Issue 45

G. Giuliano et alii, Frattura ed Integrità Strutturale, 45 (2018) 164-172; DOI: 10.3221/IGF-ESIS.45.14 172 Figure 13 : Comparison between the force-stroke curves of the punch, obtained by FEM-2D, under different friction conditions, until the sheet instability occurring R EFERENCES [1] Hu, Q., Zhang, F., Li, X. and Chen, J. (2018). Overview on the Prediction Models for Sheet Metal Forming Failure: Necking and Ductile Fracture, Acta Mech. Solida Sin., 31 (3), pp. 259-289. DOI:10.1007/s10338-018-0026-6. [2] Bouktir, Y., Chalal, H. and Abed-Meraim, F. (2018). Prediction of necking in thin sheet metals using an elastic– plastic model coupled with ductile damage and bifurcation criteria, Int. J. Damage. Mech., 27(6), pp. 801-839. DOI: 10.1177/1056789517704030. [3] Bellini, C., Giuliano, G. and Sorrentino, L. (2015). Free bulging at constant pressure of superplastic sheet metal, Int. J. Eng. Techn., 7(4), pp. 1173-1178. [4] Banabic, D., Lazarescu, L., Paraianu, L., Ciobanu, I., Nicodim, I. and Comsa, D. (2013). Development of a new procedure for the experimental determination of the forming limit curves, CIRP Ann.-Manuf. Techn., 62(1), pp. 255–258, 2013. DOI: 10.1016/j.cirp.2013.03.051 [5] Swift, H.W. (1952). Plastic instability under plane stress, J. Mech. Phys. Solids, 1(1), pp. 1–18. DOI: 10.1016/0022-5096(52)90002-1. [6] Hill, R. (1952). On discontinuous plastic states with special reference to localized necking in thin sheets, J. Mech. Phys. Solids, 1(1), pp. 19–30. DOI: 10.1016/0022-5096(52)90003-3 [7] Marciniak, Z. (1965). Stability of plastic shells under tension with kinematic boundary condition, Arch. Mech., 17, pp. 577–592. [8] Situ, Q., Jain, M. and Metzger, D. (2011). Determination of forming limit diagrams of sheet materials with a hybrid experimental-numerical approach, Int. J. Mech. Sci., 53(4), pp. 707–719. DOI: 10.1016/j.ijmecsci.2011.06.003. [9] Banabic, D. (2010). Sheet Metal Forming Processes Constitutive Modelling and Numerical Simulation, Berlin, Springer. DOI: 10.1007/978-3-540-88113-1. [10] Giuliano, G. (2012). Influence of the Metal Sheet Parameters on the Results of the Erichsen Test, Appl. Mech. Mater., 217-219, pp. 2444-2447. DOI: 10.4028 /www.scientific.net/AMM.217-219.2444. [11] Giuliano, G. (2015). Evaluation of the Coulomb Friction Coefficient in DC05 Sheet Metal Forming, Stroj. Vestn.-J. Mech. E., 61(12), pp. 709-713. DOI: 10.5545/sv-jme.2015.2733.