The numerical investigation of the material behavior of high strength sheet materials in incremental forming

Badr, Ossama Mamdouh; Rolfe, Bernard; Hodgson, Peter; Weiss, Matthias
May 2013
AIP Conference Proceedings;May2013, Vol. 1532 Issue 1, p513
Academic Journal
Springback is an inevitable phenomenon in sheet metal forming and has been found to reduce with an increasing number of forming steps. In this study the effect of incremental forming on springback is analyzed for DP780 steel. The cyclic hardening characteristics of the DP780 steel are determined by fitting the experimental moment curvature data of a cyclic pure bending test using Abaqus Standard. The change in elastic modulus with pre-strain is also considered in the material model. Using the developed material model a V- die forming process is numerically analyzed for single and multiple-step forming, and the effect on springback determined. The numerical results show that there is a reduction in springback with an increasing number of forming steps, and that this may be due to the plastic strain accumulated in the blank during the sequential loading steps in the bending region. A very good agreement has been achieved between the simulation and the experimental results. The present study seems to offer an effective approach to increase the accuracy of the springback prediction and provide a greater insight into the nature of the springback in the incremental forming process.


Related Articles

  • Advanced material testing in support of accurate sheet metal forming simulations. Kuwabara, Toshihiko // AIP Conference Proceedings;May2013, Vol. 1532 Issue 1, p69 

    This presentation is a review of experimental methods for accurately measuring and modeling the anisotropic plastic deformation behavior of metal sheets under a variety of loading paths: biaxial compression test, hydraulic bulge test, biaxial tension test using a cruciform specimen, multiaxial...

  • Determination of the Forming Limit Diagram of an Ultra-Thin Ferritic Stainless Steel Sheet. Bong, Hyuk Jong; Barlat, Frédéric; Lee, Myoung-Gyu // AIP Conference Proceedings;8/22/2011, Vol. 1383 Issue 1, p815 

    The forming limit diagram (FLD) of a 98 μm-thick ferritic stainless steel sheet sample was determined using a modified Marciniak test and the conventional Nakazima test (ASTM E2218-2). Wrinkling and undesired fracture were not observed in the modified Marciniak test. However, for some strain...

  • Study for Sheared Edge Quality of High Strength Steel Sheet. Soo Sik Han // Key Engineering Materials;2014, Vol. 626, p252 

    The empirical approach was adopted to investigate the process parameters that effect on the quality of high strength steel sheet sheared edge. As a result of study, the quality of sheared edge that can be represented as the ratio of the shiny burnished surface to the sheared surface was not...

  • An Anisotropic Hardening Model for Springback Prediction. Zeng, Danielle; Xia, Z. Cedric // AIP Conference Proceedings;2005, Vol. 778 Issue 1, p241 

    As more Advanced High-Strength Steels (AHSS) are heavily used for automotive body structures and closures panels, accurate springback prediction for these components becomes more challenging because of their rapid hardening characteristics and ability to sustain even higher stresses. In this...

  • Finite Element Technology In Forming Simulations — Theoretical Aspects And Practical Applications Of A New Solid-Shell Element. Schwarze, M.; Reese, S. // AIP Conference Proceedings;2007, Vol. 908 Issue 1, p1513 

    Finite element simulations of sheet metal forming processes are highly non-linear problems. The non-linearity arises not only from the kinematical relations and the material formulation, furthermore the contact between workpiece and the forming tools leads to an increased number of iterations...

  • Springback Simulation of High Strength Steel Sheet using Local Interpolation for Tool Surfaces. Hama, Takayuki; Teodosiu, Cristian; Makinouchi, Akitake; Fujimoto, Hitoshi; Takuda, Hirohiko // AIP Conference Proceedings;2007, Vol. 908 Issue 1, p805 

    This paper presents the effect of tool modelling accuracy on the simulation accuracy of springback in high strength steels. Simulations of a two-dimensional draw-bending process are carried out by using a polyhedral tool model whose surface is approximated by a polyhedron, and a model whose...

  • Estimation of admissible loads upon a pipeline in the zone of sliding ground. Kryzhanivs'kyi, E. I.; Rudko, V. P.; Shats'kyi, I. P. // Materials Science;Jul2004, Vol. 40 Issue 4, p547 

    We propose a computational scheme for the evaluation of admissible arbitrarily oriented loads acting upon a pipe in the zone of sliding ground.

  • Numerical-experimental comparison study regarding single point incremental forming process. Oleksik, Valentin; Pascu, Adrian; Roca, Liviu; Bondrea, Ioan // AIP Conference Proceedings;May2013, Vol. 1532 Issue 1, p532 

    The paper presents a comparison study based on the numerical simulation with the finite element method (using the Ls-Dyna software) of incremental sheet metal forming and experimental researches regarding the same process. For this comparison study we selected four different shell formulations:...

  • A User-friendly 3D Yield Function for Steel Sheets and Its Application. Yoshida, Fusahito; Tamura, Shohei; Uemori, Takeshi; Hamasaki, Hiroshi // AIP Conference Proceedings;8/22/2011, Vol. 1383 Issue 1, p807 

    A 6th-order polynomial type 3D yield function, which has a high flexibility of describing anisotropic behavior of steel sheets is proposed. A user-friendly scheme of material parameter identification for the model, where only limited experimental data of r-values and yield stresses in three...


Read the Article


Sorry, but this item is not currently available from your library.

Try another library?
Sign out of this library

Other Topics