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  • Sep
    28

    SPREE Seminar: Nikolaos Bouklas

    McCormick - Civil and Environmental Engineering

    11:00 AM A230, Technological Institute

    EVENT DETAILS

    Topic: Exploring the low-data regime in hyperelasticity and elastoplasticity

    Abstract: Machine learning techniques are gearing up to play a significant role in the field of computational solid mechanics and multiphysics, enabling the integration of experimental data and physical constraints towards data-driven constitutive laws, acceleration of computational techniques for multi-scale modeling, and new paradigms for the solution of forward and inverse problems, to name a few. This talk will cover recent advancements in the area of ML-enabled constitutive modeling I) A physics-informed data-driven constitutive modeling approach for isotropic and anisotropic hyperelastic materials is developed using tensor representation theorems. The trained surrogates (using laGPR and NNs) are able to respect physical principles such as material frame indifference, material symmetry, and the local balance of angular momentum. Overall, the presented approach is tested on synthetic data from isotropic and anisotropic constitutive laws and shows surprising accuracy even far beyond the limits of the training domain, indicating that the resulting surrogates can efficiently generalize as they incorporate knowledge about the underlying physics. Additionally, it is shown that the inherent material symmetries can be discovered directly from data. II) Finally, we proceed to tackle elastoplasticity in a modular framework. Employing convexity for the yield functions we recover texture-parametrized yield functions using input convex (IC)NNs and propose a hybrid model-data-driven framework to recover yield functions with tension compression asymmetries in the low data regime. Additionally, by employing thermodynamic requirements in an NN-based framework we learn hardening laws from limited experimental data.

    Biography: Dr. Bouklas is an Assistant Professor at the Sibley School of Mechanical and Aerospace Engineering at Cornell University. Prior to that, he was a postdoctoral researcher at the Laboratory for Multiscale Materials Modeling at EPFL, Switzerland, and at the Oden Institute at the University of Texas at Austin. He received his Ph.D. from the Aerospace Engineering and Engineering Mechanics department at the University of Texas at Austin and obtained his Diploma in Mechanical Engineering from the Aristotle University of Thessaloniki, Greece. Dr. Bouklas' research focuses on the fields of theoretical and computational solid mechanics. Developing theoretical frameworks and advanced computational methods, he aims to improve the fundamental understanding of materials and structures and enhance the predictive capabilities in relevant engineering applications. He is interested in the study of soft materials, active materials, and biomaterials, fracture and instabilities, as well as multiscale modeling in coupled multi-physical systems. He is the recipient of the Young Investigator Program award from the Air Force Office of Scientific Research

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    TIME Wednesday, September 28, 2022 at 11:00 AM - 12:00 PM

    LOCATION A230, Technological Institute    map it

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    CONTACT Joy Trehan    joy.trehan@northwestern.edu EMAIL

    CALENDAR McCormick - Civil and Environmental Engineering

  • Oct
    6

    The Jan D. Achenbach Lecture Presented by the Civil and Environmental Engineering and Mechanical Engineering Departments: Robert O Ritchie

    McCormick - Civil and Environmental Engineering

    10:00 AM ITW, Ford Motor Company Engineering Design Center

    EVENT DETAILS

    TIME Thursday, October 6, 2022 at 10:00 AM - 11:00 AM

    LOCATION ITW, Ford Motor Company Engineering Design Center    map it

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    CONTACT Joy Trehan    joy.trehan@northwestern.edu EMAIL

    CALENDAR McCormick - Civil and Environmental Engineering

  • Oct
    6

    Northwestern Engineering's Dean's Seminar Series presents: The Grand Nexus: Information, Materials, Energy

    McCormick School of Engineering and Applied Science

    12:00 PM ITW, 1-350, Ford Motor Company Engineering Design Center

    EVENT DETAILS

    TIME Thursday, October 6, 2022 at 12:00 PM - 1:00 PM

    LOCATION ITW, 1-350, Ford Motor Company Engineering Design Center    map it

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    CONTACT Northwestern Engineering Events    northwestern-engineering-events@northwestern.edu EMAIL

    CALENDAR McCormick School of Engineering and Applied Science

  • Oct
    7

    EES Seminar: Dave Corr

    McCormick - Civil and Environmental Engineering

    2:00 PM A230, Technological Institute

    EVENT DETAILS

    TIME Friday, October 7, 2022 at 2:00 PM - 3:00 PM

    LOCATION A230, Technological Institute    map it

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    CONTACT Tierney Acott    tierney.acott@northwestern.edu EMAIL

    CALENDAR McCormick - Civil and Environmental Engineering

  • Oct
    12

    SPREE/TAM Seminar: Lyesse Laloui

    McCormick - Civil and Environmental Engineering

    3:00 PM L211, Technological Institute

    EVENT DETAILS

    TIME Wednesday, October 12, 2022 at 3:00 PM - 4:00 PM

    LOCATION L211, Technological Institute    map it

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    CONTACT Joy Trehan    joy.trehan@northwestern.edu EMAIL

    CALENDAR McCormick - Civil and Environmental Engineering

  • Oct
    14

    EES Seminar: Se Jong Cho

    McCormick - Civil and Environmental Engineering

    2:00 PM A230, Technological Institute

    EVENT DETAILS

    TIME Friday, October 14, 2022 at 2:00 PM - 3:00 PM

    LOCATION A230, Technological Institute    map it

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    CONTACT Tierney Acott    tierney.acott@northwestern.edu EMAIL

    CALENDAR McCormick - Civil and Environmental Engineering

  • Oct
    19

    SPREE Seminar: Martha Grady

    McCormick - Civil and Environmental Engineering

    11:00 AM A230, Technological Institute

    EVENT DETAILS

    TIME Wednesday, October 19, 2022 at 11:00 AM - 12:00 PM

    LOCATION A230, Technological Institute    map it

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    CONTACT Joy Trehan    joy.trehan@northwestern.edu EMAIL

    CALENDAR McCormick - Civil and Environmental Engineering

  • Oct
    21

    EES Seminar: Dr. Ross Cunning

    McCormick - Civil and Environmental Engineering

    2:00 PM A230, Technological Institute

    EVENT DETAILS

    TIME Friday, October 21, 2022 at 2:00 PM - 3:00 PM

    LOCATION A230, Technological Institute    map it

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    CONTACT Joy Trehan    joy.trehan@northwestern.edu EMAIL

    CALENDAR McCormick - Civil and Environmental Engineering

  • Oct
    26

    SPREE Seminar: Ramathasan Thevamaran

    McCormick - Civil and Environmental Engineering

    11:00 AM A230, Technological Institute

    EVENT DETAILS

    TIME Wednesday, October 26, 2022 at 11:00 AM - 12:00 PM

    LOCATION A230, Technological Institute    map it

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    CONTACT Joy Trehan    joy.trehan@northwestern.edu EMAIL

    CALENDAR McCormick - Civil and Environmental Engineering

  • Oct
    28

    EES Seminar: Amy Willis

    McCormick - Civil and Environmental Engineering

    2:00 PM A230, Technological Institute

    EVENT DETAILS

    TIME Friday, October 28, 2022 at 2:00 PM - 3:00 PM

    LOCATION A230, Technological Institute    map it

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    CONTACT Tierney Acott    tierney.acott@northwestern.edu EMAIL

    CALENDAR McCormick - Civil and Environmental Engineering

  • Oct
    31

    NORTHWESTERN SUSTAINABILITY LECTURE SERIES

    McCormick - Civil and Environmental Engineering

    8:30 AM Louis Room, Norris University Center

    EVENT DETAILS

    TIME Monday, October 31, 2022 at 8:30 AM - 4:30 PM

    LOCATION Louis Room, Norris University Center    map it

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    CONTACT Tierney Acott    tierney.acott@northwestern.edu EMAIL

    CALENDAR McCormick - Civil and Environmental Engineering

  • Nov
    2

    SPREE Seminar: Sanat Kumar

    McCormick - Civil and Environmental Engineering

    11:00 AM A230, Technological Institute

    EVENT DETAILS

    TIME Wednesday, November 2, 2022 at 11:00 AM - 12:00 PM

    LOCATION A230, Technological Institute    map it

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    CONTACT Joy Trehan    joy.trehan@northwestern.edu EMAIL

    CALENDAR McCormick - Civil and Environmental Engineering

  • Nov
    4

    EES Seminar: Mari Winkler

    McCormick - Civil and Environmental Engineering

    2:00 PM A230, Technological Institute

    EVENT DETAILS

    TIME Friday, November 4, 2022 at 2:00 PM - 3:00 PM

    LOCATION A230, Technological Institute    map it

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    CONTACT Joy Trehan    joy.trehan@northwestern.edu EMAIL

    CALENDAR McCormick - Civil and Environmental Engineering

  • Nov
    9

    SPREE Seminar: Jialiang Le

    McCormick - Civil and Environmental Engineering

    11:00 AM A230, Technological Institute

    EVENT DETAILS

    TIME Wednesday, November 9, 2022 at 11:00 AM - 12:00 PM

    LOCATION A230, Technological Institute    map it

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    CONTACT Tierney Acott    tierney.acott@northwestern.edu EMAIL

    CALENDAR McCormick - Civil and Environmental Engineering

  • Nov
    11

    EES Seminar: Cindy Priadi

    McCormick - Civil and Environmental Engineering

    2:00 PM A230, Technological Institute

    EVENT DETAILS

    TIME Friday, November 11, 2022 at 2:00 PM - 3:00 PM

    LOCATION A230, Technological Institute    map it

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    CONTACT Tierney Acott    tierney.acott@northwestern.edu EMAIL

    CALENDAR McCormick - Civil and Environmental Engineering

  • Nov
    18

    EES Seminar: Ashish Sharma

    McCormick - Civil and Environmental Engineering

    2:00 PM A230, Technological Institute

    EVENT DETAILS

    TIME Friday, November 18, 2022 at 2:00 PM - 3:00 PM

    LOCATION A230, Technological Institute    map it

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    CONTACT Tierney Acott    tierney.acott@northwestern.edu EMAIL

    CALENDAR McCormick - Civil and Environmental Engineering

  • Nov
    23

    Thanksgiving vacation begins 6 p.m.

    University Academic Calendar

    All Day

    EVENT DETAILS

    TIME Wednesday, November 23, 2022

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    CONTACT Office of the Registrar    nu-registrar@northwestern.edu EMAIL

    CALENDAR University Academic Calendar

  • Nov
    28

    Thanksgiving Break ends and Fall classes resume

    University Academic Calendar

    All Day

    EVENT DETAILS

    TIME Monday, November 28, 2022

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    CONTACT Office of the Registrar    nu-registrar@northwestern.edu EMAIL

    CALENDAR University Academic Calendar