[en] A characteristic of incremental sheet metal forming is that much higher deformations
can be achieved than conventional forming limits. In this paper it is investigated to which extent
the highly non-monotonic strain paths during such a process may be responsible for this high
formability. A Marciniak-Kuczynski (MK) model is used to predict the onset of necking of a
sheet subjected to the strain paths obtained by finite-element simulations. The predicted forming
limits are considerably higher than for monotonic loading, but still lower than the experimental
ones. This discrepancy is attributed to the strain gradient over the sheet thickness, which is not
taken into account in the currently used MK model.
Disciplines :
Materials science & engineering
Author, co-author :
Van Bael, A.
Eyckens, P.
He, S.
Bouffioux, Chantal ; Université de Liège - ULiège > Département Argenco : Secteur MS2F > Département Argenco : Secteur MS2F
Henrard, Christophe ; Université de Liège - ULiège > Département Argenco : Secteur MS2F > Département Argenco : Secteur MS2F
Habraken, Anne ; Université de Liège - ULiège > Département ArGEnCo > Département ArGEnCo
Duflou, J.
Van Houtte, P.
Language :
English
Title :
Forming limit predictions for single-point incremental sheet metal forming
Publication date :
2007
Event name :
10th ESAFORM conference on material forming
Event place :
Zaragosa, Spain
Event date :
du 18 au 20 avril 2007
Audience :
International
Main work title :
Proceedings of the 10th International ESAFORM Conference on Material Forming
J. Jeswiet, F. Micari, G. Hirt, A. Bramley, J. Duflou and J. Allwood, CIRP Annals 54/2, 623-650 (2005).
M.S. Shim and J.J. Park, Journal of Materials Processing Technology 113, 654-658 (2001).
P. Flores, L. Duchêne, C. Bouffioux, T. Lelotte, C. Henrard, N. Pernin, A. Van Bael, S. He, J. Duflou, A.M. Habraken, International Journal of Plasticity 13, 420-449 (2007).
S. He, A. Van Bael and P. Van Houtte, Materials Science Forum 495-497, 1573-1578 (2005).
J. Duflou, A. Szekeres and P. Vanherck, Advanced Materials Research 6-8, 441-448 (2005).
P. Flores, P. Moureaux, A.M. Habraken, Advances in Experimental Mechanics IV 3-4, 91-97 (2005).
P. Van Houtte and A. Van Bael, Int. J. Plasticity 20, 1505-1524 (2004).
S. He, A. Van Bael, P. Van Houtte, A. Szekeres, J. Duflou, C. Henrard and A.M. Habraken, Advanced Materials Research 6-8, 525-532 (2005).
Z. Marciniak and K. Kuczynski, Int. J. Mech. Sci. 9, p.609 (1967).
P. Eyokens, S. He, A. Van Bael, P. Van Houtte and J. Duflou, "Forming limit predictions for the serrated strain paths in single point incremental forming", to be presented at NUMIFORM07.
