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SUMMARY:ENAC Seminar Series by Dr. Konstantinos Karapiperis
DTSTART:20230517T093000
DTEND:20230517T103000
DTSTAMP:20260428T021516Z
UID:c5dd91740939a62d8d345a7c0669021384e99cc1ffb426e29a4670ff
CATEGORIES:Conferences - Seminars
DESCRIPTION: Dr. Konstantinos Karapiperis \n09:30-10:30 - Dr. Konstanti
 nos Karapiperis\nPostdoctoral Scholar\, ETH Zürich \n\nBridging physics-
 based and data-driven modeling of granular materials\n\nOur ability to pre
 dict the mechanical response of granular materials is key to designing geo
 technical systems and mitigating geophysical hazards. It relies on underst
 anding their mechanics across scales\, from the interparticle frictional c
 ontact\, and the mesoscale formation of force chains\, to the continuum di
 ssipative behavior. In the first part of the talk\, I discuss how we can l
 everage physics-based models\, furnished by a high-fidelity discrete eleme
 nt method\, to shed light on the mechanics of geomaterials. Examples to be
  drawn include the development of digital twins for experiments\, which ar
 e used to probe continuum properties such as fabric evolution\, cyclic loa
 ding-induced instability and macroscopic stick-slip friction\, and to reve
 al unconventional properties of “engineered” granular materials. In th
 e second part of the talk\, I focus on integrating these physics-based mod
 els with data-driven methods. In particular\, I address the problem of sca
 le bridging through a thermodynamics-informed data-driven approach\, cover
 ing applications ranging from shear banding to grain fracture encountered 
 in high-confining pressures. Finally\, I tackle an inverse problem\, where
  machine learning is utilized to encode the relationship between mechanica
 l properties and granular shape\, in view of optimizing the latter. I conc
 lude with an outlook on the potential of hybrid physics-based and data-dri
 ven methods for tackling challenging coupled problems in geomechanics.\n\n
 Short bio: \n\nDr. Konstantinos (Kostas) Karapiperis is a postdoctoral sc
 holar and lecturer at ETH Zürich. He received his Diploma in Civil Engine
 ering from NTUA\, Greece\, his M.Sc. also in Civil Engineering from Univer
 sity of California\, Davis (U.S.A)\, and his PhD in Applied Mechanics from
  the California Institute of Technology (Caltech\, U.S.A)\, where he also 
 earned a Minor in Applied and Computational Mathematics. Awarded with a Ma
 rie Skłodowska-Curie Postdoctoral Fellowship in April 2021\, Dr. Karapipe
 ris joined the Mechanics and Materials Laboratory at ETH Zürich. His rese
 arch interests include the multiscale mechanics of materials\, particularl
 y granular and geomaterials\, which he studies from a hybrid physics-based
  and data-driven perspective.
LOCATION:GC B1 10 https://plan.epfl.ch/?room==GC%20B1%2010
STATUS:CONFIRMED
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