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Academic Seminar (Course) FENS G035 SEMINAR: Design of composite materials and structures across the scales

The ambitious goal of reaching net-zero emissions in aviation by 2050 can only be met by science-based disruptive innovations, including those that have the potential to reduce aircraft structural weight. Based on the hypothesis that composite materials and structures are currently not used to their full potential, a vision of a systems approach for the inverse design of composite materials and structures across different spatial scales will be presented. The main building blocks of the proposed approach, linking the macrostructure of a composite structure to the microstructure of a composite material, will be discussed. At the micromechanical level, these include the generation of representative volume elements, appropriate material models for the constituents, reduced order models and associated surrogates. A recently developed mesomechanical modelling approach that simulates the propagation of the different failure mechanisms observed in composite laminates under finite strains using a new homogenization-based smeared crack formulation will be discussed. At the structural level, building on data generated analytically and on reduced representations of composite lay-ups, machine learning algorithms are used to predict the strength of composite laminates with notches of several geometries and the corresponding statistical distribution, associated to material and geometrical variability. It will be shown that the proposed approach may lead to significant reductions of the time required to virtually certify composite aircraft structures.

25.03.2024 - All Day
Academic Seminar (Course) Online EE SEMINAR: Information Design and Timeliness in Future Communication..

Information plays a pivotal role in most modern learning, control, and communication systems. The rise of modern IoT technologies like self-driving cars, augmented reality, and real-time surveillance systems has highlighted the crucial need for time-sensitive information. Beyond timeliness, in domains like online advertising and learning, where information receivers actively make decisions, the actions of the information receivers can impact both the utility of information providers and receivers. Consequently, information providers must strategically craft information to maximize their own utility. In this seminar, I will talk about how problems related to timeliness and information design arise in communication networks in various system settings. Specifically, I will talk about time-varying binary information dissemination over a network of gossiping agents. Here, I will discuss when gossiping can be helpful (or harmful) as it may cause accurate (or incorrect) information to disseminate further in the network. Next, different from the classical communication settings where the objectives of the information provider(s) and the receivers are aligned, I will discuss more general scenarios where the information providers and receiver have misaligned objectives. Modeling this interaction as a hierarchical strategic communication game between multiple senders and the receiver, I will discuss how the competition among multiple senders (due to their misaligned objectives) is beneficial for the receiver. Lastly, I will briefly talk about the extension of our work to an online setting where the sender does not know the receivers interest and mention our experimental design framework to test spite and probability bias in Bayesian Persuasion.

05.03.2024 - All Day
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