Spritzgusssimulation
Wir bilden den Formfüllvorgang für Thermoplast und Duromer nicht-isotherm, transient und dreidimensional ab. Das Simulationsmodell entspricht der Kavität im realen Prozess. Schneckenvorraum, Plastifizierung sowie Temperierung gehen als Anfangs-/Randbedingung mit ein. Prozessparameter wie Füllrate, Umschaltpunkt, Material- und Werkzeugtemperatur könne eins zu eins übernommen werden. Das Material wird nicht-Newtonsch und bei Faserverstärkung anisotrop simuliert. Wesentliche Ergebnisse sind Temperatur und Druckverteilung, Faserorientierung und Aussagen über Bindenähte, Lufteinschlüsse etc. Die im Prozess entstehende Faserorientierung kann für Struktur und Verzugssimulationen genutzt werden.
Forschungsschwerpunkte
- Nicht-Newtonsche Fließmodellierung
- Anisotropes Fließen
- Faserbruch
- Bauteilverzug
- Recyclingmaterialien
- Konturnahe Temperierung
- Probabilistische Simulation
Forschungsprojekte |
AnsprechpartnerDr.-Ing. Florian Wittemann
M.Sc. Christina Dohmen
M.Sc. Stjepan Salatovic |
Ausgewählte Veröffentlichungen im Forschungsfeld
Experimental investigation to reduce knit line effects in C-SMC
Olma, M.; Meyer, N.; Ilinzeer, S.; Krauß, C.; Wittemann, F.; Kärger, L.
2025. Material Forming: ESAFORM 2025, 355–362, Materials Research Forum LLC. doi:10.21741/9781644903599-39
Olma, M.; Meyer, N.; Ilinzeer, S.; Krauß, C.; Wittemann, F.; Kärger, L.
2025. Material Forming: ESAFORM 2025, 355–362, Materials Research Forum LLC. doi:10.21741/9781644903599-39
A finite volume approach for general fully coupled anisotropic porous solid mechanics of fiber reinforcements in Liquid Composite Molding
Schlegel, S.; Wittemann, F.; Kärger, L.
2025. Composites Part B: Engineering, 302, 112448. doi:10.1016/j.compositesb.2025.112448
Schlegel, S.; Wittemann, F.; Kärger, L.
2025. Composites Part B: Engineering, 302, 112448. doi:10.1016/j.compositesb.2025.112448
Mechanical and kinetic characterization of additively manufactured PLA structures for improved process and warpage modeling
FRÖLICH, F.; Dörr, D.; Jackstadt, A.; Wittemann, F.; Kärger, L.
2025. Material Forming - ESAFORM 2025, 2281–2290, Materials Research Forum LLC. doi:10.21741/9781644903599-246
FRÖLICH, F.; Dörr, D.; Jackstadt, A.; Wittemann, F.; Kärger, L.
2025. Material Forming - ESAFORM 2025, 2281–2290, Materials Research Forum LLC. doi:10.21741/9781644903599-246
Micro-scale flow simulations for determination of interaction coefficients in macroscopic fibre orientation modelling
Wittemann, F.; Hof, L.; Meyer, N.; Kärger, L.
2025, April 9. 14th International Conference on Manufacturing of Advanced Composites (ICMAC 2025), Coventry, Vereinigtes Königreich, 9.–10. April 2025
Wittemann, F.; Hof, L.; Meyer, N.; Kärger, L.
2025, April 9. 14th International Conference on Manufacturing of Advanced Composites (ICMAC 2025), Coventry, Vereinigtes Königreich, 9.–10. April 2025
Injection moulding simulation using a CEL approach: sensitivity analysis for the equation of state and mass scaling
Dohmen, C.; Wittemann, F.; Kärger, L.
2025, April 9. 14th International Conference on Manufacturing of Advanced Composites (ICMAC 2025), Coventry, Vereinigtes Königreich, 9.–10. April 2025
Dohmen, C.; Wittemann, F.; Kärger, L.
2025, April 9. 14th International Conference on Manufacturing of Advanced Composites (ICMAC 2025), Coventry, Vereinigtes Königreich, 9.–10. April 2025
A submodeling approach for efficient prediction of local temperature profiles in component-scale additive manufacturing
Frölich, F.; Hof, L.; Zimmerling, C.; Wittemann, F.; Kärger, L.
2024. The International Journal of Advanced Manufacturing Technology. doi:10.1007/s00170-024-14913-w
Frölich, F.; Hof, L.; Zimmerling, C.; Wittemann, F.; Kärger, L.
2024. The International Journal of Advanced Manufacturing Technology. doi:10.1007/s00170-024-14913-w
Efficient Approximation of Varying Fiber Orientation States in Injection Molded Parts Under Consideration of Multiple Manufacturing Uncertainties
Wittemann, F.; Krauß, C.; Kärger, L.
2025. Applied Composite Materials, 32 (1), 149–172. doi:10.1007/s10443-024-10268-3
Wittemann, F.; Krauß, C.; Kärger, L.
2025. Applied Composite Materials, 32 (1), 149–172. doi:10.1007/s10443-024-10268-3
Modeling Approach for Reactive Injection Molding of Polydisperse Suspensions with Recycled Thermoset Composites
Jetty, B.; Wittemann, F.; Kärger, L.
2024. Polymers, 16 (16), Art.-Nr.: 2245. doi:10.3390/polym16162245
Jetty, B.; Wittemann, F.; Kärger, L.
2024. Polymers, 16 (16), Art.-Nr.: 2245. doi:10.3390/polym16162245
Anisotropic Warpage Prediction of Injection Molded Parts with Phenolic Matrix
Wittemann, F.; Bernath, A.; Meyer, N.; Kärger, L.
2024. Proceedings of the 21st European Conference on Composite Materials (ECCM 2024). Ed.: C. Binetruy. Vol. 5, 139–145, European Society for Composite Materials (ESCM)
Wittemann, F.; Bernath, A.; Meyer, N.; Kärger, L.
2024. Proceedings of the 21st European Conference on Composite Materials (ECCM 2024). Ed.: C. Binetruy. Vol. 5, 139–145, European Society for Composite Materials (ESCM)
Investigation of the thermoviscoelastic behavior of a closed-cell polymer structural foam under pressure for processing in hybrid LCM processes
Dietrich, S.; Dohmen, C.; Frölich, F.; Jackstadt, A.; Wittemann, F.; Kärger, L.
2024. Proceedings of the 21st European Conference on Composite Materials. Vol 2 Material Science. Ed.: C. Binetruy, 548–554, European Society for Composite Materials (ESCM)
Dietrich, S.; Dohmen, C.; Frölich, F.; Jackstadt, A.; Wittemann, F.; Kärger, L.
2024. Proceedings of the 21st European Conference on Composite Materials. Vol 2 Material Science. Ed.: C. Binetruy, 548–554, European Society for Composite Materials (ESCM)
of-rtm-6 – An OpenFOAM-6 extension with curing models and anisotropic permeability for usage in LCM simulations
Bernath, A.; Seuffert, J.; Dietrich, S.; Poppe, N.; Magagnato, D.; Wittemann, F.; Henning, F.; Kärger, L.
2024. doi:10.5281/zenodo.13327698
Bernath, A.; Seuffert, J.; Dietrich, S.; Poppe, N.; Magagnato, D.; Wittemann, F.; Henning, F.; Kärger, L.
2024. doi:10.5281/zenodo.13327698
Initial stack placement strategies for carbon fiber- reinforced sheet molding compound (C-SMC)
Olma, M.; Meyer, N.; Krauß, C.; Wittemann, F.; Kärger, L.
2024, Juli 5. 21st European Conference on Composite Materials (ECCM 2024), Nantes, Frankreich, 2.–5. Juli 2024
Olma, M.; Meyer, N.; Krauß, C.; Wittemann, F.; Kärger, L.
2024, Juli 5. 21st European Conference on Composite Materials (ECCM 2024), Nantes, Frankreich, 2.–5. Juli 2024
Overmolding of 3D Skeleton Winding Structures: Process effects and challenges for process modeling
Dohmen, C.; Meyer, N.; Haas, J.; Beck, B.; Wittemann, F.; Kärger, L.
2024, Juli 5. 21st European Conference on Composite Materials (ECCM 2024), Nantes, Frankreich, 2.–5. Juli 2024
Dohmen, C.; Meyer, N.; Haas, J.; Beck, B.; Wittemann, F.; Kärger, L.
2024, Juli 5. 21st European Conference on Composite Materials (ECCM 2024), Nantes, Frankreich, 2.–5. Juli 2024
Homogenization of the Anisotropic Thermal Conductivity of Mesostructures in Material Extrusion
Hof, L.; Frölich, F.; Wittemann, F.; Kärger, L.
2024, Juli 2. 21st European Conference on Composite Materials (ECCM 2024), Nantes, Frankreich, 2.–5. Juli 2024
Hof, L.; Frölich, F.; Wittemann, F.; Kärger, L.
2024, Juli 2. 21st European Conference on Composite Materials (ECCM 2024), Nantes, Frankreich, 2.–5. Juli 2024
Effects of varying fibre distribution in closed injection pultrusion modelling
Poppe, N.; Zeeb, G.; Wittemann, F.; Wilhelm, M.; Kärger, L.
2024, Juli 3. 21st European Conference on Composite Materials (ECCM 2024), Nantes, Frankreich, 2.–5. Juli 2024
Poppe, N.; Zeeb, G.; Wittemann, F.; Wilhelm, M.; Kärger, L.
2024, Juli 3. 21st European Conference on Composite Materials (ECCM 2024), Nantes, Frankreich, 2.–5. Juli 2024
Evaluation of mechanical properties characterization of additively manufactured components
Frölich, F.; Bechtloff, L.; Scheuring, B. M.; Heuer, A. L.; Wittemann, F.; Kärger, L.; Liebig, W. V.
2025. Progress in Additive Manufacturing, 10 (2), 1217–1229. doi:10.1007/s40964-024-00700-2
Frölich, F.; Bechtloff, L.; Scheuring, B. M.; Heuer, A. L.; Wittemann, F.; Kärger, L.; Liebig, W. V.
2025. Progress in Additive Manufacturing, 10 (2), 1217–1229. doi:10.1007/s40964-024-00700-2
Numerical Study on Uncertainty Effects in Injection Molding
Wittemann, F.; Kärger, L.
2023. 23rd International Conference on Composite Materials : (ICCM 23) held in Belfast, Northern Ireland, from July 30th to August 4th 2023, Queen’s University Belfast
Wittemann, F.; Kärger, L.
2023. 23rd International Conference on Composite Materials : (ICCM 23) held in Belfast, Northern Ireland, from July 30th to August 4th 2023, Queen’s University Belfast
Schnelle Methode zur Approximation von Druck- und Faserorientierungsverteilung infolge prozess- und materialbedingter Streuungen im Spritzguss
Wittemann, F.; Kärger, L.
2023. NAFEMS-Magazin, 68 (4), 22–28
Wittemann, F.; Kärger, L.
2023. NAFEMS-Magazin, 68 (4), 22–28
Structural health monitoring in additive manufactured structures by total electrical resistance measurements as
Liebig, W.; Muth, M.; Seitz, M.; Wittemann, F.; Weiss, P.
2022. ECCM20 - Proceedings of the 20th European Conference on Composite Materials - Composites Meet Sustainability (Vol 1-6), Ed.: A. Vassilopoulos, 1110–1117, École Polytechnique Fédérale de Lausanne (EPFL)
Liebig, W.; Muth, M.; Seitz, M.; Wittemann, F.; Weiss, P.
2022. ECCM20 - Proceedings of the 20th European Conference on Composite Materials - Composites Meet Sustainability (Vol 1-6), Ed.: A. Vassilopoulos, 1110–1117, École Polytechnique Fédérale de Lausanne (EPFL)
Fiber breakage modeling based on hydrodynamic forces in macroscopic process simulations
Wittemann, F.; Maertens, R.; Henning, F.; Kärger, L.
2022. Composites Meet Sustainability - Proceedings of the 20th European Conference on Composite Materials. Ed.: A. Vassilopoulos, École Polytechnique Fédérale de Lausanne (EPFL)
Wittemann, F.; Maertens, R.; Henning, F.; Kärger, L.
2022. Composites Meet Sustainability - Proceedings of the 20th European Conference on Composite Materials. Ed.: A. Vassilopoulos, École Polytechnique Fédérale de Lausanne (EPFL)
Influence of fiber breakage on flow behavior in fiber length- and orientation-dependent injection molding simulations
Wittemann, F.; Kärger, L.; Henning, F.
2022. Journal of Non-Newtonian Fluid Mechanics, 310, 104950. doi:10.1016/j.jnnfm.2022.104950
Wittemann, F.; Kärger, L.; Henning, F.
2022. Journal of Non-Newtonian Fluid Mechanics, 310, 104950. doi:10.1016/j.jnnfm.2022.104950
Design Approach for a Novel Multi Material Variable Flux Synchronous Reluctance Machine without Rare Earth Magnets
Kesten, J.; Frölich, F.; Wittemann, F.; Knirsch, J.; Bechler, F.; Kärger, L.; Eberhard, P.; Henning, F.; Doppelbauer, M.
2022. 2022 International Conference on Electrical Machines (ICEM), Valencia, Spain, 05-08 September 2022, 2304–2310, Institute of Electrical and Electronics Engineers (IEEE). doi:10.1109/ICEM51905.2022.9910780
Kesten, J.; Frölich, F.; Wittemann, F.; Knirsch, J.; Bechler, F.; Kärger, L.; Eberhard, P.; Henning, F.; Doppelbauer, M.
2022. 2022 International Conference on Electrical Machines (ICEM), Valencia, Spain, 05-08 September 2022, 2304–2310, Institute of Electrical and Electronics Engineers (IEEE). doi:10.1109/ICEM51905.2022.9910780
Simplified modeling of electromagnets for dynamic simulation of transient effects for a synchronous electric motor
Bechler, F.; Kesten, J.; Wittemann, F.; Henning, F.; Doppelbauer, M.; Eberhard, P.
2021. International Journal of Mechanical System Dynamics, 1 (1), 89–95. doi:10.1002/msd2.12005
Bechler, F.; Kesten, J.; Wittemann, F.; Henning, F.; Doppelbauer, M.; Eberhard, P.
2021. International Journal of Mechanical System Dynamics, 1 (1), 89–95. doi:10.1002/msd2.12005
Fiber-dependent injection molding simulation of discontinuous reinforced polymers. Dissertation
Wittemann, F.
2022. KIT Scientific Publishing. doi:10.5445/KSP/1000148499
Wittemann, F.
2022. KIT Scientific Publishing. doi:10.5445/KSP/1000148499
Fiber-dependent injection molding simulation of discontinuous reinforced polymers. Dissertation
Wittemann, F.
2022, Februar 16. Karlsruher Institut für Technologie (KIT). doi:10.5445/IR/1000142956
Wittemann, F.
2022, Februar 16. Karlsruher Institut für Technologie (KIT). doi:10.5445/IR/1000142956
Theoretical approximation of hydrodynamic and fiber-fiber interaction forces for macroscopic simulations of polymer flow process with fiber orientation tensors
Wittemann, F.; Kärger, L.; Henning, F.
2021. Composites. Part C, Open access, 5, Art.-Nr. 100152. doi:10.1016/j.jcomc.2021.100152
Wittemann, F.; Kärger, L.; Henning, F.
2021. Composites. Part C, Open access, 5, Art.-Nr. 100152. doi:10.1016/j.jcomc.2021.100152
Simulation of Reinforced Reactive Injection Molding with the Finite Volume Method
Wittemann, F.; Maertens, R.; Bernath, A.; Hohberg, M.; Kärger, L.; Henning, F.
2018. Journal of composites science, 2 (1), Aritcle no: 5. doi:10.3390/jcs2010005
Wittemann, F.; Maertens, R.; Bernath, A.; Hohberg, M.; Kärger, L.; Henning, F.
2018. Journal of composites science, 2 (1), Aritcle no: 5. doi:10.3390/jcs2010005
Injection molding simulation of short fiber reinforced thermosets with anisotropic and non-Newtonian flow behavior
Wittemann, F.; Maertens, R.; Kärger, L.; Henning, F.
2019. Composites / A, 124, 105476. doi:10.1016/j.compositesa.2019.105476
Wittemann, F.; Maertens, R.; Kärger, L.; Henning, F.
2019. Composites / A, 124, 105476. doi:10.1016/j.compositesa.2019.105476