M.Sc. Steve Wolff-Vorbeck

Department for Applied Mathematics
Albert-Ludwigs-University Freiburg
Hermann-Herder-Str. 10, Room 223
79104 Freiburg im Breisgau

Tel: 0761 / 203 5651
E-Mail: steve.wolff-vorbeck at mathematik.uni-freiburg.de
Office hours: on appointment

Research

• Reliability Analysis in Structural Mechanics

• Numerical Methods for Polymorphic Uncertainty Quantification

• Geometric Data Analysis

• Shape Optimization Problems in Structural Mechanics

• Gradientflow Methods and its Applications

• Modeling and Analysis of Phase Field Models

• Numerical Simulation of Phase Field Models

Publications

[1]	Steve Wolff-Vorbeck. Optimization and uncertainty quantification for geometric structures, Thesis, Universität Freiburg, 2023. [DOI ]
[2]	Dondl, Patrick Dondl, Yongming Luo, Stefan Neukamm, and Steve Wolff-Vorbeck. Efficient uncertainty quantification for mechanical properties of randomly perturbed elastic rods, 2023, Preprint. [ bib | arXiv ]
[3]	Patrick Dondl, Alberto Maione, and Steve Wolff-Vorbeck. Multi-material model and shape optimization for bending and torsion of inextensible rods, 2022, Preprint. [ bib | arXiv ]
[4]	Steve Wolff-Vorbeck, Olga Speck, Max Langer, Thomas Speck, and Patrick W. Dondl. Charting the twist-to-bend ratio of plant axes. Journal of the Royal Society Interface, 19(20220131), 2022. [ bib | DOI ]
[5]	Steve Wolff-Vorbeck, Olga Speck, Thomas Speck, and Patrick W. Dondl. Influence of structural reinforcements on the twist-to-bend ratio of plant axes: a case study on carex pendula. Scientific Reports, 11(1):21232, 2021. [ bib | DOI ]
[6]	P Dondl, M Novaga, S Wojtowytsch, and S Wolff-Vorbeck. Connected coulomb columns: analysis and numerics. Nonlinearity, 34(9):6120--6139, 2021. [ bib | DOI | arXiv | http ]
[7]	Steve Wolff-Vorbeck, Max Langer, Olga Speck, Thomas Speck, and Patrick Dondl. Twist-to-bend ratio: an important selective factor for many rod-shaped biological structures. Scientific Reports, 9(1):17182, 2019. [ bib | DOI ]

Teaching

Sommersemester 2023

• Vorlesung, Numerik II

Wintersemester 2021/22

• Seminar, Das Tröpfchenmodell von Gamow, Prof. Dr. Patrick Dondl

Wintersemester 2020/21

• Seminar, Nichtlineare Elastizitätstheorie, Prof. Dr. Patrick Dondl

Wintersemester 2019/20

• Praktische Übung, Einführung in Theorie und Numerik Partieller Differentialgleichungen, Prof. Dr. Michael Růžička

Sommersemester 2019

• Praktische Übung, Mathematische Modellierung, Prof. Dr. Dietmar Kröner

• Praktische Übung, Numerik für Differentialgleichungen, Prof. Dr. Dietmar Kröner

• Einführung in die Programmierung für Studierende der Naturwissenschaften , M.Sc. Christian Palus

Selected Talks and Presentations

• Talk, Shape optimization for bending and torsion of non-homogeneous rods, SFB-Seminar (SFB 1060), Bonn, Germany, 03/2023.

• Talk, Efficient uncertainty quantification for mechanical properties of randomly perturbed elastic rods, Minisymposium: Polymorphic Uncertainty Modelling for the Numerical Design of Structures - 93rd Annual Meeting Gesellschaft für Angewandte Mathematik und Mechanik (GAMM), Aachen, Germany, 08/2022.

• Talk, Homogenization and dimension reduction of elastic rods with randomly perturbed geometry, Minisymposium: Numerical Analysis and Design wit Polymorphic Uncertainties - WCCM-APCOM, Yokohama, Japan, 08/2022 (online).

• Talk, Shape optimization in bending and torsion of inextensible elastic rods: an approch to modeling plant stem morphology, Workshop on Nonlinear Bending, Freiburg, Germany, 05/2022.

• Talk, Connected Coulomb Columns: analysis and numerics, Workshop on Mathematical Methods for Complex Phenomena, Regensburg, Germany, 03/2021.

• Talk, The ratio of torsional to flexural rigidity - An application of phase field models to the morphology of plant stem cross-sections, Euromat Conference, Graz, Austria, 09/2021 (online).

• Presentation, The ratio of torsional to flexural rigidity and the morphology of plant stem cross-sections, Minisymposia: Phase-Field Models in Simulation and Optimization - Part 3: 9th International Congress on Industrial and Applied Mathematics - ICIAM 2019, Valencia, Spain, 07/2019.

• Talk, The ratio of torsional to flexural rigidity and the morphology of plant stem cross-sections, Workshop on Analysis, Simulation and Modeling of Elastic Curves, Freiburg, Germany, 05/2019.

Code

• Shape and Topology Optimization

  Liquid drop model with connected perimeter

Multi-material shape and topology optimization for bending and torsion of inextensible elastic rods

• Geometrical Data Analysis

  Contour detection and curve fitting via Gielis' superformula

• Uncertainty Quantification

  1D-Surrogate model for mechanical tests on randomly perturbed elastic rods

3D-Model for mechanical tests on randomly perturbed elastic rods

• Thesis

  Code devloped within my dissertation

Others

Research Assistant of Project 25, Efficient Uncertainty Modeling for Additively Manufactured Polymer Scaffolds in Bone Tissue Engineering, DFG Priority Programme SPP 1886, Principal Investigator Prof. Dr. P. Dondl