Uni.-Prof. Jens Wackerfuß - Research Information System | University of Kassel

Univ.-Prof. Dr.-Ing. Jens Wackerfuß

Research Interest

Computational mechanics
Nonlinear finite element method
Multiscale methods
Structural analysis (inelasticity, large deformations)
Localized failure, strong discontinuities
Nano mechanics, atomistic simulations
Graphene-based materials
Software development

Academic background

University of Kassel (Germany):

Since 2014 Executive Director of the Institute of Structural Mechanics
Since 2014 Full Professor of Structural Analysis
Since 2014 Head of Emmy Noether Junior Research Group

University of California, Berkeley (USA):

2007-2008 Post-doctoral Fellow

Technical University Darmstadt (Germany):

2010-2013 Head of Emmy Noether Junior Research Group
2008-2010 Senior Engineer
2005-2006 Post-doctoral Fellow
2000-2005 Research and Teaching Assistant

Engineering Consultants Mann & Bernhardt (Germany):

1997-2000 Project Manager

Dr.-Ing. (Civil Engineering)

2005 Technical University Darmstadt (Germany)

Dipl.-Ing. (Civil Engineering)

1997 Technical University Darmstadt (Germany)

Awards

2010	Emmy Noether Programme of the German Research Foundation (DFG) since 2010
2009	Zienkiewicz Medal and Prize 2008, London (UK)
2008	Research fellowship of the German Research Foundation (DFG), TU Darmstadt (Germany)
2007	Research fellowship of the German Research Foundation (DFG), UC Berkeley (USA)

Memberships and non-academic activities

since 2019	Forschungsvereinigung Baustatik und Baupraxis e. V. Mitglied
since 2019	German Association for Computational Mechanics (GACM) Membership
since 2019	Gesellschaft für angewandte Mathematik und Mechanik (GAMM) Mitglied
since 2019	International Association of Computational Mechanics (IACM) Membership

Publications

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2024	Wackerfuß, J., Boungard, J., 2024. A computationally efficient method for considering a large number of nonlinear multi-point constraints within the finite element method., in: Korobenko, A., Laforest, M., Prudhomme, S., Vaziri, R. (Hrsg.), 16th World Congress in Computational Mechanics (WCCM) 21-26 July 2024, Vancouver, Canada. Vancouver, S. tba.
2024	Ochs, J., Wackerfuß, J., 2024. FE² method to model graphene subjected to in-plane loading. Proceedings in Applied Mathematics & Mechanics 24, e202400013. https://doi.org/https://doi.org/10.1002/pamm.202400013
2024	Boungard, J., Wackerfuß, J., 2024. Master-slave elimination scheme for arbitrary smooth nonlinear multi-point constraints. Computational Mechanics 2024, 955–992. https://doi.org/10.1007/s00466-024-02463-7
2024	Boungard, J., Ortleb, S., Wackerfuß, J., 2024. Mathematical foundation of the master-slave elimination for arbitrary nonlinear multi-point constraints. PAMM Proceedings in Applied Mathematics and Mechanics 23, e202400114. https://doi.org/https://doi.org/10.1002/pamm.202400114
2024	Wackerfuß, J., Boungard, J., 2024. On the embedding of nonlinear multipoint constraints in the finite element method. , in: ECCOMAS (Hrsg.), The 9th European Congress on Computational Methods in Applied Sciences and Engineering ECCOMAS Congress 2024, 3–7 June 2024, Lisboa, Portugal. Lissabon, S. tba. https://doi.org/10.23967/eccomas.2024.234
2023	Boungard, J., Wackerfuß, J., 2023. Consideration of nonlinear multipoint constraints in finite element analyses based on a master-slave elimination scheme operating at the global level, in: GAMM (Hrsg.), PAMM Proceedings in Applied Mathematics and Mechanics. Wiley Online Library, S. e202200311. https://doi.org/10.1002/pamm.202200311
2023	Ochs, J., Wackerfuß, J., 2023. Continuous modelling of single layer 2D carbon nanostructures based on a modified Cauchy–Born rule. Proceedings in Applied Mathematics & Mechanics 23, e202300197. https://doi.org/10.1002/pamm.202300197
2022	Klarmann, S., Wackerfuß, J., Klinkel, S., 2022. A novel transition element formulation to couple beam and solid elements, in: Krieg, U. (Hrsg.), PAMM Proceedings in Applied Mathematics and Mechanics. Wiley Online Library, S. 1145 – 1166. https://doi.org/10.1007/s00466-022-02221-7
2022	Klarmann, S., Wackerfuß, J., Klinkel, S., 2022. Coupling 2D continuum and beam elements: a mixed formulation for avoiding spurious stresses. Computational Mechanics 2022, 1145–1166. https://doi.org/10.1007/s00466-022-02221-7
2021	Boungard, J., Wackerfuß, J., 2021. Derivation of Analytical, Closed-form Formulas for the Calculations of Instantaneous Screw Axes of Arbitrary Rigid 3D Multi-Body Systems, in: International Association of Applied Mathematics and Mechanics (GAMM) (Hrsg.), PAMM Proceedings in Applied Mathematics and Mechanics. Wiley Online Library, S. e202000103. https://doi.org/10.1002/pamm.202000103

Lectures

03/2024	Mathematical Foundations of the Master-Slave Elimination for Arbitrary Nonlinear Multi-Point ConstraintsOn the consideration of nonlinear multipoint constraints in nonlinear finite element analyses based on a master-slave elimination scheme operating at the global level 94th GAMM Annual Meeting, Magdeburg, Magdeburg
03/2024	Plenary for young researchers: Time-varying constraints in structural analysis: challenges, new methodology and applicationsDerivation of Analytical, Closed-form Formulas for the Calculations of Instantaneous Screw Axes of Arbitrary Rigid 3D Multi-Body Systems 15th Symposium on Structural Analysis – Building Practice, Hamburg, Hamburg
03/2024	Zeitveränderliche Zwangsbedingungen in der Baustatik: Herausforderungen, neue Methodik und AnwendungenTwo-step method for determining the instantaneous and relative instantaneous screw axes in the context of rigid 3D multibody systems , Hamburg
09/2023	Numerically stable algorithm for an automatic detection and elimination of redundant nonlinear constraints and its embedding in the Lagrange multiplier, penalty and master-slave elimination methods 10th GACM Colloquium on Computational Mechanics, Vienna, Wien
07/2023	New methods for nonlinear constraints in the FEM: Elimination of redundancies and master-slave elimination 150th North German Mechanics Colloquium, Kassel
09/2022	Consideration of nonlinear constraints in nonlinear finite element analyses using master-slave elimination at system level Baustatik Baupraxis e.V. research colloquium, Kloster Steinfeld, Kloster Steinfeld
08/2022	92nd GAMM Annual Meeting, Aachen, Aachen
03/2021	91st GAMM Annual Meeting, Kassel, Kassel - online
02/2020	145th North German Mechanics Colloquium, Hanover

Other Research Activities

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2024	Development and implementation of algorithms for the identification of constraint clusters and constraint coupling types Advising activity
2024	FEM simulations of foldabl structures taking into account nonlinear constraints for modeling actuators Advising activity
2024	Stab2d: Visualization and animation of structural systems in LATEX (Bachelor project) Advising activity
2023	Implementation of explicit Runge-Kutta methods and application in the elastodynamics of load-bearing structuresDevelopment and implementation of an algorithm for determining the yield joints and the load-bearing capacity in plane frame structures Advising activity
2022	Advising activity
2022	FEM-simulation to investigate the influence of the constraints induced by model assumptions in beams (Master project) Advising activity
2022	First-order yield-line theory for trusses (Bachelor project) Advising activity
2022	Advising activity
2022	Numerical analysis of the layer model to simulate materially non-linear beam elements Advising activity
2021	Analysis of the Concept of “flow of load” (Master project) Advising activity