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Dr.-Ing. Richard Ostwald

Dr.-Ing. Richard Ostwald

Weitere Kontaktdaten

Telefon
+49 231 755-5602

Fax
+49 231 755-2688

Sprechzeiten
by appointment

Raum 125

orcid.org/0000-0003-2147-8444

linkedin.com/in/richard-ostwald

Details

 Curriculum Vitae

 Professional Experience

04/2020–09/2020 Adjunct Professor, Faculty of Production Engineering, University of Bremen
05/2018–03/2020 Interim Professor of Mechanics, Bremen Institute of Mechanical Engineering, Faculty of Production Engineering, University of Bremen
02/2017–04/2017 Visiting Researcher, Department of Mechanical Engineering, Stanford University, CA, USA
Prof. Ellen Kuhl
since 07/2015 Senior Researcher, Institute of Mechanics, TU Dortmund University
02/2013 Visiting Researcher, Department of Mechanical Engineering, University of Zaragoza, Spain
Prof. Miguel Ángel Martínez Barca
07/2009–06/2015 Research Assistant, Institute of Mechanics, TU Dortmund University
10/2008–06/2009 Student Intern, Siemens AG, Mülheim/Ruhr
Turbines and Generators Factory, Mechanical Calculations Department
04/2005–09/2008 Student Assistant, Chair of Mechanics, TU Dortmund University
Prof. Bob Svendsen

 Academic Self-Administration

since 10/2020 Elected Member of the Structural Commission, Faculty of Mechanical Engineering, TU Dortmund University
since 10/2020 Elected Deputy Member of the Doctoral Examination Board, Faculty of Mechanical Engineering, TU Dortmund University
03/2019–03/2020 Member of the Curriculum Development Commission, Faculty of Production Engineering, University of Bremen
03/2016–04/2018 Elected Speaker of the Scientific Staff, Faculty of Mechanical Engineering, TU Dortmund University
01/2006–06/2008 Elected Student Representative in the Mechanical Engineering Faculty Council, TU Dortmund University

 Education

05/2015 Doctoral Degree (Dr.-Ing.), Thesis Title: "Modelling and simulation of phase-transformations in elasto-plastic polycrystals"
06/2009 Diploma Degree (Dipl.-Ing.), Thesis Title: "Fatigue assessment of welded steel structures based on harmonic analyses"
10/2004–09/2008 Studies of Mechanical Engineering, TU Dortmund University
Emphases: Fluid Flow Engines, Propulsion Technology, Simulation Technology

 Awards

07/2017 Selection for the Global Young Faculty Program, Mercator Research Center Ruhr
11/2016 Rudolf Chaudoire Award, TU Dortmund University
05/2016 GACM Best Ph.D. Award 2015, German Association for Computational Mechanics
12/2015 Best Thesis Award (Dissertationspreis), TU Dortmund University
09/2015 Jan Szmelter Award for the best research paper, Polish Association for Computational Mechanics
03/2010 Hans Uhde Award for exceptional study achievements, ThyssenKrupp/Uhde GmbH


 Teaching

  • Elaboration and implementation of lectures and tutorial courses for different advanced Bachelor's and advanced Master's courses, particularly
  • Tutorial courses (SS 2007–SS 2015) and lectures (WS 15/16 onwards)
  • Supervision of student theses
    • Remeshing of deformed bodies in large deformation FEM simulations using higher order elements
      Bachelor thesis – in progress
    • Analyse der dynamischen Eigenschaften eines Bugradfedersystems für ein Ultraleichtflugzeug
      Master project – completed 04/2021 (cooperation with ZARM Bremen)
      Authors: B. Ljatifi, A. Karahan
    • Solution recovery and transfer in h-adaptive finite element analyses
      Bachelor thesis – completed 04/2021
      Author: L. Sobisch
    • Distortions on selective laser melting components due to hot isostatic pressing (HIP): numerical and experimental approach
      Bachelor thesis – completed 12/2020 (cooperation with Materialise GmbH)
      Author: Y. Hachimi
    • Simulation of damage in ceramic matrix composites – an Abaqus UMAT implementation
      Bachelor thesis – completed 11/2020 (cooperation with Advanced Ceramics Bremen)
      Author: K. Cihan
    • Modelling and simulation of damage and crack propagation in engineering components
      Bachelor thesis – completed 10/2020
      Author: A. Kenfack
    • Parametric study for the determination of beam properties for a more accurate load distribution in FE-modelled multi-bolted connections
      Bachelor thesis – completed 10/2020 (cooperation with ArianeGroup SAS)
      Author: T. Hasak
    • Regelmäßige Neuvernetzung als Strategie für Finite-Element-Simulationen bei großen Verformungen in der Festkörpermechanik
      Bachelor thesis – completed 07/2020
      Author: P. Araghchi
    • Optimization and design of the shell structure of the student hybrid rocket ZEpHyR 2
      Bachelor thesis – completed 10/2019 (cooperation with ZARM Bremen)
      Author: J. Eisenmenger
    • Untersuchung von kritischen Beanspruchungen der Führungselemente eines Laufkrans mithilfe der FE-Methode
      Bachelor thesis – completed 09/2019 (cooperation with ArcelorMittal)
      Author: B. Ljatifi
    • Development of a calculation process to determine the external load on the GFEM Model of the flap structure of the A350XWB
      Bachelor thesis – completed 08/2019 (cooperation with Airbus)
      Author: G. Senkal
    • Development of finite element program modules for the simulation of extrusion processes
      Bachelor thesis – completed 08/2019
      Author: A. Borutta
    • Modeling of a Viscoelastic Polymer – Experiment, Finite Element Implementation and Parameter Identification
      Master thesis – completed 07/2019
      Author: M. Barghidarian
    • Simulation of plasticity using stress mode decompositions
      Bachelor thesis – completed 11/2018
      Author: M. Böddecker
    • Thermomechanische Ermüdung mit Modellvalidierung für die Lebensdauerberechnung eines Zylinderkopfes für einen Großdieselmotor
      Bachelor thesis – completed 10/2018 (cooperation with MAN SE)
      Author: J. Gerlach
    • Parameter identification for a visco-elastic polymer under large deformations
      Project thesis – completed 06/2018
      Author: M. Barghidarian
    • Automatisierte Abaqus-Parameterstudien für eine regularisierte Schädigungsformulierung
      Project thesis – completed 06/2018
      Author: A. Borutta
    • Simulation of shape memory alloys using stress mode dependent weighting functions
      Project thesis – completed 04/2018
      Author: M. Böddecker
    • Efficient numerical integration on the surface of a sphere
      Project thesis – completed 12/2017
      Author: H. Lammen
    • Optimierungsbasierte Kalibrierung eines visko-elastischen Materialmodells und Anwendung in der nichtlinearen FEM
      Bachelor thesis – completed 04/2017 (cooperation with KOSTAL GmbH & Co. KG)
      Author: S. Kimpel
    • Analysis of damage formulations for the finite element based simulation of forming processes
      Master thesis – completed 01/2017
      Author: A. Schowtjak
    • Implementation of a coupled model for the three-dimensional finite strain simulation of phase transformation and plasticity
      Project thesis – completed 09/2016
      Author: T. Keute
    • Implementation of hyperelastic finite strain micro-sphere models
      Bachelor thesis – completed 08/2016
      Author: H. Lammen
    • A contribution to the simulation of phase-transformations in grinding processes
      Project thesis – completed 05/2016
      Author: J. Grodotzki
    • A finite deformation thermo-elastic micro-sphere model for rubber-like materials
      Master thesis – completed 04/2016
      Author: P. Oppermann
    • Experiments and algorithmic treatment of material parameter identification utilizing optical displacement field measurements
      Master thesis – completed 02/2016
      Author: L. Rose
    • Zur Optimierung des Designs von Antriebstrommeln inklusive FKM-Dauerfestigkeitsnachweis
      Bachelor thesis – completed 11/2015 (cooperation with CAE Engineering und Service GmbH)
      Author: T. Keute
    • Fibre-Reinforced Composites – Finite Deformation Higher-Gradient Theory and Mixed Finite Element Formulation
      Master thesis – completed 10/2015
      Author: T. Asmanoglo
    • Optimization-based Parameter Identification for Inhomogeneous Problems
      Project thesis – completed 07/2015
      Author: L. Rose
    • Analyse von Effizienz und Stabilität verschiedener Zeitintegrationsverfahren zur Lösung von Differentialgleichungssystemen eines Festkörper-Phasentransformationsmodells
      Project thesis – completed 04/2015
      Author: S. Dohm
    • Calibration of Anisotropic Yield Surfaces Based on Kelvin Mode Decomposition
      Project thesis – completed 10/2013
      Author: T. Asmanoglo
    More details on open student thesis topics are provided here.


 Research

  • Projects
  • Research Interests
    • Material modelling: thermodynamically consistent modelling of phenomena such as damage, plasticity, solid state phase transformations and temperature evolution in materials of technological interest within the geometrically nonlinear framework of generalised standard materials and beyond, including the embedding in FEA software
    • Multi-scale modeling/homogenisation: development of numerical frameworks for the microstructure simulation and homogenisation of high-resolution material models in the transition from nano/micro to meso/macro scale, e.g. by utilisation of the microsphere/microplane approach for the multi-scale modeling of anisotropic solids
    • Multi-field/coupled problems: formulation and efficient, monolithic numerical solution of multi-field problems, e.g. in the context of full thermomechanical coupling, gradient-enhanced damage formulations, or formally related problems
    • Inverse problems/optimisation: adaptation of methods of non-linear programming, including methods of different order in connection with active set and penalty strategies for constrained optimisation with application e.g. in the context of DIC-based parameter identification
    • Machine learning: adaptation of machine learning methods, specifically artificial neural networks (in particular feedforward ANNs such as multilayer perceptrons and recurrent ANNs like LSTM) to problems in engineering mechanics, especially in the area of inverse problems
  • Conference Organization
    • Organiser and Chair, 143rd Northern German Mechanics Colloquium, University of Bremen, February 2019
    • Chair of session Crystal Mechanics: 7th GACM Colloquium on Computational Mechanics, University of Stuttgart, October 2017
    • Chair of session Computational Materials Science: 3rd ECCOMAS Young Investigators Conference / 6th German Association for Computational Mechanics Colloquium (YIC/GACM), RWTH Aachen University, July 2015
  • Laboratory Supervision
    • Walter+Bai combined tension/compression/torsion testing machine
    • GOM Aramis 3D optical deformation analysis system
    • InfraTec ImageIR thermal imaging system
    • Zeiss SteREO Discovery V20 digital microscope
    • Kammrath & Weiss micro-testing machine
    Details on the experimental equipment are provided here.
  • Further Activities
  • Active Memberships
    • German Association for Computational Mechanics (GACM)
    • European Community on Computational Methods in Applied Sciences (ECCOMAS)
    • International Association for Computational Mechanics (IACM)
    • International Association of Applied Mathematics and Mechanics (GAMM)
    • Materials Chain – Key Research Initiative of the University Alliance Ruhr
    • German Association of University Professors and Lecturers (DHV)


 Publications

 Theses

 2015
 2009
  • R. Ostwald
    Fatigue assessment of welded steel structures based on harmonic analyses,
    Diploma Thesis, Siemens AG, 2009

 Journals

 2021
  • A. Schowtjak, R. Schulte, T. Clausmeyer, R. Ostwald, A. E. Tekkaya, A. Menzel
    ADAPT – A Diversely Applicable Parameter Identification Tool: Overview and Full-Field Application Examples,
    submitted for publication, 2021
 2020
 2019
 2018
  • R. Ostwald, T. Bartel, A. Menzel
    A finite strain continuum framework for the simulation of phase transformations based on representative transformation orientations,
    accepted for publication, 2018
 2016
 2015
 2014
 2013
  • T. Bartel, A. Bartels, U. Ehlenbröker, R. Mahnken, A. Menzel, J. Mosler, R. Ostwald, A. Schneidt, M. Wolff
    Modeling and Simulation of Solid Materials,
    In: Functionally Graded Materials in Industrial Mass Production – Fundamentals, ISBN 978-3-942267-92-2, pp. 113–128, 2013
 2012
 2011
 2010
 2009

 Proceedings

 2021
 2017
 2016
 2015
 2012
  • R. Ostwald, T. Bartel, A. Menzel
    A multi-scale model for the interaction of phase-transformations and plasticity in polycrystalline solids
    Proceedings of the 6th European Congress on Computational Methods in Applied Sciences and Engineering (ECCOMAS), 2012
 2011
 2010

 Talks

 2021
  • A gradient-enhanced damage modelling framework for metal forming simulations – application and calibration
    European Structural Integrity Society (ESIS) Technical Meeting on Numerical Methods (TC8), University of Belgrade, Serbia (online), 2021
 2020
  • Zur mikromechanisch motivierten Modellierung und Simulation komplexer CMC-Bauteile
    CU-Thementag Ceramic Composites / Arbeitskreis Verstärkung keramischer Werkstoffe (DKG/DGM), Augsburg (online), 2020
  • Aspects of implementation of regularised continuum damage for complex FE analyses
    European Structural Integrity Society (ESIS) Technical Meeting on Numerical Methods (TC8), University of Munich UniBwM, Neubiberg, Germany, 2020
 2019
  • Kombination von regularisierter duktiler Schädigung und Plastizität für die Simulation von Umformprozessen
    143rd Northern German Mechanics Colloquium (143. Norddeutsches Mechanik-Kolloquium), University of Bremen, Germany, 2019
 2018
  • Towards the simulation of complex metal forming processes: combination of regularised damage and contact
    Vierte Sitzung der Arbeitsgruppe Simulation des Arbeitskreises Bruchmechanik und Bauteilsicherheit des Deutschen Verbandes für Materialforschung und -prüfung e.V. (DVM), Institute of Forming Technology and Lightweight Components (IUL), TU Dortmund, Germany, 2018
  • A computational framework for the simulation of regularised damage
    Materials Science and Engineering (MSE) Congress, Darmstadt University of Technology, Germany, 2018
  • Implementation of a gradient-enhanced damage model – a heat equation-based framework
    6th European Conference on Computational Mechanics (Solids, Structures and Coupled Problems) – ECCM 6, Glasgow, Scotland, UK, 2018
 2017
  • Modelling and Simulation of phase transformations in elasto-plastic polycrystals
    Invited Plenary Talk, 7th GACM Colloquium on Computational Mechanics, University of Stuttgart, Germany, 2017
  • A regularised damage formulation for the application in commercial finite element codes
    Invited Talk, E. Kuhl Seminar, Stanford University, CA, USA, Apr 2017
  • Modelling and computation of deformation-induced anisotropy in metal alloys
    Invited Talk, E. Kuhl Seminar, Stanford University, CA, USA, Feb 2017
 2016
  • Modellierung und Simulation anisotroper Festkörper
    Invited Talk, Rudolf Chaudoire Pavillon, TU Dortmund University, Germany, 2016
  • A thermodynamically consistent finite strain micro-sphere framework for phase-transformations
    7th European Congress on Computational Methods in Applied Sciences and Engineering (ECCOMAS Congress 2016), Crete Island, Greece, 2016
  • Extending a finite strain hyperelastic micro-sphere framework towards phase transformations
    Joint Annual Meeting of GAMM and DMV, TU Braunschweig, Germany, 2016
 2015
  • Modelling and Simulation of temperature-dependent phase-transformations in elasto-plastic SMA polycrystals
    3rd Spring School on Simulation-Based Microstructure Design (SiMiDe), Hamminkeln, Germany, 2015
  • A micro-mechanically motivated finite deformation thermo-elastoplastic framework for martensitic phase-transformations
    3rd ECCOMAS Young Investigators Conference / 6th German Association for Computational Mechanics Colloquium (YIC/GACM), Aachen, Germany, 2015
  • Modellierung und Simulation thermo-mechanisch induzierter Phasentransformationen in Stahlwerkstoffen
    SFB/Transregio 30 Abschlusskolloquium, Gießhaus, University of Kassel, Germany, 2015
  • A framework for the simulation of phase-transforming elasto-plastic SMA and TRIP steel polycrystals
    3rd Polish Congress of Mechanics/21st International Conference on Computer Methods in Mechanics (PCM/CMM), Gdansk, Poland, 2015
 2014
  • A finite deformation framework for phase-transformations interacting with plasticity and its robust numerical solution
    IWCMM24 – XXIV International Workshop on Computational Micromechanics of Materials, IMDEA Materials Institute, Madrid, Spain, 2014
 2013
  • Simulation of temperature-dependent phase-transformations and plasticity in polycrystalline metals based on Gibbs energy barriers
    Invited Talk, University of Zaragoza, Spain, 2013
  • A micromechanically motivated material model for polycrystalline SMA
    International Workshop on New Trends in Solid Mechanics: Coupled Fields and Multi-scale Modelling, Castro Urdiales, Spain, 2013
  • Simulation of plasticity and martensitic phase-transformations based on representative transformation directions
    XII International Conference on Computational Plasticity (COMPLAS XII), Barcelona, Spain, 2013
  • Efficient Assessment of In-Process Phase-Transformations – Application to Machining Processes
    6. Forum Metallplastizität / 26. Workshop Composite Forschung in der Mechanik, Liborianum Paderborn, Germany, 2013
 2012
  • Experimental and computational investigation of machining processes for functionally graded materials
    1st CIRP Conference on Surface Integrity (CSI), Bremen, Germany, 2012
  • Simulation of phase-transformations based on numerical minimization of intersecting Gibbs energy potentials
    83rd GAMM Annual Meeting, Darmstadt University of Technology, Germany, 2012
  • Modelling and Simulation of phase-transformations in polycrystalline materials with application to machining processes
    19. Sitzung der TRR30 AG Eigenschaftscharakterisierung, Institut für spanende Fertigung (ISF), TU Dortmund, Germany, 2012
  • A multi-scale model for the interaction of phase-transformations and plasticity in polycrystalline solids
    6th European Congress on Computational Methods in applied Sciences and Engineering (ECCOMAS Congress 2012), University of Vienna, Austria, 2012
  • Zerspanung von gradierten Flanschwellen
    2. Sitzung des Industriebeirates des SFB/Transregio 30, Lehrstuhl für Werkstofftechnik (LWT), TU Dortmund, Germany, 2012
  • Modelling and Simulation of Phase-Transformations and Plasticity in Steel
    1st International Conference on Thermo-Mechanically Graded Materials, Kongress Palais Kassel, Germany, 2012
 2011
  • A multi-phase micro-sphere-based model for phase-transformations interacting with plastic deformations
    10th GAMM-Seminar on Microstructures, Darmstadt University of Technology, Germany, 2011
  • Interaction of phase-transformations and plasticity – a multi-phase micro-sphere approach
    82nd GAMM Annual Meeting, Grazer Congress, Graz, Austria, 2011
  • Computational modelling of phase-transformations interacting with plasticity – combination of a Gibbs-energy-barrier-based transformation criterion with a plastic inheritance approach
    21st International Workshop on Computational Mechanics of Materials, University of Limerick, Ireland, 2011
  • Mikromechanisch motivierte Modellierung und Simulation der temperaturabhängigen Interaktionen zwischen Phasentransformationen und Plastizität
    5. Forum Metallplastizität / 24. Workshop Composite Forschung in der Mechanik, Liborianum Paderborn, Germany, 2011
 2010
  • A micro-sphere approach applied to the modelling of phase-transformations
    81st GAMM Annual Meeting, KIT Karlsruhe Institute of Technology, Karlsruhe, Germany, 2010
  • Zur Modellierung und Simulation thermomechanisch induzierter Phasentransformationen in Stahlwerkstoffen
    1st TRR30 Workshop on Modeling and Simulation, TU Dortmund, Germany, 2010
  • A micro-sphere approach applied to the simulation of phase transformations interacting with plasticity
    23rd Nordic Seminar on Computational Mechanics (NSCM-23), KTH Royal Institute of Technology, Stockholm, Sweden, 2010
 2009
  • Fatigue assessment of welded steel structures based on harmonic analyses
    Siemens AG, Mülheim/Ruhr, Germany, 2009
 2008
  • Modeling and simulation of electromagnetic forming processes: a combination of ANSYS and FEAP
    Institute of Mechanics, TU Dortmund, Germany, 2008
 2007
  • Development of finite element program modules for the simulation of electromagnetic forming
    Institute of Mechanics, TU Dortmund, Germany, 2007

 Poster

 2020
  • R. Schulte, R. Ostwald, T. Kaiser, A. Menzel
    Machine learning for parameter identification and model reduction of gradient-enhanced damage models for metal forming processes,
    GAMM Juniors' Summer School on Applied Mathematics and Mechanics ("Learning Models from Data: Model Reduction, System Identification and Machine Learning"), Max Planck Institute for Dynamics of Complex Technical Systems, Magdeburg, 2020
  • A. Schowtjak, R. Schulte, T. Clausmeyer, R. Ostwald
    Model integration for process simulations,
    2nd SFB/Transregio 188 Industrial Colloquium, RWTH Aachen University, 2020
 2018
  • R. Ostwald, L. Sprave, R. Schulte, A. Menzel
    A gradient-enhanced damage implementation for the simulation of damage in metal forming processes,
    2nd Materials Chain International Conference (MCIC), Ruhr University Bochum, 2018
  • A. Schowtjak, T. Clausmeyer, R. Ostwald
    Modellintegration für die Prozesssimulation,
    SFB/Transregio 188 Industriekolloquium, Congress Center Westfalenhallen Dortmund, 2018
  • R. Ostwald, E. Kuhl, A. Menzel
    A computational framework for the simulation of regularised damage,
    Materials Science and Engineering (MSE) Congress, Darmstadt University of Technology, 2018
 2016
  • T. Clausmeyer, R. Ostwald
    Wissenschaftliches Serviceprojekt: Modellintegration für die Prozesssimulation – Zielsetzung,
    SFB/Transregio 188 Project Application, Institute of Forming Technology and Lightweight Components (IUL), TU Dortmund University, 2016
  • T. Clausmeyer, R. Ostwald
    Wissenschaftliches Serviceprojekt: Modellintegration für die Prozesssimulation – Arbeitsplan,
    SFB/Transregio 188 Project Application, Institute of Forming Technology and Lightweight Components (IUL), TU Dortmund University, 2016
  • T. Clausmeyer, R. Ostwald
    Wissenschaftliches Serviceprojekt: Modellintegration für die Prozesssimulation – Vorarbeiten,
    SFB/Transregio 188 Project Application, Institute of Forming Technology and Lightweight Components (IUL), TU Dortmund University, 2016
 2015
  • R. Ostwald, T. Bartel., A. Menzel
    Modelling and simulation of phase-transformations in elasto-plastic SMA and TRIP steel polycrystals,
    3rd Spring School on Simulation-Based Microstructure Design (SiMiDe), Akademie Klausenhof, Hamminkeln, 2015
  • R. Ostwald, T. Bartel, B. Kiefer, A. Menzel
    Modelling and Simulation,
    Materials Chain Kick-off meeting, Ruhr University Bochum, 2015
 2014
  • R. Ostwald, T. Bartel, A. Menzel
    Modellierung und Simulation thermo-mechanisch induzierter Phasentransformationen in Stahlwerkstoffen – Antragsposter,
    SFB/Transregio 30, 2nd Interim Evaluation, Paderborn University, 2014
  • R. Ostwald, T. Bartel, A. Menzel
    Modellierung und Simulation thermo-mechanisch induzierter Phasentransformationen in Stahlwerkstoffen – Berichtsposter,
    SFB/Transregio 30, 2nd Interim Evaluation, Paderborn University, 2014
 2012
  • R. Ostwald, T. Bartel, A. Menzel, M. Tiffe, D. Biermann, M. Lebsanft, B. Scholtes
    Modelling and simulation of the interactions between phase-transformations and plasticity in steel,
    11th GAMM-Seminar on Microstructures, Essen, SFB/Transregio 30 Cluster Poster – Research Projects A3/B6/D2, 2012
  • D. Biermann, A. Menzel, T. Bartel, F. Höhne, R. Holtermann, R. Ostwald, B. Sieben, M. Tiffe, A. Zabel
    Experimental and computational investigation of machining processes for functionally graded materials,
    1st CIRP Conference on Surface Integrity (CSI), Bremen, SFB/Transregio 30 Cooperation Poster – Research Projects A3/B6, 2012
 2010
  • R. Ostwald, T. Bartel, A. Menzel
    Modellierung und Simulation thermo-mechanisch induzierter Phasentransformationen in Stahlwerkstoffen (I),
    SFB/Transregio 30, 1st Interim Evaluation, Institute of Machining Technology (ISF), TU Dortmund, 2010
  • R. Ostwald, T. Bartel, A. Menzel
    Modellierung und Simulation thermo-mechanisch induzierter Phasentransformationen in Stahlwerkstoffen (II),
    SFB/Transregio 30, 1st Interim Evaluation, Institute of Machining Technology (ISF), TU Dortmund, 2010