This content is not included in
your SAE MOBILUS subscription, or you are not logged in.
Analytical Modeling Of Hydroforming Pre-Bend Process: Without Inner Mandrel
Technical Paper
2004-01-0831
ISSN: 0148-7191, e-ISSN: 2688-3627
Annotation ability available
Sector:
Language:
English
Abstract
The aim of this study is to develop an analytical solution to the deformation profile of hydroforming pre-bend process, which will be in turn fed into finite element simulation code for subsequent hydroforming simulation. The conventional approach of using FEM to simulate pre-bending is extremely time consuming in terms of both CAE work and computer running, and can not meet the cycle time required for product development and manufacturing. This is part of a series work for pre-bend modeling, with the focus here on the practice without the use of an inner mandrel, and the tube is free to ovalize during the process. Since only a portion of the tube is undergoing the bending operation, the ovalization magnitude of the tube cross-section is not longitudinally uniform due to the end constraints provided by the undeformed portion of the tube. A large deformation elastoplastic analysis is presented, with the anisotropic plastic behavior of the tube sheet accounted for through the constitutive model. Deformation modes associated with tube ovalization and beam bending are analyzed. The actual deformation is determined by minimizing the total work done during the bending process. Numerical examples are presented for a series of tube geometries and bending curvature to illustrate the proposed approach.
Recommended Content
Authors
Citation
Pavlovskaia, E. and Xia, Z., "Analytical Modeling Of Hydroforming Pre-Bend Process: Without Inner Mandrel," SAE Technical Paper 2004-01-0831, 2004, https://doi.org/10.4271/2004-01-0831.Also In
References
- Brazier, L.G. On flexure of thin cylindrical shells and other thin sections Proc. R. Soc. Lond., Ser. A 1927 116 104 114
- Wu, L. Yu, Y. Computer simulations of forming automotive structural parts by hydroforming process Proceedings of the 3 rd International Conference NUMISHEET'96:: Numerical Simulation of 3-D Sheet Metal Forming Process Dearborn, Michigan 1996 324 329
- Neugebauer, R. Putz, M. Leihkauf, J. Continuous simulation of hydroforming Hydroforming of Tubes, Extrusions and Sheet Metals Siegert Klaus 1999 201 219
- Sibun, A. Cold bending of aluminum tubes and sections Aluminum Industry 1991 10 2 35 37
- Al-Qureshi, H.A. Elastic-plastic analysis of tube bending Int. J. mach. Tools & manufacture 1999 39 87 104
- Calladine, C.R. Theory of Shell Structures Cambridge University Press 1983
- Reddy, B.D. An experimental study of the plastic buckling of circular cylinders in pure bending Int. J. Solids Struc. 1979 15 669 683
- Gellin, S. The plastic buckling of long cylindrical shells under pure bending Int. J. Solids Struc. 1980 16 397 407
- Zhang, L.C. Yu, T.X. An investigation of the Brazier effect of a cylindrical tube under pure elastic-plastic bending Int. J. pres. Ves. & Piping 1987 30 77 86
- Pan, K. Stelson, K.A. On the plastic deformation of a tube during bending J. Engr. For Industry 1995 117 494 500
- Wierzbicki, T. Sinmao, M. A simplified model of Brazier effet in plastic bending of cylindrical tubes Int. J. pres. Ves. & Piping 1997 71 19 28
- Welo, T. Paulsen, F. Brobak, T.J. The behavior of thin-walled, aluminum alloy profiles in rotary draw bending - a comparison between numerical and experimental results J. Mater. Process. Technol 1994 45 173 180
- Hill, R. The Mathematical Theory of Plasticity Oxford University press 1950
- Wang, F. Kiuchi, M. nakata, I. FEM simulation of roll-forming process of ERW pipe by flexible forming mill Proc. Tube and Pipe Dynamics: A Look Ahead Toronto June 9-12 1998
- Press, W.H. Flannery, B.P. Teukolsky, S.A. Vetterling, W.T. Numerical Recipes Cambridge University Press 1986