MK modelling of sheet formability in the incremental sheet forming process, taking into account through-thickness shear

This paper presents experimental measurements of the Through-Thickness Shear (TTS), (also known as out-of-plane shear) that occurs during Single Point Incremental Forming (SPIF) of low carbon steel into cone-shaped geometries. The measurements show the dependence of TTS on the cone wall angle. Also formability predictions are presented, using a Marciniak-Kuczynski (MK) type of forming limit model which can take TTS explicitly into account [1]. It is seen that the presence of TTS in the process delays the onset of localized necking and thus can be a contributing factor to the very high formability during SPIF that is observed.status: publishe