Tool deformation during the shape rolling of stator vanes
Tool deformation is an important issue in the shape rolling of stator vanes as it directly 
influences the thickness of the rolled vane. This means that for the design of an accurate production process 
the deformation of the tools has to be accounted for. The shape rolling of symmetrical straight vanes has been 
investigated. This rolling process is considered stationary, because these vanes have a constant cross-section 
over the length. Therefore an ALE formulation is suitable to calculate the steady state. The deformation of 
the sheet as well as the deformation of the tools have been calculated with the developed finite element model. 
Some results of these simulations are presented in this paper
Analysis of guillotining and slitting, finite element simulations
Guillotining and slitting are two sheet metal cutting processes, which produce long straight cuts and can be seen as stationary processes. The analysis of these two processes is the subject of this thesis. This research project is part of a cluster of IOP projects on sheet metal cutting, originating from industrial requests for more fundamental knowledge, as sheet metal cutting is still mainly based on experience and trial and error. The objective is to develop models of guillotining and slitting to increase the insight and to contribute to the quality and productivity of these shearing processes.
Mathematical Modeling of Scour and Deposition
Electronic computers are opening up the field of sedimentation engineering by permitting the analysis of problems which heretofore have required too much time and effort. Movable stream bed profiles are being calculated in addition to water surface profiles. The initial gradation of sediment material in the stream bed may be prescribed to facilitate the calculation of an armor layer. This gradation is continually changed by the computer program in response to sediment particles being deposited on the stream bed and material on the stream bed being removed to satisfy transport capacity. Hydraulic sorting of sediment by grain size is accomodated. The stream bed does not have to be represented by a single grain size. Retardance of motion because of armor layer is calculated.