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Dr. Kärger

Dr.-Ing. Luise Kärger

Akademische Rätin Stellvertretende Teilinstitutsleitung & Leiterin der Vector Stiftungs-YIG "Green Mobility"
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Raum: 123
Tel.: +49 721 608-45386
Fax: +49 721 608-945905
luise kaergerWdf2∂kit edu

Institut für Fahrzeugsystemtechnik
Lehrstuhl für Leichtbautechnologie
Rintheimer Querallee 2, Geb. 70.04
76131 Karlsruhe



Forschungsschwerpunkte

  • Gewichtsoptimierte Fahrzeugstrukturen durch maßgeschneiderte Hochleistungsfaserverbunde (Vector Stiftungs-YIG „Green Mobility“)
  • Prozess- und Struktursimulation von kontinuierlich und diskontinuierlich verstärkten Faserverbunden
  • Entwicklung durchgängiger CAE-Ketten für Endlos- und Langfaserverbunde
  • Optimierungsstrategien für Faserverbundprozesse und die resultierende Tragfähigkeit

 

Vorlesungen

Simulation der Prozesskette kontinuierlich verstärkter Faserverbundbauteile (SS)

Strukturberechnung von Faserverbundlaminaten (WS)

 

Veröffentlichungen

  • Galkin S, Schirmaier F, Kärger L: Simplified phenomenological model of the nonlinear behaviour of FRPs under combined stress states. Journal of Composite Materials. In press, available online: http://journals.sagepub.com/doi/pdf/10.1177/0021998317709332, 2017.

  • Dörr D., Brymerski W., Ropers S., Leutz D., Joppich T., Kärger L., Henning F.: A Benchmark Study of Finite Element Codes for Forming Simulation of Thermoplastic UD-Tapes, 1st CIRP Conference on Composite Materials Parts Manufacturing (CIRP CCMPM 2017), doi: 10.1016/j.procir.2017.03.223, 2017.

  • Dörr D., Schirmaier F. J., Henning F., Kärger L., On The Relevance of Modeling Viscoelastic Bending Behavior in Finite Element Forming Simulation of Continuously Fiber Reinforced Composites, ESAFORM2017, Dublin, 2017.

  • Poppe C., Dörr D., Joppich T., Kärger L., Henning F., Modeling and Validation of Gripper Induced Membrane Forces in Finite Element Forming Simulation of Continuously Reinforced Composites, ESAFORM2017, Dublin, 2017.

  • Kugele D., Dörr D., Wittemann F., Hangs B., Rausch J., Kärger L., Henning F., Modelling of the Non-Isothermal Crystallization Kinetics of Polyamide 6 Composites During Thermoforming, ESAFORM2017, Dublin, 2017.

  • Kärger L, Galkin S, Zimmerling C, Dörr D, Schirmaier FJ, Oeckerath A, Wolf K, Linden J: Continuous CAE chain for composite design, established on an HPC system and accessible via web-based user-interfaces. Proceedings. NAFEMS World Congress, Stockholm, 2017.

  • Hohberg, Martin; Kärger, Luise; Hrymak, Andrew; Henning, Frank: Prozesssimulation von Sheet Molding Compound (SMC) als Schlüssel zur integrierten Simulationskette. NAFEMS Magazin 42: 49-56, ISSN 2311-522X, 2017.

  • Hohberg, M.; Kärger, L.; Henning, F.; Hrymak, A.:  Rheological Measurements and Rheological Shell Model considering the Compressible Behavior of Long Fiber Reinforced Sheet Molding Compound (SMC), Composites Part A 95, S. 110–117 (2017)., doi: 10.1016/j.compositesa.2017.01.006.

  • Dörr, D., Schirmaier, F.J., Henning, F., Kärger, L., A viscoelastic approach for modeling bending behavior in Finite Element forming simulation of continuously fiber reinforced composites, Composites: Part A 94: 113-123, doi: http://dx.doi.org/10.1016/j.compositesa.2016.11.027, 2017.

  • Rösner AM, Kärger L, Henning F: Virtual characterization and macroscopic material modeling of a carbon fiber-reinforced PA6 UD composite. Journal of Composite Materials. Available online, 2016.
    doi: http://dx.doi.org/10.1177/0021998316681186

  • Bernath, A.; Kärger, L.; Henning, F.:  Accurate Cure Modeling for Isothermal Processing of Fast Curing Epoxy Resins. Polymers 8 (11): 390, 2016.

  • Botzkowski T, Galkin S, Wagner S, Sikora S, Kärger L: Experimental and numerical analysis of bolt-loaded open-hole laminates reinforced by winded carbon rovings. Composite Structures 141: 194-202, 2016.

  • Schirmaier, F.J.; Weidenmann, K.A.; Kärger, L.; Henning, F.:  Characterisation of the draping behaviour of unidirectional non-crimp fabrics (UD-NCF). Composites Part A: Applied Science and Manufacturing 80: 28–38, 2016.

  • Kärger L, Botzkowski T, Galkin S, Wagner S, Sikora SP: Stress analysis and design suggestions for multi-loop carbon roving rosettes to reinforce bolt-loaded open-hole laminates. ECCM17 - 17th European Conference on Composite Materials, Munich, 2016.

  • Dörr D, Joppich T, Schirmaier F, Mosthaf T, Kärger L, Henning F: Sensitivity of material properties on wrinkling behavior and fiber reorientation of thermoplastic UD-Tape laminates during forming analyzed by Finite Element forming simulation. ECCM17 - 17th European Conference on Composite Materials, Munich, 2016.

  • Kugele D, Rausch J, Kriegseis J, Gündisch K, Kärger L, Henning F: On the Thermal Behavior of Thermoplastic Laminates During Transfer – A Novel Wind-Tunnel Approach. ECCM17 - 17th European Conference on Composite Materials, Munich, 2016.

  • Gerstenkorn J, Deinzer G, Kothmann MH, Diebold F, Kärger L, Henning F: Characterization of the multi-axial material behavior of polymer foams during RTM process. ECCM17 - 17th European Conference on Composite Materials, Munich, 2016.

  • Naake D, Welschinger F, Kärger L, Henning F: Elasto-viscoplastic damage model for ther-moplastic matrix materials for the multi-scale modelling approach of organic sheets, EMMC15 - 15th European Mechanics of Materials Conference, Brussels, 2016.

  • Dörr D, Lipowsky L, Schirmaier F, Kärger L, Henning F: Iterative determination of the tailoring of blanks for a waste-free composite forming by means of finite element forming simulation. Proceedings. ICAutoC2016 - International Conference on Automotive Composites, Lisbon, 2016.

  • Hohberg, Martin; Kärger, Luise; Hrymak, Andrew; Henning, Frank: Process Simulation of Sheet Molding Compound (SMC) as key for the integrated Simulation Chain, NAFEMS Seminar: „Simulation von Composites – Bereit für Industrie 4.0?“, Hamburg, Germany, 26-27.10.2016

  • Kärger, L.; Bernath, A.; Fritz, F.; Galkin, S.; Magagnato, D.; Oeckerath, A.; Schön, A.; Henning, F.: Development and validation of a CAE chain for unidirectional fibre reinforced composite components. Composite Structures 132: 350–358, 2015.
     
  • Hummelberger, D.; Kärger, L., Henning, F.: Evaluation of different hybrid material systems and systematic analysis of their physical mechanisms in terms of fatigue, Materials Science Forum Vols. 825-826 pp 473-481, 2015.
     
  • Galkin S.; Schirmaier F.; Kärger L.: Application of a virtual shear stress model and comparison with WWFE-III prediction to describe the non-linear behavior of composite materials, Proceedings of the 20th International Conference on Composite Materials (ICCM) Kopenhagen, 2015.
     
  • Kärger, L. (eingeladen): Herausforderungen einer durchgängigen CAE-Kette am Beispiel des RTM-Prozesses. 2. Technologietag Hybrider Leichtbau, Stuttgart, 2015
     
  • Rösner, A.; Kärger, L.; Henning, F.: Characterization and simulation of the time-dependent anisotropic deformation behaviour of continuously reinforced PA6 material.  12th International Conference on the Mechanical Behavior of Materials (ICM), Karlsruhe, 2015.
     
  • Mrkonjić, M.; Rayling, U.; Weidenmann, K. A.; Kärger, L.; Henning, F.: Phenomenological characterization and macromechnical modeling of anisotropic, non-linear behavior of sheet molding compounds (SMC) 12th International Conference on the Mechanical Behavior of Materials (ICM), Karlsruhe, 2015.
     
  • Henning, F.; Bernath, A.; Chaudhari, R.; Kärger, L.; Magagnato, D.; Schirmaier, F.: An integrated development approach to combine design, manufacturing and validation of high-pressure RTM composite structures. Proceedings SAMPE Annual Tech Conference, Seattle, 2014.
     
  • Schirmaier, F.; Weiland, J.; Kärger, L.; Henning, F.:  A new efficient and reliable algorithm to determine the fracture angle for Puck's 3D matrix failure criterion for UD composites. Composites Science and Technology 100: 19-25, 2014.
     
  • Kärger L., Schön A., Fritz F., Böhler P., Magagnato D., Fischer S., Henning F.: “Virtual Process Chain for an integrated assessment of high-performance composite structures“. Proceedings of NAFEMS World Congress, Salzburg, 2013.
     
  • Kärger L., Schön A., Fritz F., Böhler P., Magagnato D., Fischer S., Henning F.: “Aufbau einer durchgängigen CAE-Kette durch Verknüpfung von Drapier-, Formfüll- und Struktursimulation zur ganzheitlichen Bewertung von Bauteilen aus Hochleistungsfaserverbunden “. Tagungsband DGM-Verbund, Karlsruhe, 2013.
     
  • Rösner, Andreas; Kärger, Luise; Henning, Frank; Weidenmann, Kay André:  Charakterisierung des Deformationsverhaltens eines durch Köpergewebe verstärkten Thermoplasten. Tagungsband DGM-Verbund, Karlsruhe, 2013.
     
  • Kärger, L.; Kling, A.: As-built FE Simulation of Advanced Fibre Placement structures based on manufacturing data. Composite Structures 100: 104-112, 2013.
     
  • Wille, T.; Kärger, L.; Hein, R.: Composite Process Chain Towards As-Built Design, In: Wiedemann, M.; Sinapius, M. (eds.) Adaptive, Tolerant and Efficient Composite Structures. Springer Verlag Berlin Heidelberg, pp. 199-210. ISBN 978-3-642-29189-0, 2013.
     
  • Kärger, L.; Baaran, J.; Wetzel, A.: Impact and Residual Strength Assessment Methodologies, In: Wiedemann, M.; Sinapius, M. (eds.) Adaptive, Tolerant and Efficient Composite Structures. Springer Verlag Berlin Heidelberg,  ISBN 978-3-642-29189-0, 2013
     
  • D. Chrupalla, J. Kreikemeier, S. Berg , L. Kärger, M. Doreille, T. Ludwig, E. Jansen, R. Rolfes, A. Kling: A Loose Coupling Multiscale Approach for the Detailed Analysis of the Influence of Critical Areas on the Global Behaviour of Composite Structures. Computers, Materials and Continua, 32 (3), Seiten 159-176, 2012.
     
  • Wille, T., Hein, R.; Heinecke, F.; Kärger, L.: Composite Tool Chain “As-Built”, Proceedings of the NAFEMS Konferenz: Berechnung und Simulation – Anwendungen, Entwicklungen, Trends, Bamberg, Germany, 2012.
     
  • Kärger, L.; Kling, A.: Feedback Method transferring manufacturing data of TFP structures to as-built FE models. Keynote-Lecture, ECCM, Paris, 2010.
     
  • Degenhardt, R.; Kling, A.; Bethge, A.; Orf, J. Kärger, L.; Zimmermann, R.; Rohwer, K.; Calvi, A.: Investigations on imperfection sensitivity and deduction of improved knock-down factors for unstiffened CFRP cylindrical shells. Composite Structures 92: 1939-1946, 2010.
     
  • Kärger, L.; Baaran, J.; Gunnion, A.; Thomson, R.: Evaluation of Impact Assessment Methodologies. Part II: Experimental Validation. Composites Part B 40: 71-76, 2009.
     
  • Kärger, L.; Baaran, J.; Gunnion, A.; Thomson, R.: Evaluation of Impact Assessment Methodologies. Part I: Applied Methods. Composites Part B 40: 65-70, 2009.
     
  • Baaran, J.; Kärger, L.; Wetzel, A.: Efficient prediction of composite damage resistance and damage tolerance. Journal of Aerospace Engineering 222(G1): 179-188, Proc. IMechE, Part G, 2008.
     
  • Kärger, L.; Baaran, J.; Teßmer, J.: Efficient simulation of low-velocity impacts on composite sandwich panels. Computers and Structures 86: 988-996, 2008.
     
  • Kling, A.; Kärger, L.; Baaran, J.; Teßmer, J.; Degenhardt, R.: Potentials and Limitation of FE-based Simulation Methods for Fibre Composite Structures. Proc. NAFEMS "Reliable Use of Numerical Methods in Upfront Simulations", Wiesbaden, 2007.
     
  • Kärger, L.; Baaran, J.; Teßmer, J.: Experimental validation of efficient impact simulation methodologies of sandwich structures. Proc. AIAC, Melbourne, 2007.
     
  • Kärger, L.: Effiziente Simulation von Schlagschädigungen in Faserverbund-Sandwichstrukturen. DLR-FB 131-2007/18, ISSN 1434-8454, 2007.
     
  • Kintscher, M.; Kärger, L.; Wetzel, A.; Hartung, D.: Stiffness and failure behaviour of folded sandwich cores under combined transverse shear and compression. Composites Part A 38: 1288-1295, 2007.
     
  • Kärger, L.; Baaran, J.; Teßmer, J.: Rapid simulation of impacts on composite sandwich panels inducing barely visible damage. Composite Structures 79: 527-534, 2007.
     
  • Kärger, L.; Wetzel, A.; Rolfes, R.; Rohwer, K.: A three-layered sandwich element with improved transverse shear stiffness and stresses based on FSDT. Computers and Structures 84: 843-854, 2006.
     
  • Wetzel, A.; Kärger, L.; Rolfes, R.; Rohwer, K.: Evaluation of two finite element formulations for a rapid 3D stress analysis of sandwich structures. Computers and Structures 83: 1537-1545, 2005.