TY - JOUR AU - Hankeln, Frederik AU - Mahnken, R. ID - 16237 JF - Composite Structures SN - 0263-8223 TI - A mesoscopic model for deep drawing of carbon fibre prepregs at large strains ER - TY - JOUR AU - Hankeln, Frederik AU - Mahnken, Rolf ID - 16238 JF - PAMM SN - 1617-7061 TI - Carbon Fibre Prepregs: Simulation of a Thermo-Mechanical-Chemical Coupled Problem ER - TY - JOUR AB - A new and promising approach to the reduction of greenhouse gas emissions is the use of improved lightweight constructions based on multi-material systems comprising sheet metal with local carbon fibre reinforced plastic (CFRP) reinforcements. The CFRP is used to reinforce highly stressed areas and can be aligned to specific load cases. The locally restricted application of CFRP means that the material costs can be effectively reduced by comparison to parts made entirely of CFRP on account of the expensive production process requiring the use of an autoclave. These parts are thus only used in high-priced products. The production of hybrid CFRP steel structures in a mass production process calls for an efficient production technology. Current research work within the scope of a collaborative research project running at the University of Paderborn is concentrating on the development of manufacturing processes for the efficient production of automotive structural components made up of sheet metal blanks with local CFRP patches. The project is focusing especially on basic research into the production of industrial components. The aim of the investigation is to create an efficient and controlled process for producing CFRP reinforced steel structures from semi-finished hybrid steel-CFRP material. This includes tool concepts and an appropriate process design to permit short process times. The basis of an efficient process design is an in-depth knowledge of the material behaviour, and hence a thorough characterisation was performed. Material parameters were determined for both simulation and forming. For this, monotonic tensile, shear and bending tests were conducted using both uncured prepregs and cured CFRP specimens. To achieve an accurate simulation of the forming process, a special material model for carbon fibre prepregs has been developed which also includes the anisotropic material behaviour resulting from fibre orientation, the viscoelastic behaviour caused by the matrix and the hardening effects that prevail during curing. Recent results show good qualitative agreement and will be presented in this paper. In order to control the properties of the hybrid components, four different tool concepts for the prepreg press technology have been developed and tested. The concepts are presented and the results of experimental investigations are discussed in this paper. AU - Schmidt, Hans Christian AU - Damerow, Ulf AU - Lauter, Christian AU - Gorny, Bernhard AU - Hankeln, Frederik AU - Homberg, Werner AU - Tröster, Thomas AU - Maier, Hans Jürgen AU - Mahnken, Rolf ID - 15984 JF - Key Engineering Materials SN - 1662-9795 TI - Manufacturing Processes for Combined Forming of Multi-Material Structures Consisting of Sheet Metal and Local CFRP Reinforcements ER - TY - CONF AU - Gorny, B. AU - Hankeln, Frederik AU - Lauter, Christian AU - Schmidt, H. C. AU - Damerow, U. AU - Mahnken, Rolf AU - Maier, H. J. AU - Tröster, Thomas AU - Homberg, Werner ID - 15986 TI - Simulation and manufacturing of deep drawn parts reinforced by carbon fibre prepregs ER - TY - JOUR AU - Hankeln, Frederik AU - Mahnken, Rolf ID - 16239 JF - PAMM SN - 1617-7061 TI - Simulation of Deep Drawing of Carbon Fibre Prepregs ER -