Mechanics, Department System Dynamics and Friction Physics

Dr.-Ing. Emanuel Willert

Office C8-4
Building M
Room 248
Address Str. des 17. Juni 135
10623 Berlin

Scientific CV

1990born in Berlin
2008 - 2014studies of Engineering Science at TU Berlin
2013 - 2014studies of Mechanical Engineering at Tomsk Polytechnic University, Russia
2015 - 2021research assistant with teaching responsibilities at the Department System Dynamics and Friction Physics, TU Berlin
2019doctorate with honours at the Department System Dynamics and Friction Physics, TU Berlin
since 2021research assistant without teaching responsibilities at the Department System Dynamics and Friction Physics, TU Berlin

Research Interests

Contact-Impact Problems
Method of Dimensionality Reduction (MDR)
Functionally Graded Materials
Fretting

Supervised Courses

Continuum Mechanics
Contact Mechanics and Friction
Theory of Materials
Project: Simulation of Tribological Contacts

Publications

Book publications

Willert, E.: Stoßprobleme in Physik, Technik und Medizin: Grundlagen und Anwendungen. Springer Vieweg, Berlin, ISBN 978-3-662-60296-6 (2020) DOI https://doi.org/10.1007/978-3-662-60296-6

Popov, V.L.; Heß, M.; Willert, E.: Handbook of Contact Mechanics – Exact Solutions of Axisymmetric Contact Problems. Springer Verlag, Berlin, ISBN 978-3-662-58709-6 (2019) DOI https://doi.org/10.1007/978-3-662-58709-6

Contact-Impact Problems

Willert, E.; Popov, V.L.: The oblique impact of a rigid sphere on a power-law graded elastic half-space. Mechanics of Materials 109, 82-87 (2017) DOI https://doi.org/10.1016/j.mechmat.2017.03.019

Willert, E.; Kusche, S.; Popov, V.L.: The influence of viscoelasticity on velocity-dependent restitutions in the oblique impact of spheres. Facta Universitatis, Series Mechanical Engineering 15(2), 269-284 (2017) DOI https://doi.org/10.22190/FUME170420006W

Willert, E.; Lyashenko, I.A.; Popov, V.L.: Influence of the Tabor parameter on the adhesive normal impact of spheres in Maugis–Dugdale approximation. Computational Particle Mechanics 5(3), 313-318 (2018) DOI https://doi.org/10.1007/s40571-017-0170-7

Willert, E.: Ratio of Loss and Storage Moduli Determines Restitution Coefficient in Low-Velocity Viscoelastic Impacts. Frontiers in Mechanical Engineering 6:3 (2020) DOI https://doi.org/10.3389/fmech.2020.00003

Method of Dimensionality Reduction (MDR)

Teidelt, E.; Willert, E.; Filippov, A.E.; Popov, V.L.: Modeling of the dynamic contact in stick-slip microdrives using the method of reduction of dimensionality. Physical Mesomechanics 15(5), 287–292 (2012) DOI https://doi.org/10.1134/S1029959912030071

Popov, V.L.; Willert, E.; Heß, M.: Method of Dimensionality Reduction in Contact Mechanics and Friction: A User’s Handbook. III. Viscoelastic Contacts. Facta Universitatis, Series Mechanical Engineering 16(2), 99–113 (2018) DOI https://doi.org/10.22190/FUME180327013P

Willert, E.; Forsbach, F.; Popov, V.L.: Stress tensor and gradient of hydrostatic pressure in the contact plane of axisymmetric bodies under normal and tangential loading. ZAMM Zeitschrift für Angewandte Mathematik und Mechanik 100(7), e201900223 (2020) DOI https://doi.org/10.1002/zamm.201900223

Willert, E.: FFT-based Implementation of the MDR transformations for homogeneous and power-law graded materials. Facta Universitatis, Series Mechanical Engineering 19(4), 805-816 (2021) DOI https://doi.org/10.22190/FUME210415057W

Functionally Graded Materials

Willert, E.: Dugdale-Maugis Adhesive Normal Contact of Axisymmetric Power-Law Graded Elastic Bodies. Facta Universitatis, Series Mechanical Engineering 16(1), 9-18 (2018) DOI https://doi.org/10.22190/FUME171121003W

Willert, E.; Dmitriev, A.I.; Psakhie, S.G.; Popov, V.L.: Effect of elastic grading on fretting wear. Scientific Reports 9:7791 (2019) DOI https://doi.org/10.1038/s41598-019-44269-1

Fretting

Willert, E.: A Simple Semi-Analytic Contact Mechanical Model for Tangential and Torsional Fretting Wear of Axisymmetric Contacts. Symmetry 13(9), 1582 (2021) DOI https://doi.org/10.3390/sym13091582

Willert, E.: Influence of Wear Profile Geometry on Critical Plane Fatigue Crack Initiation Criteria in Plane and Axisymmetric Elastic Fretting Contacts. Frontiers in Mechanical Engineering 8:904282 (2022) DOI https://doi.org/10.3389/fmech.2022.904282

Willert, E.: Explicit Analytic Solutions for the Subsurface Stress Field in Single Plane Contacts of Elastically Similar Truncated Cylinders or Wedges. Applied Mechanics 3(4), 1337-1351 (2022) DOI https://doi.org/10.3390/applmech3040077