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DTSTART;TZID=America/New_York:20201027T103000
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SUMMARY:MEAM Seminar: "Data-driven Physics Discovery and Scale Bridging in Materials"
DESCRIPTION:In this talk I will provide an overview of our recent work in data-driven methods—mainly machine learning—to enhance computational materials physics models. This body of work has proceeded along two main fronts. The first is system inference\, where we seek to identify physical mechanisms via their mathematical signatures as differential or algebraic operators. Our approach of Variational System Identification leverages the weak form of partial differential equations to identify the physics underlying pattern formation\, and the deformation mechanisms of soft materials. The framework of Variational System Identification has to address several challenges specific to experimental characterization of materials\, such as data that is noisy\, sparse\, originates from different specimens\, and spans dynamics to steady state regimes. The second front is in scale bridging\, which we approach in the context of determining free energy functions. We have developed Integrable Deep Neural Networks\, and active learning algorithms to combine data generated by Density Functional Theory calculations with cluster expansions and Monte Carlo computations to obtain free energy density functions. These are used in mechano-chemically coupled continuum methods to predict the evolution of microstructure in alloys.
URL:https://seasevents.nmsdev7.com/event/meam-seminar-data-driven-physics-discovery-and-scale-bridging-in-materials/
LOCATION:Zoom – Email MEAM for Link\, peterlit@seas.upenn.edu
CATEGORIES:Seminar
ORGANIZER;CN="Mechanical Engineering and Applied Mechanics":MAILTO:meam@seas.upenn.edu
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