This paper presents a computational tool for the analysis of freely hydroformed tubes by means of an inverse approach. The formulation of the inverse method developed by Guo et al. [1] is adopted and extended to the tube hydroforming problems in which the initial geometry is a round tube submitted to hydraulic pressure and axial feed at the tube ends (end-feed). A simple criterion based on a forming limit diagram is used to predict the necking regions in the deformed workpiece. Although the developed computational tool is a stand-alone code, it has been linked to the Marc finite element code for meshing and visualization of results. The application of the inverse approach to tube hydroforming is illustrated through the analyses of the aluminum alloy AA6061-T4 seamless tubes under free hydroforming conditions. The results obtained are in good agreement with those issued from a direct incremental approach. However, the computational time in the inverse procedure is much less than that in the incremental method.
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Analysis of Tube Hydroforming by Means of an Inverse Approach1
Ba Nghiep Nguyen,
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
Search for other works by this author on:
Ba Nghiep Nguyen
Computational Mechanics and Material Behavior Group, Pacific Northwest National Laboratory, Richland, WA 99352
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 Manufacturing Engineering Division for publication in the JOURNAL OF MANUFACTURING SCIENCE AND ENGINEERING. Manuscript received September 2001; Revised November 2002. Associate Editor: S. Schmid.
J. Manuf. Sci. Eng. May 2003, 125(2): 369-377 (9 pages)
Published Online: April 15, 2003
Article history
Received:
September 1, 2001
Revised:
November 1, 2002
Online:
April 15, 2003
Citation
Nguyen , B. N., Johnson , K. I., and Khaleel, M. A. (April 15, 2003). "Analysis of Tube Hydroforming by Means of an Inverse Approach." ASME. J. Manuf. Sci. Eng. May 2003; 125(2): 369–377. https://doi.org/10.1115/1.1559166
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