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
3D FEM Simulations of a shape rolling process
A finite element model has been developed for the simulation of the shape rolling of stator 
vanes. These simulations should support the design of rolling tools for new vane types. For the time being 
only straight vanes (vanes with a constant cross-section over the length) are studied. In that case the rolling 
process can be considered stationary and an ALE formulation is suitable to calculate the steady state. Results 
of simulations and experiments for a symmetrical straight vane are presented
Mechanical behaviour and durability of high volume fly ash cementitious composites
The purpose of this research is to separate different morphological particles of ASTM class F fly ash, and study their effect on mechanical behaviour and durability of high volume cementitious mixtures. In this research wet separation of raw fly ash is carried out, which resulted in three layers of different morphological particles. The first layer of particles float, comprise of about 1-5% of fly ash, is identified as cenospheres or hollow spheres. The second layer of particles is measured to be 55-60% of raw fly ash and consisting of porous spherical and rounded particles rich in Si and Al. The third layer particles is measured to be about 35-40% of raw fly ash. High volume fly ash cementitious composites containing second or third layer particles are tested under compression and bending, highlighting a higher strength and ductility in comparison to cementitious ones containing raw fly ash particles. KEYWORDS. Cementitious matrix; Raw fly ash; Second layer particles; Third layer particles.