Prof. Dr. Stefan Sandfeld

Director of the Institute for Advanced Simulation

Materials Data Science and Informatics (IAS-9)

Forschungsthemen

machine learning, data mining, computational material science, research data management

Kontakt

+49 241/927803-11

E-Mail

ORCID

Adresse

Forschungszentrum Jülich GmbH
Wilhelm-Johnen-Straße
52428 Jülich

Institute for Advanced Simulation (IAS)

Materials Data Science and Informatics (IAS-9)

Gebäude TZA-Aachen / Raum D1.15

Vita

Professional Experience

since October 2020: Director of the IAS-9 – Materials Data Science and Informatics, Forschungszentrum Jülich GmbH
since October 2020: W3 Professor (full), Chair of Materials Data Science and Materials Informatics, Faculty of Georesources and Materials Engineering, RWTH Aachen, Germany
10/2020-01/2017: W2 Professor (full), Chair of Micromechanical Materials Modelling, Faculty of Mechanical, Process and Energy Engineering, TU Bergakademie Freiberg (TUBAF), Germany & Dean of Study for the International Master’s Program “Computational Materials Science” at TUBAF
04/2012–12/2016: Senior Scientist (Akademischer Rat), Department of Materials Science and Engineering, Friedrich-Alexander University Erlangen-Nürnberg (FAU); permanent position since 06/2014
04/2012-12/2016 Deputy Head of Institute at the Institute of Materials Simulation (Prof. Zaiser), FAU & Head of the research group ’Deformation of heterogenous materials’
04/2011–03/2012: Group leader at IZBS (Prof.Gumbsch), Karlsruhe Institute of Technology (KIT), Germany
02/2011–05/2011: Visiting scientist at Florida State University, Department of Scientific Computing (Prof. El-Azab), USA
05/2010–03/2011: Post-doctoral researcher at IZBS (Prof. Gumbsch), Karlsruhe Institute of Technology, Germany
04/2007–04/2010: Research associate at IZBS (Prof. Gumbsch), KIT, Germany
01/2006–03/2007: Early stage researcher in the European Marie Curie Research Training Network SizeDepEn, at ’The University of Edinburgh’ (Prof. Zaiser), UK
11/2005–12/2005: Research associate at University of Karlsruhe, IZBS - Institut für Zuverlässigkeit von Bauteilen und Systemen, Germany
05/2005–10/2005: Research associate at Fraunhofer Institute for Mechanics of Materials IWM, Freiburg, Germany

University Education

05/2010: PhD viva at ’The University of Edinburgh’, UK (cooperative PhD research at KIT, Germany and The University of Edinburgh, UK). Degree: PhD
10/2004–05/2005: Master’s Thesis at Fraunhofer Institute for Mechanics of Materials IWM, Freiburg: “A comparative study on the use of numerical and analytical gradients in parameter identification”
2003–05: Master of Science studies in COMMAS (Computational Mechanics of Materials and Structures) at University of Stuttgart, Germany. Degree: MSc
1997–03: Studies of Civil Engineering at the University of Applied Sciences, Cologne, Germany. Degree: Diplom-Ingenieur (FH)
1994–97: Studies of Physics and Mathematics at the University of Münster, Germany. Additionally: practical and theoretical preparations for the entrance examination at the faculty of Musics, main instrument: piano.

Awards

2017 ERC Starting Grant “A Multiscale Dislocation Language for Data-Driven Materials Science” (MuDiLingo)
2016 Highlight Paper of the Year 2015 in MSMSE
2015 Cover Article in MSMSE, Two Highlight Papers of the Year 2014 in MSMSE
2014 Teaching Award, Friedrich-Alexander University Erlangen-Nürnberg, Germany
2010 Invited Feature Paper in Journal of Materials Research
2003 Dr. Perthel Thesis Award at the University of Applied Sciences, Köln, Germany

Activities in Scientific Panels and Advisory Boards

since 2022: Representative of the FZJ in the council of the Centre Européen de Calcul Atomique et Moléculaire (CECAM)
2019: Elected member of the Review Board of the German Research Foundation (DFG) in the subject area Computational Materials Design and Materials Simulation from the atomic to the microscopic scale
Chairman of the DGM Technical Committee (“Fachausschuss”) Modelling, Simulation and Materials Data Science
Chairman of the DGM working group (“Arbeitskreis”) 3D Materials Data Science
since 2017: member of the review panel of the Swedish Research Council, SRC, in the field of “Natural and Engineering Sciences”

Further Scientific Activities

One of the main organizers of the NFDI (National Research Data Initiative) consortium NFDI MatWerk of the German materials science community
Organizer and lecturer of the DGM training courses Machine Learning: Foundations and material scientific applications
Since 2019: member of the editorial board of theSpringer journal Materials Theory

Publikationen

List of peer reviewed publications

Govind, K. ; Oliveros, D. ; Dlouhy, A. ; Legros, M. ; Sandfeld, S. Deep learning of crystalline defects from TEM images: a solution for the problem of ‘never enough training data’. Machine learning: science and technology 5(1), 015006 - (2024)
Ruzaeva, K. ; Govind, K. ; Legros, M. ; Sandfeld, S. Instance Segmentation of Dislocations in TEM Images. 2023 IEEE 23rd International Conference on Nanotechnology (NANO), Jeju City, Korea, 2 Jul 2023 - 5 Jul 2023 IEEE 1-6 (2023)
Demirci, A. ; Steinberger, D. ; Stricker, M. ; Merkert, N. ; Weygand, D. ; Sandfeld, S. Statistical analysis of discrete dislocation dynamics simulations: initial structures, cross-slip and microstructure evolution. Modelling and simulation in materials science and engineering 31(7), 075003 - (2023)
Steiner, J. ; Nguyen, B. D. ; Sandfeld, S. ; Wellmann, P. J. Prevention of Bunched Basal Plane Dislocation Arrays in 4H-SiC PVT-Growth. Solid state phenomena 343, 9 - 14 (2023)

Strobl, R., Budnitzki, M., Sandfeld, S. Dislocation Motion Induced by Thermally Driven Phase Transformations. Proceedings in Applied Mathematics and Mechanics 23, e202200244 (2023)
Steiner. J., Nguyen, B. D., Sandfeld, S., Wellmann, P. J. Prevention of Bunched Basal Plane Dislocation Arrays in 4H-SiC PVT-Growth. Solid State Phenomena 343:9-14 (2023)
Wellmann, P. J., Steiner, J., Strüber, S., Arzig, M., Salamon., M., Uhlmann, N., Nguyen, B. D., Sandfeld, S. The processing chain of the wide bandgap semiconductor SiC – How small steps enabled a mature technolog. Diamond and Related Materials 136(6):109895 (2023)
Fehlemann, N., Aguilera, A.L.S., Sandfeld, S., Bexter, F., Neite, M., Lenz, D., Könemann, M. and Münstermann, S. Identification of martensite bands in dual phase steels – a deep learning object detection approach using Faster R-CNN. Steel Research International (2023)
Nguyen, B. D., Roder, A., Danilewsky, A., Steiner, J., Wellmann, P., Sandfeld S. Automated analysis of X-ray topography of 4H-SiC wafers: Image analysis, numerical computations, and artificial intelligence approaches for locating and characterizing screw dislocations. Journal of Materials Research (2023).
Steinberger, D., Issa, I., Strobl, R., Imrich, P.J., Kiener, D., Sandfeld, S. Data-mining of in-situ TEM experiments: Towards understanding nanoscale fracture. Computational Materials Science 216, 111830 (2023)

D. Steinberger, I. Issas, P. J. Imrich, D. Kiener, S. Sandfeld. Understanding nanoscale fracture through data-mining of in-situ TEM experiments, submitted to Nature NPJ Computational Materials
S. Sandfeld, T. Steinbrecher, H. Bale, T. Speck, R. Schwaiger. The vigorous climber Boston ivy - deciphering the evolutionary self-optimization of the attachment system through data-mining, Nature Communications (under review)
A. Prakash, S. Sandfeld. Automated Analysis of Continuum Fields from Atomistic Simulations Using Statistical Machine Learning. Advanced Engineering Materials 2200574 (2022)
S. Roy, A. Prakash, S. Sandfeld, 2022. Sintering of alumina nanoparticles: comparison of interatomic potentials, molecular dynamics simulations, and data analysis. Modelling and Simulation in Materials Science and Engineering 30(6), 065009
H. Schlenz, S. Sandfeld, S, 2022. Applications of Machine Learning to the Study of Crystalline Materials. Crystals 12(8), 1070
M. Vimal, S. Sandfeld, A. Prakash, 2022. Grain segmentation in atomistic simulations using orientation-based iterative self-organizing data analysis, Materialia 21, 2589-1529
P.J. Wellmann, M. Arzig, J. Ihle, M. Kollmuss, J. Steiner, M. Mauceri, D. Crippa, F. La Via, M. Salamon, N. Uhlmann, M. Roder, A.N. Danilewsky, B.D. Nguyen, S. Sandfeld, 2022. Review of Sublimation Growth of SiC Bulk Crystals. Materials Science Forum 1062, 104-112
J. Steiner, B.D. Nguyen, B.D., M. Roder, A.N. Danilewsky, S. Sandfeld, P.J. Wellmann, 2022. Applicability of a Flat-Bed Birefringence Setup for the Determination of Threading Dislocations of Silicon Carbide Wafers. Materials Science Forum 1062, 113-118
J. Hu, H.Song, S. Sandfeld, X. Liu, Y Wei, 2022. Breakdown of Archard law due to transition of wear mechanism from plasticity to fracture. Tribology International 173, 107660
C. Zhang, H. Song, D. Oliveros, A. Fraczkiewicz, M. Legros, S. Sandfeld, 2022. Data-Mining of In-Situ TEM Experiments: On the Dynamics of Dislocations in CoCrFeMnNi Alloys. Acta Materialia 241, 118394 (2022),
P.H. Serrao, S. Sandfeld, A. Prakash, 2022. OptiMic: A tool to generate optimized polycrystalline microstructures for materials simulations, SoftwareX, 15
P. Trampert, D. Rubinstein, F. Boughorbel, C. Schlinkmann, M. Luschkova, P. Slusallek, T. Dahmen, S. Sandfeld, 2021. Deep neural networks for analysis of microscopy images—synthetic data generation and adaptive sampling, Crystals 11(258), 1-13
H. Song, N. Gunkelmann, G. Po, S. Sandfeld, 2021. Data-mining of dislocation microstructures: Concepts for coarse-graining of internal energies, Modelling and Simulation in Materials Science and Engineering, 29(3)
T. Pflug, C. Wuestefeld, M. Motylenko, S. Sandfeld, D. Rafaja, A. Horn, 2020. Hydrodynamic modeling and time-resovled imaging refectometry of the ultrafast laser-induced ablation of a thin gold film, Optics and Lasers in Engineering (accepted for publication), 129, 106067
B. D. Nguyen, A. M. Rausch, J. Steiner, P. Wellmann, S. Sandfeld, 2020. On the importance of dislocation flow incontinuum plasticity models for semiconductor materials, J. Crystal Growth, 532
V. Samaee, S. Sandfeld, H. Idrissi, J. Groten, T. Pardoen, R. Schwaiger, D. Schryvers, 2020. Dislocation microstructure and the role of grain boundaries in cyclically deformed Ni micropillars , Materials Science and Engineering: A(769), 138295
H. Song, J. Hu, S. Sandfeld, X. Liu, Z. Liu, Z. Zhuang, 2019. Predicting the yield stress and dominant yielding mechanisms: analytical models based on discrete dislocation plasticity, Scientific Reports, 9 (20422)
S. Sandfeld, V. Samaee, H. Idrissi, J. Groten, T. Pardoen, R. Schwaiger, D. Schryvers, 2019. Datasets for the analysis of dislocations at grain boundaries and during vein formation in cyclically deformed Ni micropillars , Data in Brief, 27, 104724
D. Steinberger, H. Song, S. Sandfeld, 2019. Machine learning and Data Mining applied to Discrete Dislocation Dy-namics Simulations, (Invited submission to the reasearch topic “Machine Learning and Data Mining in Materials Science” in frontiers), 6, 1–10
J. Steiner, M. Roder, B.D. Nguyen, S. Sandfeld, A. Danilewsky, P. Wellmann, 2019. Analysis of the Basal Plane Dislocation Density and Thermomechanical Stress during 100 mm PVT Growth of 4H-SiC, Materials, 12(13), 1–8
X. Lui, S., Zhang, H. Song, S. Sandfeld, Y. Wei, 2019. An Elastic Contact Model of Rough Surfaces Accounting for Three-dimensional Sinusoidal Asperities and Asperity Interaction, Journal of Tribology, 141(12), 121401–121411
A. Prakash and S. Sandfeld, 2018. Chances and Challenges in fusing data science with materials science, Practical Metallography, 55(8), 493–514
P. Felfer and S. Sandfeld, 2018. Digitalisation in Materials Science - Combination Experiments and Simulation Across Length Scales, Practical Metallography, 55(8), 492
I. Issa, M. Alfreider, D. Darjan, O. Kolednik, S. Sandfeld, D. Kiener, 2018. Linking Macroscopic Fracture Properties to Single Dislocation Processes, Microscopy and Microanalysis, 24, 2184–2185
R. Kositski, D. Steinberger, S. Sandfeld, D. Mordehai, 2018. Shear relaxation behind the shock front in h110i molybdenum - From the atomic scale to continuous dislocation fields, Journal of Computational Materials Science, 149, 125–133
S. Liebenstein, S. Sandfeld, M. Zaiser, 2018. Size and disorder effects in elasticity of cellular structures: From discrete models to contiunuum representations, International Journal of Solids and Structures, 146, 97–116
Z. Budrikis, D. Castellanos, S. Sandfeld, M. Zaiser, S. Zapperi, 2017. Universality of Avalanche Exponents in Plastic Deformation of Disordered Solids, Nature Communications, 8(15928), 1–10
N. Gunkelmann, I. A. Alhafez, D. Steinberger, H. M. Urbassek, S. Sandfeld, 2017. Nanoscratching of iron: A novel approach to characterize dislocation microstructures, Journal of Computational Materials Science, 135, 181–188
R. Wu and S. Sandfeld, 2017. A Dislocation dynamics assisted phase-field model for creep in Nickel-based superalloys: the role of initial dislocation density and external stress, Journal of Alloys and Compounds, 703, 389–395
R. Wu, M. Zaiser, S. Sandfeld, 2017. A continuum approach to combined γ/γ 0 evolution and dislocation plasticity in Nickel-based superalloys, International Journal of Plasticity, 95, 142–162
T. Barraclough, J. R. Blackford, S. Liebenstein, S. Sandfeld, T. J. Stratford, G. Weinländer, M. Zaiser, 2017. Propagating compaction bands in confined compression of snow, Nature Physics, 13, 272–275
R. Wu and S. Sandfeld, 2016. Insights from a minimal model of dislocation-assisted rafting in single crystal Nickel-based superalloys, Scripta Materialia, 123, 42–45
D. Steinberger, Riccardo Gatti and S. Sandfeld, 2016. Computational characterization and analysis of dislocation microstructure, Journal of the Minerals, Metals & Materials Society, 68, 1–8
M. Monavari, S. Sandfeld, M. Zaiser, 2016. Continuum Representation of Systems of Dislocation Lines: A General Method for Deriving Closed-Form Evolution Equations, Journal of the Mechanics and Physics of Solids, 95, 575–601
S. Sandfeld and G. Po, 2015. Comparison of the kinematics of discrete and continuum dislocation models, Modelling and Simulation in Materials Science and Engineering, 23(8)
S. Sandfeld and M. Zaiser, 2015. Pattern formation in a minimal model of continuum dislocation plasticity, Modelling and Simulation in Materials Science and Engineering, 23(6)
S. Sandfeld, E. Thawinan, C. Wieners, 2015. A link between microstructure evolution and macroscopic response in elasto-plasticity: formulation and numerical approximation of the higher-dimensional Continuum Dislocation Dynamics theory, International Journal of Plasticity, 72
S. Sandfeld, V. Verbeke, B. Devincre, 2015. Orientation-dependent Pattern Formation in a 1.5D Continuum Model of Curved Dislocations, Materials Research Society Symposium Proceedings, 1755
A. Taloni, A. Benassi, S. Sandfeld, S. Zapperi, 2015. Scalar model for frictional precursors dynamics, Scientific Reports, 5
S. Sandfeld, Z. Budrikis, S. Zapperi, D. Fernandez-Castellanos, 2015. Avalanches, loading and finite size effects in 2D amorphous plasticity: results from a finite element model, Journal of Statistical Mechanics: Theory and Experiment, P02011
S. Sandfeld and M. Zaiser, 2014. Deformation Patterns and Surface Morphology in a Minimal Model of Amorphous Plasticity, Journal of Statistical Mechanics: Theory and Experiment, P03014
M. Zaiser and S. Sandfeld, 2014. Scaling properties of dislocation simulations in the similitude regime, Modelling and Simulation in Materials Science and Engineering, 22
T. Hochrainer, S. Sandfeld, M. Zaiser, P. Gumbsch, 2014. Continuum dislocation dynamics: Towards a physical theory of crystal plasticity, Journal of the Mechanics and Physics of Solids, 63
K. Schulz, D. Dickel, S. Schmitt, S. Sandfeld, D. Weygand, P. Gumbsch, 2014. Analysis of dislocation pile-ups using a dislocation-based continuum theory, Modelling and Simulation in Materials Science and Engineering, 22
M. Monavari, M. Zaiser, S. Sandfeld, 2014. Comparison of closure approximations for continuous dislocation dynamics, Materials Research Society Symposium Proceedings, 1651
S. Sandfeld, M. Monavari, M. Zaiser, 2013. From systems of discrete dislocations to a continuous field description: stresses and averaging aspects, Modelling and Simulation in Materials Science and Engineering, 21
S. Sandfeld, T. Hochrainer, M. Zaiser, P. Gumbsch, 2011. Continuum modeling of dislocation plasticity: Theory, numerical implementation and validation by discrete dislocation simulations, Journal of Materials Research, 26, Invited Feature Paper
S. Sandfeld, M. Zaiser, T. Hochrainer, 2010. Application of a 3D-Continuum Theory of Dislocations to Problems of Constrained Plastic Flow: Microbending of Thin Film, Materials Research Society Symposium Proceedings, 1224
S. Sandfeld, T. Hochrainer, M. Zaiser, P. Gumbsch, 2010. Numerical Implementation of a 3D Continuum Theory of Dislocation Dynamics and Application to Microbending, Philosophical Magazine, 90(27-28), 3697–3728

List of book chapter and other publications

Köhler, S., Rheinbach, O., Sandfeld., S. Micromechanics Simulations Coupling the deal.II Software Library With a Parallel FETI-DP Solver. In: Brenner, S.C., Chung, E., Klawonn, A., Kwok, F., Xu, J., Zou, J. (eds) Domain Decomposition Methods in Science and Engineering XXVI. Lecture Notes in Computational Science and Engineering, vol 145. Springer, Cham. (2023)
B. D. Nguyen and S. Sandfeld, 2022. Novel Theoretical Approaches for Understanding and Predicting Dislocation Evolution and Propagation, in: Wide Bandgap Semiconductors for Power Electronics (ed. by P. Wellmann et al.), Wiley-VCH
R. Strobl, M. Budnitzki, S. Sandfeld, 2020. Properties of Phase Microstructures and Their Interaction with Dislocations in the Context of TRIP Steel Systems. In: Biermann, H., Aneziris, C. (eds) Austenitic TRIP/TWIP Steels and Steel-Zirconia Composites
S. Köhler, O. Rheinbach, S. Sandfeld, D. Steinberger, 2019. FETI-DP Solvers and Deal.II for Problems in Dislocation Mechanics, PAMM, 1(19), p. e201900292
A.Heinlein, O. Rheinbach, F.Röver, S. Sandfeld, D. Steinberger, 2019. Applying the FROSch Overlapping Schwarz Preconditioner to Dislocation Mechanics in Deal.II, PAMM, 1(19), p. e201900337
Steinberger and S. Sandfeld, 2016. D2C – converting and compressing discrete dislocation microstructure data, TMS 2015 Proceedings
R. Wu and S. Sandfeld, 2016. Some steps towards modelling of dislocation assisted rafting: a coupled 2D phase field – continuum dislocation dynamics approach, TMS 2015 Proceedings
S. Liebenstein, S. Sandfeld, M. Zaiser, 2014. Higher Order Continuum Modelling for Predicting the Mechanical Behaviour of Solid Foams, Proceedings in Applied Mathematics and Mechanics, 14, p. 315-316
S. Sandfeld, 2013. Modelling of materials with random microstructure: a minimal model of amorphous plasticity, Conference Proceeding of “Snow and Bone 2013 (Telford-UKIERI)”
M. Monavari, S. Schmitt, S. Sandfeld, 2013. A crystal plasticity framework based on the Continuum Dislocation Dynamics theory: relaxation of an idealized micropillar, Proceedings in Applied Mathematics and Mechanics, 13, p. 263-264
E. Thawinan, C. Wieners and S. Sandfeld, 2013. The Higher Dimensional Continuum Dislocation Dynamics Theory: A Runge-Kutta Discontinuous Galerkin Approach, Proceedings in Applied Mathematics and Mechanics, 13, p. 257-258
S. Sandfeld, T. Hochrainer, 2011. Towards Frank-Read Sources in the Continuum Dislocation Dynamics Theory, AIP Conference Proceedings, 1389, p. 1531-1534
P. Gumbsch, S. Sandfeld, J.Senger, D. Weygand,T. Hochrainer, 2011. Continuum modeling of dislocation plasticity: Theory, numerical implementation and comparison to discrete dislocation simulations, Proceedings of the 3rd International Conference on Heterogeneous Material Mechanics (ICHMM-2011), Shanghai, China, DEStech Publications
K. Schulz, S. Sandfeld, P. Gumbsch, 2011. A Three-dimensional Continuum Theory of Dislocation Plasticity – Modelling and Application to a Composite, Proceedings in Applied Mathematics and Mechanics, 11
S. Sandfeld 2010, The evolution of dislocation density in a higher-order continuum theory, PhD thesis, The University of Edinburgh, published in: Shaker Verlag, The Evolution of Dislocation Density in a Higher-order Continuum Theory of Dislocation Plasticity, Schriftenreihe “Werkstoffwissenschaft und Werkstofftechnik”, Band 64 (2010)
S. Sandfeld, M. Zaiser, T. Hochrainer, 2009. Expansion of Quasi-Discrete Dislocation Loops in the Context of a 3D Continuum Theory of Curved Dislocations, AIP Conference Proceedings, 1168(1), p. 1148-1151

Letzte Änderung: 15.04.2024