Caltech Logo

Mechanical and Civil Engineering Seminar

Thursday, November 4, 2021
11:00am to 12:00pm
Add to Cal
Gates-Thomas 135
Data-driven mechanics – the challenge to model inelastic material behaviour and structures
Stefanie Reese, Professor, Institute of Applied Mechanics, RWTH Aachen University,

Mechanical and Civil Engineering Seminar Series
Abstract:

Data‐driven mechanics offers a new framework for the solution of boundary value problems in solid mechanics. This framework shows the appealing property that data from experiments might be included in computations directly, by eventually circumventing the step of material modelling. It can be seen that this works very well for unambiguous stress‐strain relationships. A major challenge, however, is inelastic behavior, in the context of which load and unload paths must be considered. An important question is how the stress‐strain data set can be extended to determine the degree of inelasticity uniquely. Another issue concerns the embedding of a suitable algorithm in a finite element environment. Finally, the efficient search of the available data is a crucial point. Various search algorithms are investigated, based on k‐d trees, k means trees and k‐NN graphs. It turns out that the DD computation yields highly satisfactory results, with respect to both accuracy and computational efficiency.

Bio:

Stefanie Reese is Full Professor at RWTH Aachen University and Director of the Institute of Applied Mechanics (IFAM) in Aachen, Germany, which she established in 2010. After receiving her Dr.‐Ing. degree in 1994 from the Technische Universität Darmstadt and postdoc stays at the University of California at Berkeley (USA) and the University of Capetown (South Africa) she became in the year 2000 Professor at the Ruhr University Bochum. From 2005 until 2009 she was Full Professor (W3) at the Technische Universität Carolo‐Wilhelmina at Braunschweig. She has received several prizes and is member of three academies, among these the National Academy of Science and Engineering. Since 2010, she is Fellow of the International Association for Computational Mechanics (IACM). She is Associate Editor of the open access journal Advanced Modeling and Simulation of Engineering Sciences and holds membership in several editorial boards, e.g. in Computer Methods in Applied Mechanics and Engineering. In 2015, she became Treasurer of the European Mechanics Society (Euromech). Since, 2020, she is speaker of the review panel "Mechanics and Constructive Mechanical Engineering" of the German Science Foundation.

NOTE: At this time, in-person Mechanical and Civil Engineering Lectures are open to all Caltech students/staff/faculty/visitors with a valid Caltech ID. Outside community members are welcome to join our online webinar.

Zoom link:
https://caltech.zoom.us/j/88437643491?pwd=a1dFQnVMMFpmUXV6NWZWbEtTbG14QT09
Passcode: 298741

For more information, please contact Jenni Campbell by email at jenni@caltech.edu or visit https://www.mce.caltech.edu/seminars.