Abstract
This study numerically investigated the effects of process parameter variations such as blank holder forces (800kN-1200kN), strain rates (0.00 13/sec, 0.013/sec, 0.13/sec), coefficient of friction (0.05-0.15), temperature (150°C, 260°C) and apex angles (0°, 60°, 90°, 120°) on warm hydroforming of AA 5754-O sheet blanks. Warm hydroforming process was simulated through hydraulic bulge test with circular and elliptical die openings. Dome height and sheet thinning were selected as control parameters for formability of AA 5754-O sheet blanks. Results showed that the dome height and formed blank thicknesses did not change significantly with the variation of coefficient of friction and blank holder force. Moreover, increasing forming temperature and non-isothemial conditions yielded slightly better formability. On the other hand, increase in strain rate, and elliptical type of bulge test cavity led to significant decreases in dome height and formed part thinning. Another significant finding was that the elliptical bulge test model and isothermal analyses did not reveal the effect of anisotropy for the sheet material concerned.
| Original language | English |
|---|---|
| Title of host publication | Sheet Metal 2011, SheMet 2011 |
| Pages | 594-601 |
| Number of pages | 8 |
| Volume | 473 |
| DOIs | |
| Publication status | Published - 2011 |
| Externally published | Yes |
| Event | 14th International Conference on Sheet Metal, SheMet 2011 - Leuven, Belgium Duration: 18 Apr 2011 → 20 Apr 2011 |
Publication series
| Name | Key Engineering Materials |
|---|---|
| Volume | 473 |
| ISSN (Print) | 10139826 |
Other
| Other | 14th International Conference on Sheet Metal, SheMet 2011 |
|---|---|
| Country | Belgium |
| City | Leuven |
| Period | 18/4/11 → 20/4/11 |
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Keywords
- AA5754-O
- Elliptic bulge test
- Finite element analysis
- Radial basis network
- Warm hydroforming
ASJC Scopus subject areas
- Materials Science(all)
- Mechanics of Materials
- Mechanical Engineering
Cite this
Parametric investigation of circular and elliptical bulge tests in warm hydroforming process for AA5754-O sheet. / Gedikli, Hasan; Cora, Ömer Necati; Koç, Muammer.
Sheet Metal 2011, SheMet 2011. Vol. 473 2011. p. 594-601 (Key Engineering Materials; Vol. 473).Research output: Chapter in Book/Report/Conference proceeding › Conference contribution
}
TY - GEN
T1 - Parametric investigation of circular and elliptical bulge tests in warm hydroforming process for AA5754-O sheet
AU - Gedikli, Hasan
AU - Cora, Ömer Necati
AU - Koç, Muammer
PY - 2011
Y1 - 2011
N2 - This study numerically investigated the effects of process parameter variations such as blank holder forces (800kN-1200kN), strain rates (0.00 13/sec, 0.013/sec, 0.13/sec), coefficient of friction (0.05-0.15), temperature (150°C, 260°C) and apex angles (0°, 60°, 90°, 120°) on warm hydroforming of AA 5754-O sheet blanks. Warm hydroforming process was simulated through hydraulic bulge test with circular and elliptical die openings. Dome height and sheet thinning were selected as control parameters for formability of AA 5754-O sheet blanks. Results showed that the dome height and formed blank thicknesses did not change significantly with the variation of coefficient of friction and blank holder force. Moreover, increasing forming temperature and non-isothemial conditions yielded slightly better formability. On the other hand, increase in strain rate, and elliptical type of bulge test cavity led to significant decreases in dome height and formed part thinning. Another significant finding was that the elliptical bulge test model and isothermal analyses did not reveal the effect of anisotropy for the sheet material concerned.
AB - This study numerically investigated the effects of process parameter variations such as blank holder forces (800kN-1200kN), strain rates (0.00 13/sec, 0.013/sec, 0.13/sec), coefficient of friction (0.05-0.15), temperature (150°C, 260°C) and apex angles (0°, 60°, 90°, 120°) on warm hydroforming of AA 5754-O sheet blanks. Warm hydroforming process was simulated through hydraulic bulge test with circular and elliptical die openings. Dome height and sheet thinning were selected as control parameters for formability of AA 5754-O sheet blanks. Results showed that the dome height and formed blank thicknesses did not change significantly with the variation of coefficient of friction and blank holder force. Moreover, increasing forming temperature and non-isothemial conditions yielded slightly better formability. On the other hand, increase in strain rate, and elliptical type of bulge test cavity led to significant decreases in dome height and formed part thinning. Another significant finding was that the elliptical bulge test model and isothermal analyses did not reveal the effect of anisotropy for the sheet material concerned.
KW - AA5754-O
KW - Elliptic bulge test
KW - Finite element analysis
KW - Radial basis network
KW - Warm hydroforming
UR - http://www.scopus.com/inward/record.url?scp=79955037313&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=79955037313&partnerID=8YFLogxK
U2 - 10.4028/www.scientific.net/KEM.473.594
DO - 10.4028/www.scientific.net/KEM.473.594
M3 - Conference contribution
SN - 9783037850831
VL - 473
T3 - Key Engineering Materials
SP - 594
EP - 601
BT - Sheet Metal 2011, SheMet 2011
ER -