Abstract
Previous investigations have been performed that involve developing new ways in which to deform a material while minimizing the energy required to do so. More recent research involves applying an electric current to the workpiece to achieve superplasticity. However, those investigations only utilized uniaxial workpieces and lack the ability to be used for more common geometries. The research presented herein, however, the effect is investigated under three-dimensional conditions so that the results could be projected to more realistic sheet metal geometries. A working finite element analysis (FEA) model has been developed to analyze these more complicated three-dimensional flow fields and will be presented as a part of this research. The model was used to solve for the temperature and current density distributions across the workpiece. The results from the FEA model are compared to results obtained from experimental tests. In the experimental setup, the two dome heights were separately tested under the same conditions that the FEA model simulated, however, only a temperature distribution was obtained here. The comparison of the FEA results and the experimental results related the temperature distribution to the current density distribution across the workpiece. From here, the individual effects of certain parameters on the distributions were found. The parameters included: duration of current, amount of current, electrode placement, and dome height geometry. The results showed that the current density distribution can be manipulated by varying the above parameters. This capability can be used to delay tearing/necking of a sheet metal workpiece under deformation.
| Original language | English (US) |
|---|---|
| Title of host publication | 2008 Proceedings of ASME International Mechanical Engineering Congress and Exposition, IMECE 2008 |
| Pages | 1705-1714 |
| Number of pages | 10 |
| Volume | 10 |
| Edition | PART C |
| DOIs | |
| State | Published - 2009 |
| Event | 2008 ASME International Mechanical Engineering Congress and Exposition, IMECE 2008 - Boston, MA, United States Duration: Oct 31 2008 → Nov 6 2008 |
Other
| Other | 2008 ASME International Mechanical Engineering Congress and Exposition, IMECE 2008 |
|---|---|
| Country | United States |
| City | Boston, MA |
| Period | 10/31/08 → 11/6/08 |
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All Science Journal Classification (ASJC) codes
- Mechanical Engineering
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Transient multi-field FEA model for predicting current density distribution when deforming sheet metal under a direct current. / Roth, John Timothy; Khalilollahi, Amir; Jageman, Daniel J.
2008 Proceedings of ASME International Mechanical Engineering Congress and Exposition, IMECE 2008. Vol. 10 PART C. ed. 2009. p. 1705-1714.Research output: Chapter in Book/Report/Conference proceeding › Conference contribution
TY - GEN
T1 - Transient multi-field FEA model for predicting current density distribution when deforming sheet metal under a direct current
AU - Roth, John Timothy
AU - Khalilollahi, Amir
AU - Jageman, Daniel J.
PY - 2009
Y1 - 2009
N2 - Previous investigations have been performed that involve developing new ways in which to deform a material while minimizing the energy required to do so. More recent research involves applying an electric current to the workpiece to achieve superplasticity. However, those investigations only utilized uniaxial workpieces and lack the ability to be used for more common geometries. The research presented herein, however, the effect is investigated under three-dimensional conditions so that the results could be projected to more realistic sheet metal geometries. A working finite element analysis (FEA) model has been developed to analyze these more complicated three-dimensional flow fields and will be presented as a part of this research. The model was used to solve for the temperature and current density distributions across the workpiece. The results from the FEA model are compared to results obtained from experimental tests. In the experimental setup, the two dome heights were separately tested under the same conditions that the FEA model simulated, however, only a temperature distribution was obtained here. The comparison of the FEA results and the experimental results related the temperature distribution to the current density distribution across the workpiece. From here, the individual effects of certain parameters on the distributions were found. The parameters included: duration of current, amount of current, electrode placement, and dome height geometry. The results showed that the current density distribution can be manipulated by varying the above parameters. This capability can be used to delay tearing/necking of a sheet metal workpiece under deformation.
AB - Previous investigations have been performed that involve developing new ways in which to deform a material while minimizing the energy required to do so. More recent research involves applying an electric current to the workpiece to achieve superplasticity. However, those investigations only utilized uniaxial workpieces and lack the ability to be used for more common geometries. The research presented herein, however, the effect is investigated under three-dimensional conditions so that the results could be projected to more realistic sheet metal geometries. A working finite element analysis (FEA) model has been developed to analyze these more complicated three-dimensional flow fields and will be presented as a part of this research. The model was used to solve for the temperature and current density distributions across the workpiece. The results from the FEA model are compared to results obtained from experimental tests. In the experimental setup, the two dome heights were separately tested under the same conditions that the FEA model simulated, however, only a temperature distribution was obtained here. The comparison of the FEA results and the experimental results related the temperature distribution to the current density distribution across the workpiece. From here, the individual effects of certain parameters on the distributions were found. The parameters included: duration of current, amount of current, electrode placement, and dome height geometry. The results showed that the current density distribution can be manipulated by varying the above parameters. This capability can be used to delay tearing/necking of a sheet metal workpiece under deformation.
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U2 - 10.1115/IMECE2008-67771
DO - 10.1115/IMECE2008-67771
M3 - Conference contribution
SN - 9780791848715
VL - 10
SP - 1705
EP - 1714
BT - 2008 Proceedings of ASME International Mechanical Engineering Congress and Exposition, IMECE 2008
ER -