Courses

• Nonlinear Continuum Mechanics (SS 20, SS 21, SS22)
• Introduction to Theory of Materials (SS 17, SS 18, SS19)
• Advanced Simulation Methods in Metal Forming I (SS 16)
• Parameter Identification (SS 16)
• Finite Element Methods I (WS 12/13 to WS 15/16, WS 18/19)
• Finite Element Methods II (SS 13, SS 14, SS 15)
• Introduction to Numerical Methods (WS 12/13)
• Tensor Calculus (SS 10 to SS 14)
• Machine Dynamics (WS 15/16, WS 16/17, WS 17/18, WS 20/21, WS 21/22)
• Mechanics I (WS 10/11, WS 19/20), formerly "Mechanics A".
• Mechanics B (SS 11, SS 17)
• Mechanics C (WS 11/12, WS 16/17, WS 18/19)
• Mechanics D (SS 18)
• Engineering Mechanics BCI/Log/W'Ing (WS 08/09, WS 13/14,WS 14/15)
• Higher Strength of Materials (not offered anymore)

Short Courses / Seminars / Schools

• "Application of energy relaxation to model inelastic material behavior" - 1st Young Researchers' Workshop of the GAMM seminar on Microstructures, Freiburg, Jan 23, 2020.
• "A micromagnetics-inspired framework for the simulation of multiferroic constitutive behavior" - FOR 1509 winter school 2017, Feb. 21, 2017
• "On laminate-based homogenization and its relation to energy relaxation" - Colloquium for Mechanics (invitation Prof. Dr.-Ing. Thomas Böhlke), Karlsruhe Institute of Technology (30.06.2016).
• "Aspects of Energy Relaxation Methods for the Modeling of Solid-Solid Phase Transformations" - 1st Spring School Simulation-Based Microstructure Design of Materials (SiMiDe), Bochum, Germany.
• "Energy Relaxation and its Relation to Homogenization Procedures in the Context of Solid-Solid Phase Transformations" - Summer School Collaborative Research Centre Transregio 30
• "Mechanical Modeling of Martensitic Phase Transformations by Energy Relaxation" - VDI-Seminar University of Siegen (Invitation Prof. Dr.-Ing. Kerstin Weinberg), 16.11.2010
• "Modeling of Microstructure Evolution in Solids" - COMMAS Summer School 2009 University of Stuttgart (invitation Prof. Dr.-Ing. Christian Miehe), 2009.
• "Multiscale modeling of martensitic phase transformations in shape memory alloys using relaxed energy potentials" - Mathematics Seminar TU Dortmund (invitation Prof. Dr. Ben Schweizer), 23.04.2009.

Supervision of project, bachelor and master theses

We offer plenty of topics for student's theses. Interested students may contact me via email or phone. Please note, that the attendance of advanced courses at our institute is advantageous and almost necessary for a successful execution.

An overview of the proposed topics can be found here.

main topics

• data-driven modeling and simulation of inelastic material behavior
• modeling and simulation of multiferroic constitutive response in, e.g., magnetic shape memory alloys
• modeling of phase changes during additive manufacturing (e.g. selective laser melting)
• modeling and simulation of functional fatigue in shape memory alloys
• modeling and simulation of the thermomechanically coupled behavior of shape memory alloys
• micromechanical modeling of martensitic phase transformations
• interactions of martensitic phase transformations and plasticity - shape memory alloys, TRIP-steels
• energy relaxation methods
• computational homogenization via Multiscale FEM (^FE2)

reviewing for the following journals

• Mechanics of Materials
• Materials Science & Engineering A
• International Journal of Engineering Science
• European Journal of Mechanics - A/Solids
• Journal of Intelligent Material Systems and Structures
• Computational Materials Science
• Advanced Modeling and Simulation in Engineering Sciences
• International Journal of Mechanical Sciences
• Journal of Manufacturing Processes
• Journal of Manufacturing and Materials Processing
• Materials & Design
• International Journal of Mechanical Sciences
• Engineering Mechanics
• SpringerPlus
• International Journal of Structural Changes in Solids

further activities

• Coordinator of the GAMM Activity Group "Modern teaching and didactics in mathematics and mechanics
• elected member of the faculty council of the department of mechanical engineering (2014 until today)
• elected member of the commission "Committee for Quality Improvement Means" (2016 until today)
• elected deputy member of the following commissions and committees: "Studienbeirat" (2016 until today), "Prüfungsausschuss Bachelor" (2016-2018), "Prüfungsausschuss Master" (2016-2018), and "Strukturkommission" (2016-2018)
• organization of the invited session "Constitutive modelling and advanced simulation techniques for the simulation of AM processes" at the ECCOMAS Thematic Congerence Sim-AM II, Pavia (Italy), September 11-13
• guest editor for the "International Journal of Structural Changes in Solids", February 2011, Volume 3 No. 1
• organization of the minisymposium "Microstructural Interactions in Inelastic Solids" -- 81st GAMM annual meeting, Karlsruhe, 2010

Projects

• DFG, SPP 2256, "Variational Methods for Predicting Complex Phenomena in Engineering Structures and Materials" - Project 3: "Multiscale systems of plasticity in a data-driven perspective".
• DFG, TRR30, "Modeling and simulation of thermo-mechanically induced phase transformations in steel materials"
• DFG, FOR 1509, "Ferroic functional materials: multiscale modeling and experimental characterization"
• MERCUR/MERCATOR, PR-2013-0048, "Micromechanical modeling and simulation of functional fatigue of single and polycrystalline shape memory alloys"

2019

Thermomechanically coupled finite-element-based modeling and simulation of phase transitions during selective laser melting processes ECCOMAS Thematic Congerence Sim-AM II, Pavia (Italy), September 11-13.

On the modeling and simulation of phase-transforming magnetic solids using energy relaxation and FEM 6th ICMM, Lund (Sweden), June 26-28

A finite-element framework for the modelling and simulation of phase-transforming magnetic solids using energy relaxation concepts 90th GAMM Annual Meeting, Vienna (Austria), February 18-22

On the derivation of relaxed energy densities using perturbations of curl- and div-free fields 18th GAMM Seminar on Microstructures, Berlin, January 18-19

2018

A magnetomechanically coupled FE-framework based on energy-minimising microstructure evolution 2nd Materials Chain International Conference, Bochum, November 12-14,

One the modeling and simulation of selective laser melting using a phase transformation approach 10th European Solid Mechanics Conference, Bologna (Italy), July 2-6,

Derivation of energy bounds via perturbations of curl- and div-free fields: application to magnetizable solids 3rd Seminar on the Mechanics of Multifunctional Materials, Bad Honnef, June 11-15,

Energy relaxation schemes for magnetizable solids using perturbations of divergence- and curl-free fields 17th GAMM Seminar on Microstructures, Firenze (Italy), January 25-26,

2017

Towards a micromagnetics-inspired framework for the modeling of variant switching in magnetic shape memory alloys 88th GAMM Annual Meeting, Ilmenau/Weimar, March 6-10.

A thermomechanically coupled model for the modelling and simulation of the cyclic behaviour of NiTi shape memory alloy wires 5th International Conference on Material Modeling, Rome (Italy), June 14-16

A Finite-Element-based macroscopic framework for the modelling of variant switching in MSMA 3rd Seminar on Ferroic Functional Materials, Kassel, October 4-6

Towards the modeling and simulation of additive manufacturing via phase transformation models ECCOMAS Thematic Congerence Sim-AM, Munich, October 11-13

2016

A phenomenological framework for the modeling of functional fatigue in NiTi wires 87th GAMM Annual Meeting Braunschweig, March 7-11

A variational framework for the modeling of variant switching and reorientation in MSMA using energy relaxation methods 40th Solid Mechanics Conference, Warsaw (Poland), October 29-September 2

Modeling and simulation of moving interfaces in solids undergoing martensitic phase transformations 15th European Mechanics of Materials Conference, Brussels (Belgium), September 7-9

2015

A novel contribution to the relaxation of non-convex energy density functionals 86th GAMM Annual Meeting Lecce (Italy), March 23-27.

Phase transformations interacting with plasticity - Constitutive modeling and numerical simulations 7th International Symposium on Defect and Material Mechanics (ISDMM) Bremen, Germany, September 14-17

Application of quasiconvex analysis: Enhanced micromechanical modeling of martensitic phase transformations and numerical implementation 21st International Conference on Computer Methods in Mechanics (CMM) Gdańsk (Poland), September 8-11

2014

A micromechanical model for continuous twin formation during martensitic phase transformations 85th GAMM Annual Meeting Erlangen, Germany, March 10-14 On the continuous modeling and simulation of twin formation during martensitic phase transitions 13th GAMM seminar on microstructures Bochum, Germany, February 17-18

2013

A phase-transformation-plasticity model for polycrystalline materials based on representative crystal orientations 12th GAMM seminar on microstructures Berlin, February 8-9

2012

A thermodynamically consistent framework for martensitic phase transformations interacting with plasticity 83rd GAMM annual meeting, Darmstadt A polycrystalline framework for martensitic phase transformations interacting with plasticity 3rd International Symposium Computational Mechanics of Polycrystals, Bad Honnef A Large-Strain Model for Phase-Transformation-Plasticity- Interactions in Steels 8th European Solid Mechanics Conference, Graz (Austria)

2011

A thermodynamically consistent model for materials undergoing martensitic phase transformations 82nd GAMM annual meeting, Graz (Austria) A material model for polycrystalline materials undergoing martensitic phase transformations coupled with plasticity 2nd International Conference on Material Modeling (ICMM), Paris (France)

2010

Relaxation-based modeling of the interaction between martensitic phase transformations and plasticity 81st GAMM annual meeting, Karlsruhe Relaxation-based modeling of the interaction between martensitic phase transformations and plasticity 9th GAMM seminar on microstructures, Stuttgart On the modeling of the interaction between martensitic phase transformations and plasticity via energy relaxation IV European Conference on Computational Mechanics (ECCM), Paris (France) Micromechanical modeling of the interaction between martensitic phase transformations and PLasticity AK Stoffgesetze/Forum Metallplastizität, Berlin

2009

Enhanced micromechanical modeling of martensitic phase-transitions in shape-memory alloys 1st Sino-German Workshop on Advanced and Multiscale Material Modeling, Dortmund Enhanced micromechanical modeling of martensitic phase-transitions considering plastic deformations 8th ESOMAT, Prague (Czech Republic) On the modeling of materials undergoing martensitic phase transformations in combination with plastic deformations 4th ISDMM, Trento (Italy) Multiscale modeling of martensitic phase transformations in shape memory alloys 3rd GAMM Workshop on Multiscale Material Modeling, Karlsruhe, Germany On heterogeneous mesostructures induced by precipitates embedded in a shape-memory-alloy matrix 80th GAMM Annual Meeting, Gdańsk (oland) On relaxation methods for solid-solid phase transitions: Micromechanical modeling, FE-application and discussion 9th GAMM Seminar on Microstructures, Regensburg.