Dr.-Ing. Christoph Hartmann

Postdoctoral Researcher

Phone:    +49 (0)89 / 289 - 13769
E-Mail:    christoph.hartmann@utg.de
Room:     0445

Dissertation (2021)

Spatio-Temporal Optical Flow Methods for Process Analysis

ORCID iD

Research and Work Focus

  • Member of the management board
  • Responsibility and coordination of the research field "Hybrid, data- and physics-driven modeling"
    • Ill-posed problems
    • Inverse analyses
    • Reduced-order models
    • Physics-informed machine learning
    • Computer vision, sensing and perception
  • Optical measurement and deformation analysis
  • Incremental processes and additive manufacturing
  • Modeling of geometry and physical properties of manufactured components
  • Thermomechanical interactions in dynamic processes

Publications

2022

  • Lechner, P.; Reberger, E.; Gruber, M.; Kammerloher, S.; Hartmann, C.; Volk, W.: Localization of Cavities in Cast Components via Impulse Excitation and a Finite Element Analysis. Production Engineering, 2022 more…
  • Maier, L.; Hartmann, C.; Ünver, B.; Volk, W.: Three-Dimensional Control Point Based Surface Description for Data Reduction, Reverse Engineering and Springback Compensation in Sheet Metal Forming. In: The Minerals, Metals &Materials Series. Springer International Publishing, 2022 more…
  • Scandola, L.; Maier, D.; Werner, M. K.; Hartmann, C.; Volk, W.: Automatic Extraction and Conversion of the Bending Line from Parametric and Discrete Data for the Free-Form Bending Process. In: The Minerals, Metals &Materials Series. Springer International Publishing, 2022 more…
  • Vitzthum, S.; Rebelo Kornmeier, J.; Hofmann, M.; Gruber, M.; Maawad, E.; Batista, A.; Hartmann, C.; Volk, W.: In-situ analysis of the thermoelastic effect and its relation to the onset of yielding of low carbon steel. Materials & Design 219, 2022, 110753 more…

2021

  • Hartmann, C.; Maier, L.; Volk, W.: Springback and compensation in sheet metal forming reconsidered as an ill-posed problem. IOP Conference Series: Materials Science and Engineering 1157 (1), 2021, 12044 more…
  • Hartmann, C.; Weiss, H.A.; Lechner, P.; Volk, W.; Neumayer, S.; Fitschen, J.H.; Steidl, G.: Measurement of strain, strain rate and crack evolution in shear cutting. Journal of Materials Processing Technology 288, 2021, 116872 more…
  • Hartmann, C.; Welm, M.; Schreyer, S.; Hartmann, C.; Volk, W.: A Modular Car Body for Sustainable, Cost-Effective ,and Versatile Vehicle Development Zeitschriftentitel: MDPI Technologies. MDPI Technologies 9, 2021, 1-9 more…
  • Lechner, P.; Hartmann, C.; Ettemeyer, F.; Volk, W.: A Plane Stress Failure Criterion for Inorganically-Bound Core Materials. Materials 14 (2), 2021 more…
  • Maier, L.; Hartmann, C.; Volk, W.: Parameterized data handling for forming tool tryout: reverse engineering, data consolidation and springback compensation. IOP Conference Series: Materials Science and Engineering 1157 (1), 2021, 12035 more…
  • Ott, M.; Haberkern, P.; Gruber, M.; Hartmann, C.; Risch, T.; Wunderling, C.; Albers, A.; Volk, W.: Load-specific variant generation of bead cross sections in sheet metal components by unidirectional carbon fibre reinforcement. IOP Conference Series: Materials Science and Engineering 1157 (1), 2021, 012093 more…

2020

  • Lechner, P.; Fuchs, G.; Hartmann, C.; Steinlehner, F.; Ettemeyer, F.; Volk, W.: Acoustical and Optical Determination of Mechanical Properties of Inorganically-Bound Foundry Core. Materials (13), 2020 more…

2019

  • Hartmann, C.; Volk, W.: Digital image correlation and optical flow analysis based on the material texture with application on high-speed deformation measurement in shear cutting. Digital Image & Signal Processing, Corgascience, UK, 2019International Conference on Digital Image & Signal Processing (DISP 2019), 1-8 more…
  • Benkert, T.; Hartmann, C.; Eder, M.; Spekcmaier, F.; Volk, W.: MaterialModeler - From experimental raw data to a material model. SoftwareX 10, 2019, 100249 more…
  • Hartmann, C.; Hammerl, F.; Volk, W.: Experimental analysis of Roman coin minting. Journal of Archaeological Science: Reports 25, 2019, 498-506 more…
  • Hartmann, C.; Lechner, P.; Himmel, B.; Krieger, Y.; Lueth, T.C.; Volk, W.: Compensation for Geometrical Deviations in Additive Manufacturing. MDPI Technologies 7, 2019, 1-13 more…
  • Hartmann, C.; Opritescu, D.; Volk, W.: An artificial neural network approach for tool path generation in incremental sheet metal free-forming. Journal of Intelligent Manufacturing 30, 2019, 757-770 more…
  • Hartmann, C.; Volk, W: Variational methods in comparison to digital image correlation for full field deformation analysis under variable conditions. Determination and validation of material parameters for sheet metal simulation, Institute of Metal Forming and Casting, Technical University of Munich , 201912th Forming Technology Forum 2019, 1-7 more…
  • Hartmann, C.; Volk, W.: Knowledge-based incremental sheet metal free-forming using probabilistic density functions and voronoi partitioning. Procedia Manufacturing 29, 2019, 4-11 more…
  • Maier, D.; Hartmann, C.; Till, M.; Büdenbender, C.; Behrens, B.; Volk, W.: Data-Driven Compensation for Bulk Formed Parts Based on Material Point Tracking. Key Engineering Materials, 2019, 277-284 more…
  • Opritescu, D.; Hartmann, C.; Riedl, W.; Ritter, M.; Volk, W.: Low-risk bypassing of machine failure scenarios in automotive industry press shops by releasing overall capacity of the production networks. Journal of Manufacturing Systems 52 / Part A , 2019, 121-130 more…
  • Vitzthum, S.; Hartmann, C.; Eder, M.; Volk, W.: Temperature-based determination of the onset of yielding using a new clip-on device for tensile tests. 18th International Conference on Sheet Metal, SHEMET, 2019, 490-497 more…

2018

  • Hartmann, C.; Eder, M.; Opritescu, D.; Maier, D.; Santaella, M.; Volk, W.: Geometrical compensation of deterministic deviations for part finishing in bulk forming. Journal of Materials Processing Technology 261, 2018, 140-148 more…
  • Hartmann, C.; Wang, J.; Opritescu, D.; Volk, W.: Implementation and evaluation of optical flow methods for two-dimensional deformation measurement in comparison to digital image correlation. Optics and Lasers in Engineering 107, 2018, 127-141 more…
  • Mittler, T.; Greß, T.; Westerwick, J.; Honsel, C.; Hartmann, E.: Energie- und materialeffiziente Herstellung von Kupfer-Verbundhalbzeugen mittels Verbundgießen. Abschlussbericht 32334/01-21, 2018 more…
  • Vitzthum, S.; Eder, M.; Hartmann, C; Volk, W.: Investigation on strain dependent elastic behavior for accurate springback analysis. Journal of Physics: Conference Series Volume 1063, 2018 more…

2017

  • Eder, M.; Hartmann, C.; Opritescu, D.; Maier, D.; Volk, W.: Geometrical Compensation of Deterministic Deviations for Bulk Forming. Korea-Workshop, Sogang University (Seoul); KAIST (Daejeon), 2017 more…
  • Eder, M.; Hartmann, C.; Volk, W.: Geometriebasierte prozessbegleitende Abweichungskompensation. massivUMFORMUNG, 2017, 66-71 more…
  • Hartmann, C.; Eder, M.; Opritescu D.; Volk, W.: Process-integrated Compensation of Geometrical Deviations for Bulk Forming. International Conference on the Technology of Plasticity, Elsevier, 2017, 466-471 more…
  • Hartmann, C.; Volk, W.: Individualized sheet metal part manufacturing by an incremental free-forming process. Korea-Workshop, Sogang University (Seoul); KAIST (Daejeon), 2017 more…
  • Vitzthum, S. J.; Hartmann, C.; Weiss, H. A.; Baumgartner, G.; Hofmann, M.; Volk, W.: Determination of crystallographic young’s modulus for sheet metals by in situ neutron diffraction. Journal of Physics: Conference Series 896, 2017, 012123 more…
  • Volk W.; Weinschenk A.; Hartmann C.; Eder M.: New Strategy for Prevention and Compensation of Springback for Metal Forming Applications. HxGN LIVE 2017, 2017 more…
  • Volk, W.; Hartmann, C.; Hiller, M.; Opritescu, D.; Weinschenk, A.; Feistle, M.; Krinninger, M.: Umformen und Schneiden von Blechbauteilen – 5-1. In: Handbuch Stahl: Auswahl, Verarbeitung, Anwendung. Carl Hanser Verlag, 2017, 105-129 more…

2016

  • Opritescu, D.; Hartmann, C.; Volk, W.: Efficient parameterized characterization of manufacturing strategies for automated copied driving. Procedia CIRP  41, 2016, 1090-1095 more…
  • Volk, W.; Hartmann, C.; Feistle, M.; Gaber, C.; Jocham, D.; Weiss, H. A.: Advanced Methods in Sheet Metal Testing - Material Characterization and Prediction of Local Properties. Advanced Methods in Material Testing for Sheet Metal Forming, Institute of Metal Forming and Casting, Technical University of Munich , 20169th Forming Technology Forum 2016 , 3-8 more…