Finite Element Modeling and Numerical Simulation of Superplastic Forming of 8090 Al-Li Alloy in a Rectangular Die

Abstract:

Superplasticity is a physical phenomenon associated with certain polycrystalline materials which exhibit very high tensile elongation prior to fracture under particular conditions of strain rate and temperature. Aluminium alloy undergoes superplastic elongation in the order of a few thousands percent in elongation with low flow stresses. Superplastic forming processes can provide products with integral structure, light weight and superior strength, all of which are of particular importance for aerospace and automotive components. In the present study an analytical model was developed for a rectangular component by considering constant strain rate. This paper attempts to explore the superplastic behaviors of 8090 Al-Li alloy sheet into a rectangular die using blow forming technique. This has been done by a simple theoretical model and by numerical simulation using standard finite element code ABAQUS. The numerical and analytical results agree reasonably well for both the analytical and theoretical values with regard to variation in pressure and time.

• Periodical: Advanced Materials Research (Volume 487)
• Pages: 116-121
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.487.116
• Online since: March 2012
• Authors: M. Balasubramanian, K. Ramanathan, Ke Zhu
• Keywords: Bulge Forming, Finite Element Method (FEM), Geometric Model, Strain Rate, Superplastic Forming

References

[1] S.G. Luckey Jr,P.A. Friedman K.J. Weinmann, Correlation of finite element analysis to superplastic forming experiments, J. Mat. Processing Technology 194, 2007, pp.30-37.

DOI: 10.1016/j.jmatprotec.2007.03.122

[2] F. Jovane, An approximate analysis of the superplastic forming of a thin circular diaphragm. Theory and Experiments, Int.J. mech. Science, Vol10, 1968, pp.403-427.

DOI: 10.1016/0020-7403(68)90005-2

[3] R.A. vasin,F.U. Enikeev,M. Tokuda,. Mathematical modeling of the superplastic forming of a long rectangular sheet, Int. J of Non-Linear Mechanics 38, pp.799-807.

DOI: 10.1016/s0020-7462(01)00134-2

[4] A.K. Ghosh C.H. Hamilton, superplastic forming of a long rectangular box section analysis and experiment, modeling fundamentals and applications to metals, ASM, Metals Park, OH, USA, 1980, pp.303-329.

[5] Y.M. hwang, J.S. Yang, T.R. Chen, J.C. Huang, Analysis of superplastic sheet metal forming in circular closed die considering non uniform thinning, J. Mat. Processing technology 65, 1997, pp.215-227.

DOI: 10.1016/s0924-0136(96)02265-0

[6] Y.M. Hwang H.S. Lay, Study on superplastic blow-forming in a rectangular closed-die, Journal of Materials Processing Technology, 140, 2003, pp.426-431.

DOI: 10.1016/s0924-0136(03)00729-5

[7] V.S. Senthilkumar, D. Viswanathan,S. Natarajan. Theoretical prediction and FEM analysis of superplastic forming of AA7475 aluminum alloy in a hemispherical die, Journals of Materials Process Technology, 173, (2006), 247-251.

DOI: 10.1016/j.jmatprotec.2005.04.112

[8] M. Balasubramanian, V.S. Senthilkumar, D. Viswanathan,S. Natarajan.; Theoretical modeling and numerical simulation of superplastic forming of 8090Al-Li alloy in a long Rectangular die, in paper presented and published for national conference on CAMMT -2004, IIT madras, Chennai-36, 2004, pp.97-102.