Abstract
In tube hydroforming, circular components are hydrobulged or hydroformed from tubular blanks with internal pressure and simultaneous axial loading. Thus the tube can be fed into the deformation zone during the bulge operation allowing more expansion and less thinning without any defects such as wrinkling, buckling, and bursting. By contrast with the buckling and the wrinkling, the bursting is generally classified as an irrecoverable failure mode. Hence in order to obtain the sound hydroformed products, it is necessary to predict the bursting behavior and to analyze the effects of process parameters on this failure condition in hydroforming processes. In this study, a forming limit stress diagram (FLSD) is constructed by plotting the calculated principal stresses based on the local necking criterion. Using the theoretical FLSD, we carry out the numerical prediction of bursting failure in a hydroforming process, which usually has non-linear strain path. Finite element analyses are carried out to find out the state of stresses during simple hydroforming operation, in which the FLSD is utilized as the forming limit criterion for assessment of the initiation of necking, and influences of the material parameters on the formability are investigated. In addition, the numerical results obtained from the FEM combined with the FLSD are confirmed with a series of bulge tests in view of bursting pressure and show a good agreement. Consequently, it is shown that the theoretical and numerical approach to bursting failure prediction proposed in this paper will provide a feasible method to satisfy the increasing practical demands for assessment of the forming severity in hydroforming processes.
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References
Kim J, Kim SW, Song WJ, Kang BS (2004) Analytical approach to bursting in tube hydroforming using diffuse plastic instability. Int J Mech Sci 46:1535–1547 DOI 10.1016/j.ijmecsci.2004.09.001
Yamada Y, Aoki I (1966) On the tensile plastic instability in axi-symmetric deformation of sheet metals. J JSTP 67:393–406 (Japanese)
Xing HL, Makinouchi A (2001) Numerical analysis and design for tubular hydroforming. Int J Mech Sci 43:1009–1026 DOI 10.1016/S0020-7403(00)00046-1
Tirosh J, Neuberger A, Shirizly A (1996) On tube expansion by internal fluid pressure with additional compressive stress. Int J Mech Sci 38:839–851 DOI 10.1016/0020-7403(95)00113-1
Xia ZC (2001) Failure analysis of tubular hydroforming. J Eng Mater Technol 123:423–429 DOI 10.1115/1.1394966
Nefussi G, Combescure A (2002) A Coupled buckling and plastic instability for tube hydroforming. Int J Mech Sci 44:899–914 DOI 10.1016/S0020-7403(02)00031-0
Kleemola HJ, Pelkkikangas MT (1977) Effect of predeformation and strain path on the forming limits of steel, copper and brass. Sheet Met Ind 63:591–599
Arrieux R, Bedrin C, Bovin M (1982) Determination of an intrinsic forming limit stress diagram for isotropic metal sheets. Proceedings of the 12th Biennial Congress of the IDDRG 61–71
Stoughton TB (1999) A general forming limit criterion for sheet metal forming. Int J Mech Sci 42:1–27 DOI 10.1016/S0020-7403(98)00113-1
Stoughton TB, Zhu X (2004) Review of theoretical models of the strain-based FLD and their relevance to the stress-based FLD. Int J Plast 20:1463–1486 DOI 10.1016/j.ijplas.2003.11.004
Zimniak Z (2000) Implementation of the forming limit stess diagram in FEM simulations. J Mater Process Technol 106:261–266 DOI 10.1016/S0924-0136(00)00627-0
Hill R (1983) The mathematical theory of plasticity. Oxford University Press, New York
Kim J, Kim YW, Kang BS, Hwang SM (2004) Finite element analysis for bursting failure prediction in bulge forming of a seamed tube. Finite Elem Anal Des 40:953–966 DOI 10.1016/j.finel.2003.05.003
Keeler SP (2000) Forming limits for hydroforming and other simulations. EUROPAM Conference 2000
Belytschko T, Liu WK, Moran B (2000) Nonlinear Finite Elements for Continua and Structures. Wiley, London
Nguyen BN, Johnson KI, Khaleel MA (2003) Analysis of tube hydroforming using an inverse approach with FLD-based adjustment of process parameters. J Eng Mater Technol 125:133–140 DOI 10.1115/1.1555651
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Kim, SW., Song, WJ., Kang, BS. et al. Bursting failure prediction in tube hydroforming using FLSD. Int J Adv Manuf Technol 41, 311–322 (2009). https://doi.org/10.1007/s00170-008-1488-3
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DOI: https://doi.org/10.1007/s00170-008-1488-3