and numerical modelling of temperature field during hybrid welding process using Yb:YAG laser and electric arc in GMAW method. Numerical analysis is performed taking into account the motion of liquid steel in the fusion zone. Yb:YAG laser power distribution is determined on the basis of experimental research made on TruDisk 12002 laser. Geostatistical Kriging method is used in the interpolation of Yb:YAG laser power intensity distribution. Temperature field and melted Material Velocity field in the fusion zone of hybrid welded sheets made of S355 steel are obtained on the basis of numerical solution of continuum mechanics equations in Chorin's projection method and finite volume method. Experimental research of laser beam profile is performed in order to verify the correctness of developed heat source model. Fusion zone and heat affected zone geometry is predicted on the basis of calculated temperature field in the cross section of hybrid welded joint.

  • numerical prediction of fusion zone and heat affected zone in hybrid yb yag laser gmaw welding process with experimental verification
    Procedia Engineering, 2016
    Co-Authors: Marcin Kubiak, Wiesława Piekarska, Z Saternus, T Domanski
    Abstract:

    Abstract This work concerns mathematical and numerical modelling of temperature field during hybrid welding process using Yb:YAG laser and electric arc in GMAW method. Numerical analysis is performed taking into account the motion of liquid steel in the fusion zone. Yb:YAG laser power distribution is determined on the basis of experimental research made on TruDisk 12002 laser. Geostatistical Kriging method is used in the interpolation of Yb:YAG laser power intensity distribution. Temperature field and melted Material Velocity field in the fusion zone of hybrid welded sheets made of S355 steel are obtained on the basis of numerical solution of continuum mechanics equations in Chorin's projection method and finite volume method. Experimental research of laser beam profile is performed in order to verify the correctness of developed heat source model. Fusion zone and heat affected zone geometry is predicted on the basis of calculated temperature field in the cross section of hybrid welded joint.

  • three dimensional model for numerical analysis of thermal phenomena in laser arc hybrid welding process
    International Journal of Heat and Mass Transfer, 2011
    Co-Authors: Wiesława Piekarska, Marcin Kubiak
    Abstract:

    Abstract This paper describes mathematical and numerical models of thermal phenomena developed for computational analysis of the laser–arc hybrid welding process. The mathematical and numerical models were established to estimate temperature field and Velocity field of melted Material in the welding pool. Different heat source power distribution models for electric arc and laser beam, latent heat of fusion and latent heat of evaporation as well as buoyancy and liquid Material flow through a porous medium were taken into consideration in the computational model. The results of computer simulation of laser–arc hybrid welding process, including temperature field and melted Material Velocity field, are presented in this study. The correctness of elaborated models is verified by experimental results.

Wiesława Piekarska - One of the best experts on this subject based on the ideXlab platform.

  • Numerical Estimation of the Shape of Weld and Heat Affected Zone in Laser-arc Hybrid Welded Joints
    Procedia Engineering, 2017
    Co-Authors: Wiesława Piekarska, Marcin Kubiak, Milan Vaško
    Abstract:

    Abstract Numerical modeling of thermal phenomena with the motion of fusion zone in the welding pool taken into account is performed in this study for hybrid welding process using Yb:YAG laser with electric arc in GMAW method. New hybrid heat source model is developed on the basis of classical Goldak model for the electric arc and interpolation model for the laser beam with the experimental data of Yb:YAG laser beam distribution taken into account. Temperature field and melted Material Velocity field are calculated on the basis of numerical solution into mass, momentum and energy conservation equations in finite volume method with Chorin's projection method. Computer simulations of temperature field and melted Material Velocity field are performed in the welding pool for different distances between heat sources. The comparison of numerically estimated geometry of characteristic zones of joints with macroscopic pictures of cross sections of welds is made in order to evaluate the suitability of developed numerical model in industrial applications.

  • Comprehensive model of thermal phenomena and phase transformations in laser welding process
    Computers & Structures, 2016
    Co-Authors: Marcin Kubiak, Wiesława Piekarska
    Abstract:

    Prediction of fusion zone and heat affected zone geometry in laser welding process.Estimation of structural composition of the laser welded joint.Considering austenitization temperatures changing with heating rates.Determining the impact of latent heats on the temperature field.Comparison of predicted characteristic zones of joints with experimental results. This paper concerns computational modelling of thermal phenomena and phase transformations in solid state in laser welding process. The analysis is performed on the basis of numerical solution into continuum mechanics governing equations as well as classic Johnson-Mehl-Avrami (JMA) and Koistinen-Marburger (KM) kinetics models with continuous heating transformation (CHT) and continuous cooling transformation (CCT) diagrams of S460 steel. The influence of latent heats on temperature distributions is analysed. Obtained results include temperature field, melted Material Velocity field in the fusion zone and structure composition of welded joint. Calculations are partially verified by experimental data.

  • numerical prediction of fusion zone and heat affected zone in hybrid yb yag laser gmaw welding process with experimental verification
    Procedia Engineering, 2016
    Co-Authors: Marcin Kubiak, Wiesława Piekarska, Z Saternus, T Domanski
    Abstract:

    Abstract This work concerns mathematical and numerical modelling of temperature field during hybrid welding process using Yb:YAG laser and electric arc in GMAW method. Numerical analysis is performed taking into account the motion of liquid steel in the fusion zone. Yb:YAG laser power distribution is determined on the basis of experimental research made on TruDisk 12002 laser. Geostatistical Kriging method is used in the interpolation of Yb:YAG laser power intensity distribution. Temperature field and melted Material Velocity field in the fusion zone of hybrid welded sheets made of S355 steel are obtained on the basis of numerical solution of continuum mechanics equations in Chorin's projection method and finite volume method. Experimental research of laser beam profile is performed in order to verify the correctness of developed heat source model. Fusion zone and heat affected zone geometry is predicted on the basis of calculated temperature field in the cross section of hybrid welded joint.

  • numerical prediction of fusion zone and heat affected zone in hybrid yb yag laser gmaw welding process with experimental verification
    Procedia Engineering, 2016
    Co-Authors: Marcin Kubiak, Wiesława Piekarska, Z Saternus, T Domanski
    Abstract:

    Abstract This work concerns mathematical and numerical modelling of temperature field during hybrid welding process using Yb:YAG laser and electric arc in GMAW method. Numerical analysis is performed taking into account the motion of liquid steel in the fusion zone. Yb:YAG laser power distribution is determined on the basis of experimental research made on TruDisk 12002 laser. Geostatistical Kriging method is used in the interpolation of Yb:YAG laser power intensity distribution. Temperature field and melted Material Velocity field in the fusion zone of hybrid welded sheets made of S355 steel are obtained on the basis of numerical solution of continuum mechanics equations in Chorin's projection method and finite volume method. Experimental research of laser beam profile is performed in order to verify the correctness of developed heat source model. Fusion zone and heat affected zone geometry is predicted on the basis of calculated temperature field in the cross section of hybrid welded joint.

  • three dimensional model for numerical analysis of thermal phenomena in laser arc hybrid welding process
    International Journal of Heat and Mass Transfer, 2011
    Co-Authors: Wiesława Piekarska, Marcin Kubiak
    Abstract:

    Abstract This paper describes mathematical and numerical models of thermal phenomena developed for computational analysis of the laser–arc hybrid welding process. The mathematical and numerical models were established to estimate temperature field and Velocity field of melted Material in the welding pool. Different heat source power distribution models for electric arc and laser beam, latent heat of fusion and latent heat of evaporation as well as buoyancy and liquid Material flow through a porous medium were taken into consideration in the computational model. The results of computer simulation of laser–arc hybrid welding process, including temperature field and melted Material Velocity field, are presented in this study. The correctness of elaborated models is verified by experimental results.

Shiv Brat Singh - One of the best experts on this subject based on the ideXlab platform.

  • Counter rotating twin-tool system in friction stir welding process: A simulation study
    Journal of Materials Processing Technology, 2018
    Co-Authors: Rahul Jain, Kanchan Kumari, Surjya K. Pal, Shiv Brat Singh
    Abstract:

    Abstract In the current paper a comparative study between twin-tool and conventional friction stir welding tool by using a numerical method is carried out based on temperature distribution, strain, Material flow and Material Velocity. The model is validated with experimentally measured temperature for both the cases and a good correlation is observed. Twin-tool generates higher maximum and minimum temperatures over the conventional FSW having a single-tool. Lower thermal gradients along transverse and thickness directions are achieved for twin-tool as compared to the conventional FSW. In twin-tool, strain distribution is symmetric contrary to the asymmetry in conventional FSW. Material deposition is closer to its original location in case of twin-tool as compared to conventional FSW leading to lower chances of defects in the former.

Simon Guerdoux - One of the best experts on this subject based on the ideXlab platform.

  • 3D numerical simulation of the three stages of Friction Stir Welding based on friction parameters calibration
    International Journal of Material Forming, 2008
    Co-Authors: Lionel Fourment, Simon Guerdoux
    Abstract:

    International audienceAn Arbitrary Lagrangian Eulerian (ALE) formulation was developed to simulate the different stages of the Friction Stir Welding (FSW) process with the FORGE3® F.E. software. A splitting method was utilized: a) the Material Velocity/pressure and temperature fields are calculated, b) the mesh Velocity is derived from the domain boundary evolution and an adaptive refinement criterion provided by error estimation, c) P1 and P0 variables are remapped. The proposed ALE formulation is applied to FSW simulation. Steady state welding, but also transient phases are simulated, showing good robustness and accuracy of the developed formulation. Friction parameters are identified for an Eulerian steady state simulation by comparison with experimental results. Simulations of the transient plunge and welding phases help to better understand the deposition process that occurs at the trailing edge of the probe, and in particular possible void formation. Flexibility and robustness of the model allows investigating the influence of threads and tooling designs

  • 3D numerical simulation of the three stages of Friction Stir Welding based on friction parameters calibration
    International Journal of Material Forming, 2008
    Co-Authors: Lionel Fourment, Simon Guerdoux
    Abstract:

    An Arbitrary Lagrangian Eulerian (ALE) formulation was developed to simulate the different stages of the Friction Stir Welding (FSW) process with the FORGE3® F.E. software. A splitting method was utilized: a) the Material Velocity/pressure and temperature fields are calculated, b) the mesh Velocity is derived from the domain boundary evolution and an adaptive refinement criterion provided by error estimation, c) P1 and P0 variables are remapped. The proposed ALE formulation is applied to FSW simulation. Steady state welding, but also transient phases are simulated, showing good robustness and accuracy of the developed formulation. Friction parameters are identified for an Eulerian steady state simulation by comparison with experimental results. Simulations of the transient plunge and welding phases help to better understand the deposition process that occurs at the trailing edge of the probe, and in particular possible void formation. Flexibility and robustness of the model allows investigating the influence of threads and tooling designs.

  • 3D numerical simulation of the three stages of Friction Stir Welding based on friction parameters calibration
    International Journal of Material Forming, 2008
    Co-Authors: Lionel Fourment, Simon Guerdoux
    Abstract:

    An Arbitrary Lagrangian Eulerian (ALE) formulation was developed to simulate the different stages of the Friction Stir Welding (FSW) process with the FORGE3® F.E. software. A splitting method was utilized: a) the Material Velocity/pressure and temperature fields are calculated, b) the mesh Velocity is derived from the domain boundary evolution and an adaptive refinement criterion provided by error estimation, c) P1 and P0 variables are remapped. The proposed ALE formulation is applied to FSW simulation. Steady state welding, but also transient phases are simulated, showing good robustness and accuracy of the developed formulation. Friction parameters are identified for an Eulerian steady state simulation by comparison with experimental results. Simulations of the transient plunge and welding phases help to better understand the deposition process that occurs at the trailing edge of the probe, and in particular possible void formation. Flexibility and robustness of the model allows investigating the influence of threads and tooling designs.

  • Numerical simulation of the friction stir welding process
    2007
    Co-Authors: Simon Guerdoux
    Abstract:

    This work presents the development of a numerical tool. An Arbitrary Lagrangian Eulerian (ALE) formulation is implemented in the 3D FORGE3® F.E. software to simulate the different stages of the Friction Stir Welding (FSW) process. A splitting method is utilized:a) the Material Velocity/pressure and temperature fields are calculated, b) the mesh Velocity is derived from the domain boundary evolution and an adaptive refinement criterion provided by error estimation, c) nodal and P0 variables are remapped. Different Velocity computations and remap techniques are investigated, providing significant advantages with respect to more standard approaches. Improvement is also brought to the contact algorithm through a tool smoothing procedure. These proposed enhancements have been tested and applied on industrial cases.Steady state welding, but also transient welding phases are simulated, exhibiting good robustness and accuracy of the developed ALE formulation. On the first hand, friction parameters are identified using Eulerian steady welding state simulations by comparison with experimental results. On the second hand, one major interest of the ALE model being the possibility to simulate void formation at the tool/workpiece interface, the transient plunge and welding phases are modeled. Their simulations can thus help to better understand the mechanisms of the deposition process that occurs at the trailing edge of the probe in order to obtain sound and defect-free welds. Finally, the flexibility and robustness of the model allows the investigation of new tooling designs influence in the deposition process.

  • Error estimation and accurate mapping based ALE formulation for 3D simulation of friction stir welding
    2007
    Co-Authors: Simon Guerdoux, Lionel Fourment
    Abstract:

    An Arbitrary Lagrangian Eulerian (ALE) formulation is developed to simulate the different stages of the Friction Stir Welding (FSW) process with the FORGE3® F.E. software. A splitting method is utilized: a) the Material Velocity/pressure and temperature fields are calculated, b) the mesh Velocity is derived from the domain boundary evolution and an adaptive refinement criterion provided by error estimation, c) P1 and P0 variables are remapped. Different Velocity computation and remap techniques have been investigated, providing significant improvement with respect to more standard approaches. The proposed ALE formulation is applied to FSW simulation. Steady state welding, but also transient phases are simulated, showing good robustness and accuracy of the developed formulation. Friction parameters are identified for an Eulerian steady state simulation by comparison with experimental results. Void formation can be simulated. Simulations of the transient plunge and welding phases help to better understand the deposition process that occurs at the trailing edge of the probe. Flexibility and robustness of the model finally allows investigating the influence of new tooling designs on the deposition process.

T Domanski - One of the best experts on this subject based on the ideXlab platform.

  • numerical prediction of fusion zone and heat affected zone in hybrid yb yag laser gmaw welding process with experimental verification
    Procedia Engineering, 2016
    Co-Authors: Marcin Kubiak, Wiesława Piekarska, Z Saternus, T Domanski
    Abstract:

    Abstract This work concerns mathematical and numerical modelling of temperature field during hybrid welding process using Yb:YAG laser and electric arc in GMAW method. Numerical analysis is performed taking into account the motion of liquid steel in the fusion zone. Yb:YAG laser power distribution is determined on the basis of experimental research made on TruDisk 12002 laser. Geostatistical Kriging method is used in the interpolation of Yb:YAG laser power intensity distribution. Temperature field and melted Material Velocity field in the fusion zone of hybrid welded sheets made of S355 steel are obtained on the basis of numerical solution of continuum mechanics equations in Chorin's projection method and finite volume method. Experimental research of laser beam profile is performed in order to verify the correctness of developed heat source model. Fusion zone and heat affected zone geometry is predicted on the basis of calculated temperature field in the cross section of hybrid welded joint.

  • numerical prediction of fusion zone and heat affected zone in hybrid yb yag laser gmaw welding process with experimental verification
    Procedia Engineering, 2016
    Co-Authors: Marcin Kubiak, Wiesława Piekarska, Z Saternus, T Domanski
    Abstract:

    Abstract This work concerns mathematical and numerical modelling of temperature field during hybrid welding process using Yb:YAG laser and electric arc in GMAW method. Numerical analysis is performed taking into account the motion of liquid steel in the fusion zone. Yb:YAG laser power distribution is determined on the basis of experimental research made on TruDisk 12002 laser. Geostatistical Kriging method is used in the interpolation of Yb:YAG laser power intensity distribution. Temperature field and melted Material Velocity field in the fusion zone of hybrid welded sheets made of S355 steel are obtained on the basis of numerical solution of continuum mechanics equations in Chorin's projection method and finite volume method. Experimental research of laser beam profile is performed in order to verify the correctness of developed heat source model. Fusion zone and heat affected zone geometry is predicted on the basis of calculated temperature field in the cross section of hybrid welded joint.