Thermo-mechanical Modeling of Friction Welding
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In friction welding heat is generated through mechanical friction between a moving workpiece and a stationary component, with the addition of a lateral force to plastically displace and fuse the materials. During the process no melting occurs. The main benefit of this technique is that it allows materials with very different physical and mechanical properties to be joined. The technique has many applications in the aerospace, nuclear and oil industries [1].
In this News, we present the numerical simulation of friction welding between aluminum and corundum ceramic (Al2O3) rods [2]. A schematic of the physical problem is depicted in Figure 1.
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Figure 1 Schematic of the physical problem
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The two rods are modeled as axisymmetric solids. The model is subjected to a time varying angular velocity and axial pressure. The ceramic is considered an elastic material and the aluminum a thermo-elasto-plastic material with temperature-dependent work hardening. The animations above show the evolution of the temperature field, contact tractions and deformations of the rods during the welding process. The nonuniformity of the contact tractions and temperature distribution at the interface during the welding process are noteworthy. Figure 2 shows the nonuniformity of the heat flux at the interface as a function of the radial coordinate at one point in time during welding.
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Figure 2 Distribution of heat flux at the interface
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ure 3 Variation of the coefficient of friction at the interface with temperature
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In this study, the full coupling between the temperature and deformation fields is taken into account using the staggered solution scheme available in ADINA; for details see ref. [2]. Figure 4 shows the deformation profile of the aluminum rod obtained using the numerical analysis (left) and physical experiment (right). Excellent correspondence is seen.
Figure 4 Deformation profile of the aluminum rod
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This problem solution demonstrates some of the many powerful capabilities available in ADINA to solve problems involving full coupling between mechanical deformations and temperature fields. For more information on the modeling of such problems, see Thermo-mechanical Coupling Capabilities.
References
Wikipedia article on Friction Welding
For more physical insight, see also this Youtube video.
J. Zimmerman, W. Wlosinski, Z.R. Lindemann, "Thermo-mechanical and diffusion modeling in the process of ceramic-metal friction welding", Journal of Materials Processing Technology, 209: 1644-1653, 2009.
Keywords:
Friction welding, thermo-mechanical coupling, aluminum, ceramic, contact, thermo-elasto-plastic material, aerospace industry, oil industry, nuclear industry
Courtesy of J. Zimmerman, W. Wlosinski and Z.R. Lindemann, Warsaw University of Technology
Thermo-mechanical Modeling of Friction Welding
In friction welding heat is generated through mechanical friction between a moving workpiece and a stationary component, with the addition of a lateral force to plastically displace and fuse the materials. During the process no melting occurs. The main benefit of this technique is that it allows materials with very different physical and mechanical properties to be joined. The technique has many applications in the aerospace, nuclear and oil industries [1].
In this News, we present the numerical simulation of friction welding between aluminum and corundum ceramic (Al2O3) rods [2]. A schematic of the physical problem is depicted in Figure 1.
Figure 1 Schematic of the physical problem
The two rods are modeled as axisymmetric solids. The model is subjected to a time varying angular velocity and axial pressure. The ceramic is considered an elastic material and the aluminum a thermo-elasto-plastic material with temperature-dependent work hardening.
The animations above show the evolution of the temperature field, contact tractions and deformations of the rods during the welding process. The nonuniformity of the contact tractions and temperature distribution at the interface during the welding process are noteworthy. Figure 2 shows the nonuniformity of the heat flux at the interface as a function of the radial coordinate at one point in time during welding.
Figure 2 Distribution of heat flux at the interface
ure 3 Variation of the coefficient of friction at the interface with temperature
In this study, the full coupling between the temperature and deformation fields is taken into account using the staggered solution scheme available in ADINA; for details see ref. [2]. Figure 4 shows the deformation profile of the aluminum rod obtained using the numerical analysis (left) and physical experiment (right). Excellent correspondence is seen.
Figure 4 Deformation profile of the aluminum rod
This problem solution demonstrates some of the many powerful capabilities available in ADINA to solve problems involving full coupling between mechanical deformations and temperature fields. For more information on the modeling of such problems, see Thermo-mechanical Coupling Capabilities.
References
Wikipedia article on Friction Welding
For more physical insight, see also this Youtube video.
J. Zimmerman, W. Wlosinski, Z.R. Lindemann, "Thermo-mechanical and diffusion modeling in the process of ceramic-metal friction welding", Journal of Materials Processing Technology, 209: 1644-1653, 2009.
Keywords:
Friction welding, thermo-mechanical coupling, aluminum, ceramic, contact, thermo-elasto-plastic material, aerospace industry, oil industry, nuclear industry
Courtesy of J. Zimmerman, W. Wlosinski and Z.R. Lindemann, Warsaw University of Technology