Published in International Journal of Material Forming
In the original publication of this paper, an incorrect image of Figure 3 was used in error.
Published in International Journal of Material Forming
The fragmentation of α lamellae and the subsequent spheroidization of α laths, in α/β titanium alloys, are well known phenomena, occurring during and after deformation. We will illustrate the development of a new finite element methodology to model these phenomena. This new methodology is based on a level set framework modeling the deformation and ...
Published in International Journal of Material Forming
Significant progress has been achieved on modeling the influence of plastic anisotropy on forming of polycrystalline metal sheets. In contrast, the effect of crystal orientation on forming of single-crystal sheets has been largely unexplored. In this paper, using a recently developed single crystal criterion, it is shown that the single-crystal ori...
Published in International Journal of Material Forming
In this work, a fully automated adaptive remeshing strategy, based on a tetrahedral element for 3D metal forming processes, was proposed in order to solve problems associated with the severe mesh distortion that occurs during the computation. The main idea is to use the h-type adaptive mesh in combination with an a-posteriori error estimator measur...
Published in International Journal of Material Forming
Advanced high strength steels are widely used in the automotive industry due to their appropriate strength to weight ratio. This alloy has unique hardening behavior. In this paper, a novel analytical model is introduced to predict springback in U-shaped bending process of as-received and pre-strained DP780 dual phase steel specimens. This model is ...
Published in International Journal of Material Forming
The virtual fields method is an approach to inversely identify material parameters using full-field deformation data. In this work, we extend the sensitivity-based virtual fields to large deformation anisotropic plasticity. The method is firstly generalized to the finite deformation framework and then tested on numerical data obtained from a finite...
Published in International Journal of Material Forming
Flow drilling is a relatively unexplored manufacturing process in which the tool penetrates the workpiece with a defined force or defined feed along its rotational axis. This paper presents a developed three-dimensional (3D)-finite element method (FEM) simulation model to predict the performance of modified flow drilling tools. To validate the simu...
Published in International Journal of Material Forming
Sum-of-square based error formulations may be difficult to implement on an inverse analysis consisting of multiple tension-compression hysteresis loops. Five alternative measures of similarity between curves are investigated as useful tools to help identify parameters from hysteresis loops with inverse analyses. A new algorithm is presented to calc...
Published in International Journal of Material Forming
One approach to design load optimized structures is the use of bifurcations. Linear flow splitting is a continuous sheet-bulk metal forming process, whereby bifurcated profiles are manufactured without joining or external heat supply. By roll forming linear flow split profiles, a wide spectrum of profile geometries can be realized, e.g. multi-chamb...
Published in International Journal of Material Forming
Due to the need for low-cost tooling and quality parts, a new technique has been developed which brings together the benefits of both multi-point forming (MPF) and rubber-pad forming. A significant disadvantage of MPF is the time required to adjust the heights of the pins in the upper and lower matrices and align the tools. Rubber forming achieves ...
