@article{24894, author = {{Mahnken, Rolf and Wolff, M. and Schneidt, A. and Böhm, M.}}, issn = {{0749-6419}}, journal = {{International Journal of Plasticity}}, pages = {{1--26}}, title = {{{Multi-phase transformations at large strains – Thermodynamic framework and simulation}}}, doi = {{10.1016/j.ijplas.2012.05.009}}, year = {{2012}}, } @article{24716, author = {{Nörenberg, Nicole and Mahnken, Rolf}}, issn = {{0939-1533}}, journal = {{Archive of Applied Mechanics}}, pages = {{367--378}}, title = {{{A stochastic model for parameter identification of adhesive materials}}}, doi = {{10.1007/s00419-012-0684-7}}, year = {{2012}}, } @article{24713, author = {{Mahnken, Rolf and Shaban, A.}}, issn = {{0939-1533}}, journal = {{Archive of Applied Mechanics}}, pages = {{53--71}}, title = {{{Finite elasto-viscoplastic modeling of polymers including asymmetric effects}}}, doi = {{10.1007/s00419-012-0632-6}}, year = {{2012}}, } @article{24890, author = {{Widany, Kai-Uwe and Mahnken, Rolf}}, issn = {{1617-7061}}, journal = {{PAMM}}, pages = {{213--214}}, title = {{{Adaptive FEM with Stabilized Elements for Parameter Identification of Incompressible Hyperelastic Materials}}}, doi = {{10.1002/pamm.201210097}}, year = {{2012}}, } @article{24889, author = {{Nörenberg, Nicole and Mahnken, Rolf}}, issn = {{1617-7061}}, journal = {{PAMM}}, pages = {{317--318}}, title = {{{A stochastic model for the direct and inverse problem of adhesive materials}}}, doi = {{10.1002/pamm.201210148}}, year = {{2012}}, } @article{24891, author = {{Schneidt, Andreas and Antretter, Thomas and Mahnken, Rolf}}, issn = {{1617-7061}}, journal = {{PAMM}}, pages = {{341--342}}, title = {{{Micromechanical modeling of bainitic phase transformation}}}, doi = {{10.1002/pamm.201210159}}, year = {{2012}}, } @article{19132, author = {{Caylak, Ismail and Mahnken, Rolf}}, issn = {{1617-7061}}, journal = {{PAMM}}, pages = {{319--320}}, title = {{{Modeling of induced anisotropy at large deformations for polymers}}}, doi = {{10.1002/pamm.201210149}}, year = {{2012}}, } @article{15984, abstract = {{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.}}, author = {{Schmidt, Hans Christian and Damerow, Ulf and Lauter, Christian and Gorny, Bernhard and Hankeln, Frederik and Homberg, Werner and Tröster, Thomas and Maier, Hans Jürgen and Mahnken, Rolf}}, issn = {{1662-9795}}, journal = {{Key Engineering Materials}}, pages = {{295--300}}, title = {{{Manufacturing Processes for Combined Forming of Multi-Material Structures Consisting of Sheet Metal and Local CFRP Reinforcements}}}, doi = {{10.4028/www.scientific.net/kem.504-506.295}}, year = {{2012}}, } @inproceedings{15986, author = {{Gorny, B. and Hankeln, Frederik and Lauter, Christian and Schmidt, H. C. and Damerow, U. and Mahnken, Rolf and Maier, H. J. and Tröster, Thomas and Homberg, Werner}}, location = {{Turin, Italy}}, title = {{{Simulation and manufacturing of deep drawn parts reinforced by carbon fibre prepregs}}}, year = {{2012}}, } @phdthesis{19187, author = {{Caylak, Ismail}}, isbn = {{978-3-8440-0084-9}}, pages = {{158 Seiten}}, publisher = {{Shaker}}, title = {{{Stabilized Mixed Triangular and Tetrahedral Finite Elements with Volume and Area Bubble Functions}}}, volume = {{Band 4}}, year = {{2011}}, } @article{16239, author = {{Hankeln, Frederik and Mahnken, Rolf}}, issn = {{1617-7061}}, journal = {{PAMM}}, pages = {{379--380}}, title = {{{Simulation of Deep Drawing of Carbon Fibre Prepregs}}}, doi = {{10.1002/pamm.201110181}}, year = {{2011}}, } @article{25087, author = {{Wolff, Michael and Böhm, Michael and Mahnken, Rolf and Suhr, Bettina}}, issn = {{0029-5981}}, journal = {{International Journal for Numerical Methods in Engineering}}, pages = {{1183--1206}}, title = {{{Implementation of an algorithm for general material behavior of steel taking interaction between plasticity and transformation-induced plasticity into account}}}, doi = {{10.1002/nme.3154}}, year = {{2011}}, } @article{25089, author = {{Mahnken, Rolf and Wilmanns, Stefan}}, issn = {{0927-0256}}, journal = {{Computational Materials Science}}, pages = {{2535--2548}}, title = {{{A projected Newton algorithm for simulation of multi-variant textured polycrystalline shape memory alloys}}}, doi = {{10.1016/j.commatsci.2011.03.010}}, year = {{2011}}, } @article{25086, author = {{Loboda, V. and Mahnken, Rolf}}, issn = {{0001-5970}}, journal = {{Acta Mechanica}}, pages = {{327--339}}, title = {{{An investigation of an electrode at the interface of a piezoelectric bimaterial space under remote electromechanical loading}}}, doi = {{10.1007/s00707-011-0519-6}}, year = {{2011}}, } @article{24892, author = {{Mahnken, Rolf}}, issn = {{0143-7496}}, journal = {{International Journal of Adhesion and Adhesives}}, pages = {{1--14}}, title = {{{Simulation of strength difference coupled to softening in elasto-plasticity for adhesive materials}}}, doi = {{10.1016/j.ijadhadh.2011.08.006}}, year = {{2011}}, } @article{25085, author = {{Mahnken, Rolf and Schneidt, A. and Tschumak, S. and Maier, H.J.}}, issn = {{0927-0256}}, journal = {{Computational Materials Science}}, pages = {{1823--1829}}, title = {{{On the simulation of austenite to bainite phase transformation}}}, doi = {{10.1016/j.commatsci.2010.12.032}}, year = {{2011}}, } @article{25088, author = {{Caylak, Ismail and Mahnken, Rolf}}, issn = {{0045-7949}}, journal = {{Computers & Structures}}, pages = {{1844--1851}}, title = {{{Mixed finite element formulations with volume bubble functions for triangular elements}}}, doi = {{10.1016/j.compstruc.2011.07.004}}, year = {{2011}}, } @article{25081, author = {{Sauerland, Kim-Henning and Mahnken, Rolf}}, issn = {{1617-7061}}, journal = {{PAMM}}, pages = {{551--552}}, title = {{{Meso-Macro Modelling of Coated Forming Tools under Thermal Shock Conditions}}}, doi = {{10.1002/pamm.201110265}}, year = {{2011}}, } @article{24895, author = {{Widany, Kai-Uwe and Mahnken, Rolf}}, issn = {{1617-7061}}, journal = {{PAMM}}, pages = {{299--300}}, title = {{{An error indicator for parameter identification with stabilized mixed tetrahedrals}}}, doi = {{10.1002/pamm.201110141}}, year = {{2011}}, } @book{29116, author = {{Mahnken, Rolf}}, isbn = {{9783642217104}}, issn = {{0937-7433}}, title = {{{Lehrbuch der Technischen Mechanik - Statik}}}, doi = {{10.1007/978-3-642-21711-1}}, year = {{2011}}, }