Presentation by Dr. Konstantinos Karapiperis (Post-doctoral Researcher and Lecturer at ΕΤΗZurich, Switzerland) on 26/10/2023 at 12:30.

 In the context of seminars/research presentations that take place in the Department of Mechanical Engineering, on October 26th, 2023, at 12:30 in the seminar room of the Department of Mechanical Engineering, there is a scheduled research presentation/lecture by Dr. Konstantinos Karapiperis (Post-doctoral Researcher and Lecturer at ETH Zurich, Switzerland) with the following title:

Bridging physics-based and data-driven modeling in granular mechanics

Our ability to predict the mechanical response of granular materials is key to designing engineering systems and mitigating geophysical hazards (e.g. earthquakes, landslides). It relies on understanding their mechanics across scales, from the interparticle frictional contact, and the mesoscale formation of force chains, to the continuum dissipative behavior. In the first part of the talk, I discuss how we can leverage physics-based models, furnished by a digital twin-based discrete element method, to shed light on continuum properties of granular materials such as fabric evolution, cyclic loading-induced instability and stick-slip friction. In the second part of the talk, I focus on the multiscale analysis of boundary value problems, by integrating physics and thermodynamics principles with data-driven techniques. Additional applications will be covered in this part which range from shear banding to grain fracture induced by high-confining pressures.

The duration will be 40 minutes.

Konstantinos Karapiperis is currently a Post-doctoral Researcher and Lecturer at ΕΤΗ Zurich, Switzerland, where he is part of the Mechanics and Materials Group in the Department of Mechanical and Process Engineering. From 2021 to 2023, he was supported by a Marie-Sklodowska Curie Individual Post-doctoral Fellowship. He received his PhD in Applied Mechanics from the California Institute of Technology, United States, where he also obtained a Minor in Applied and Computational Mathematics. He also holds an MSc in Geomechanics from the University of California, Davis, United States. In 2012 he obtained his Diploma in Civil Engineering from the National Technical University of Athens (NTUA).