This paper describes an inverse approach (IA) formulation for the analysis of tubes under free hydroforming conditions. The IA formulation is derived from that of Guo et al. established for flat sheet hydroforming analysis using constant strain triangular membrane elements. First, an incremental analysis of free hydroforming for a hot-dip galvanized (HG/Z140) DP600 tube is performed using the Marc finite element code. The deformed geometry obtained at the last converged increment is then used as the final configuration in the inverse analysis. This comparative study allows an assessment of the predictive capability of the inverse analysis. The results are compared with the experimental values determined by Asnafi and Skogsga¨rdh. After that, a procedure based on a forming limit diagram (FLD) is described as a means to adjust the process parameters such as the axial feed and internal pressure. Finally, the adjustment process is illustrated through a re-analysis of the same tube using the inverse approach.
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e-mail: ba.nguyen@pnl.gov
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April 2003
Technical Papers
Analysis of Tube Free Hydroforming Using an Inverse Approach With FLD-Based Adjustment of Process Parameters1
Ba Nghiep Nguyen,
e-mail: ba.nguyen@pnl.gov
Ba Nghiep Nguyen
Computational Mechanics and Material Behavior Group, Pacific Northwest National Laboratory, Richland, WA 99352
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Kenneth I. Johnson,
Kenneth I. Johnson
Computational Mechanics and Material Behavior Group, Pacific Northwest National Laboratory, Richland, WA 99352
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Mohammad A. Khaleel
Mohammad A. Khaleel
Computational Mechanics and Material Behavior Group, Pacific Northwest National Laboratory, Richland, WA 99352
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Ba Nghiep Nguyen
Computational Mechanics and Material Behavior Group, Pacific Northwest National Laboratory, Richland, WA 99352
e-mail: ba.nguyen@pnl.gov
Kenneth I. Johnson
Computational Mechanics and Material Behavior Group, Pacific Northwest National Laboratory, Richland, WA 99352
Mohammad A. Khaleel
Computational Mechanics and Material Behavior Group, Pacific Northwest National Laboratory, Richland, WA 99352
Contributed by the Materials Division for publication in the JOURNAL OF ENGINEERING MATERIALS AND TECHNOLOGY. Manuscript received by the Materials Division February 25, 2002; revision received August 12, 2002. Associate Editor: H. Zbib.
J. Eng. Mater. Technol. Apr 2003, 125(2): 133-140 (8 pages)
Published Online: April 4, 2003
Article history
Received:
February 25, 2002
Revised:
August 12, 2002
Online:
April 4, 2003
Citation
Nguyen, B. N., Johnson , K. I., and Khaleel, M. A. (April 4, 2003). "Analysis of Tube Free Hydroforming Using an Inverse Approach With FLD-Based Adjustment of Process Parameters." ASME. J. Eng. Mater. Technol. April 2003; 125(2): 133–140. https://doi.org/10.1115/1.1555651
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