lab., strength of materials lab. and fluid mechanics lab.-Participated in Tempus and FP7 projects for energy, water and environment.-Developed an engineering eLearning web site.-Obtained funding for several research projects.-Supervised many engineering projects at undergraduate and graduate levels.-Published, presented at international conferences and reviewed many research papers in the areas...

†Hoogovens Research and Development, Product Application Centre, P.O. Box 10000, 1970 CA IJmuiden, The Netherlands, e-mail: [email protected] *University of Twente, Faculty of Mechanical Engineering, P.O. Box 217, 7500 AE Enschede, The Netherlands, e-mail: [email protected] Automotive Tailored Blanks, P.O. Box 505, 3750 GM Bunschoten, The Netherlands, e-mail: bstokman@automoti...

This study was aimed to explain the influence of surface roughness of the drawbead on non-symmetry deep drawing cold rolled steel sheet to improve the drawability of cold rolled steel sheet. The variables used in this study included semi-circle drawbead with 3 levels of surface roughness which are 6.127 μm Ra, 0.963 μm Ra and 0.152 μm Ra and cold rolled steel sheet according to 3 grades of the ...

When a sheet metal forming operation, such as deep drawing, is followed by a trimming operation the numerical springback is influenced by various physical parameters and numerical factors. Two techniques of taking into the account the stress state change due to cutting in the FE plate model are discussed in the present paper. The first technique concentrates on the effect of the element mesh cu...

Pure Niobium is a material of interest for high-energy-physics applications including superconducting accelerators. Cold-rolled sheets Nb exhibit significant plastic anisotropy. Here we report on the mechanical and forming properties 99.95% pure, 1.02 mm thin, cold-rolled sheet. Uniaxial tension, biaxial tension disc compression experiments are performed, first two at multiple angles to rolling...