A reliability study of springback on the sheet metal forming process under probabilistic variation of prestrain and blank holder force
- 240 Downloads
This work deals with a reliability assessment of springback problem during the sheet metal forming process. The effects of operative parameters and material properties, blank holder force and plastic prestrain, on springback are investigated. A generic reliability approach was developed to control springback. Subsequently, the Monte Carlo simulation technique in conjunction with the Latin hypercube sampling method was adopted to study the probabilistic springback. Finite element method based on implicit/explicit algorithms was used to model the springback problem. The proposed constitutive law for sheet metal takes into account the adaptation of plastic parameters of the hardening law for each prestrain level considered. Rackwitz-Fiessler algorithm is used to find reliability properties from response surfaces of chosen springback geometrical parameters. The obtained results were analyzed using a multi-state limit reliability functions based on geometry compensations.
KeywordsSpringback Prestrain Multi-state limit functio Constitutive law Monte Carl
Unable to display preview. Download preview PDF.
- 1.Lemaire, M.: Fiabilité des Structures, Couplage Méano-fiabiliste Statique. Hermès Science Publishing LTD (2005) (in French)Google Scholar
- 4.Gati, W.: Approche pseudo inverse pour simulations rapides du procédé d’emboutissage et de retour élastique des pièces en tóles minces. [Ph.D. Thesis], UTC, France (2002) (in French)Google Scholar
- 9.Verma, R.K., Chung, K., Kuwabara, T.: Effect of pre-strain on anisotropic hardening and springback behavior of an ultra low carbon automotive steel. I.S.I.J. International 51, 482–490 (2011)Google Scholar
- 10.Makinouchi, A., Nakamachi, E., Onate Wagoner, R.H.: Numerical simulation of 3D sheet forming processes. Verification of simulation with experiment. In: Proceedings of 2nd International Numisheet’93, Isehara Japan (1993)Google Scholar
- 14.Geng, L., Wagoner, R.H.: Springback analysis with a modified hardening model. S.A.E. Tech. Pap. Ser. No. 2000-01-0768 (2000)Google Scholar
- 20.Mrad, H., Rachik, M., Marceau, D.: The probabilistic numerical investigation of the frictional contact problem. In: Proc. of 4th International Conference on Advances in Mechanical Engineering and Mechanics, Boussaa Publishing Co. Sousse, Tunisia (2008)Google Scholar
- 21.Bjerager, R.: Methods for structural reliability computation, In: Casciati F, ed. Reliability Problems: General Principles and Applications in Mechanics of Solid and Structures. Springer Verlag, New York, 89–136 (1991)Google Scholar