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  • Apr
    14

    SPREE Seminar: Ryan Hurley

    McCormick - Civil and Environmental Engineering

    11:00 AM

    EVENT DETAILS

    Experimental Micromechanics of 3D Granular Materials with Applications to Force Chains, Waves, Rearrangements, Length Scales

    Abstract

    Granular materials are the sands, soils, and powders that are ubiquitous in nature and technology. Traditional approaches to studying granular materials include discrete and continuum modeling, 2D experiments using model materials, and 3D experiments using X-ray computed tomography (XRCT). While modeling approaches provide crucial predictions of material behavior across length scales, their quantitative validation in terms of both kinematics and stresses remains a challenge. Furthermore, while experimental techniques such as XRCT provide in-situ data on particle kinematics, they do not provide stress fields needed to fully constrain constitutive laws and link microscopic energy dissipation mechanisms to macroscopic deformation.

    In this talk, I will first discuss our experimental approach to studying the micromechanics of 3D granular materials that combines in-situ XRCT and 3D X-ray diffraction (3DXRD), an X-ray scattering technique that provides per-particle stress tensors in thousands of crystalline particles simultaneously. I will then discuss exciting applications of our experiments, including for studying: inter-particle force networks in granular materials, ultrasound wave behavior, the microscopic origins of macroscopic energy dissipation, the role of packing structure and particle stress in local rearrangements, and the length scales governing representative volume element sizes of various material properties.

    Bio

    Dr. Ryan Hurley is an Assistant Professor in the Department of Mechanical Engineering and a Fellow of the Hopkins Extreme Materials Institute at the Johns Hopkins University (JHU). He received his B.S. in Civil Engineering from the University of Maryland, College Park (2011) and his M.S. and Ph.D. in Applied Mechanics from the California Institute of Technology (2012 and 2015). From 2015 – 2017, Ryan was a postdoctoral researcher in the Computational Geosciences Group at Lawrence Livermore National Laboratory in Livermore, California and an Assistant Research Professor at JHU. He joined JHU full-time as an Assistant Professor in January 2018. He received the Department of Energy’s Secretary’s Appreciation Award in 2017 for his work on the Source Physics Experiment and a 2020 NSF CAREER award. Ryan’s interests include studying the deformation and failure mechanisms of granular materials, rocks, concrete, and ceramics using advanced experimental techniques and modeling approaches.

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    TIME Wednesday, April 14, 2021 at 11:00 AM - 12:00 PM

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    CONTACT Tierney Acott    tierney.acott@northwestern.edu EMAIL

    CALENDAR McCormick - Civil and Environmental Engineering

  • May
    13

    TAM Seminar: Dr. Nathalie Vriend

    McCormick - Civil and Environmental Engineering

    10:00 AM

    EVENT DETAILSmore info

    TIME Thursday, May 13, 2021 at 10:00 AM - 11:00 AM

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    CONTACT Alison Rodriguez    alison.rodriguez@northwestern.edu EMAIL

    CALENDAR McCormick - Civil and Environmental Engineering

  • May
    14

    Social Equity & Racial Justice Seminar: Lee Bey

    McCormick - Civil and Environmental Engineering

    2:00 PM

    EVENT DETAILS

    TIME Friday, May 14, 2021 at 2:00 PM - 3:00 PM

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    CONTACT Tierney Acott    tierney.acott@northwestern.edu EMAIL

    CALENDAR McCormick - Civil and Environmental Engineering

  • May
    19

    Osterberg Lecture: Edward Kavazanjian, Jr.

    McCormick - Civil and Environmental Engineering

    11:00 AM

    EVENT DETAILS

    TIME Wednesday, May 19, 2021 at 11:00 AM - 12:30 PM

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    CONTACT Alison Rodriguez    alison.rodriguez@northwestern.edu EMAIL

    CALENDAR McCormick - Civil and Environmental Engineering

  • May
    20

    Julio M. Ottino: Prediction, Understanding, and the Unreasonable Effectiveness of Mathematics: A View Through the Window of Mixing

    McCormick-Engineering Sciences and Applied Mathematics

    12:00 PM

    EVENT DETAILS

    TIME Thursday, May 20, 2021 at 12:00 PM - 1:00 PM

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    CONTACT Madeline Kennedy    madeline.kennedy@northwestern.edu EMAIL

    CALENDAR McCormick-Engineering Sciences and Applied Mathematics

  • May
    21

    EES Seminar: Edward Kolodziej

    McCormick - Civil and Environmental Engineering

    2:00 PM

    EVENT DETAILS

    TIME Friday, May 21, 2021 at 2:00 PM - 3:00 PM

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    CONTACT Tierney Acott    tierney.acott@northwestern.edu EMAIL

    CALENDAR McCormick - Civil and Environmental Engineering

  • May
    28

    EES Seminar: Nadine Borduas-Dedekind

    McCormick - Civil and Environmental Engineering

    2:00 PM

    EVENT DETAILS

    TIME Friday, May 28, 2021 at 2:00 PM - 3:00 PM

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    CONTACT Tierney Acott    tierney.acott@northwestern.edu EMAIL

    CALENDAR McCormick - Civil and Environmental Engineering

  • May
    31

    Memorial Day (no classes)

    University Academic Calendar

    All Day

    EVENT DETAILS

    TIME Monday, May 31, 2021

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

    CALENDAR University Academic Calendar

  • Jun
    5

    Spring classes end

    University Academic Calendar

    All Day

    EVENT DETAILS

    TIME Saturday, June 5, 2021

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

    CALENDAR University Academic Calendar

  • Jun
    7

    Spring examinations begin

    University Academic Calendar

    All Day

    EVENT DETAILS

    TIME Monday, June 7, 2021

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

    CALENDAR University Academic Calendar

  • Jun
    12

    Spring examinations end

    University Academic Calendar

    All Day

    EVENT DETAILS

    TIME Saturday, June 12, 2021

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

    CALENDAR University Academic Calendar

  • Jun
    13

    McCormick School of Engineering Convocation (Tentative)

    McCormick School of Engineering and Applied Science

    1:00 PM Ryan Field

    EVENT DETAILSmore info

    TIME Sunday, June 13, 2021 at 1:00 PM - 3:00 PM

    LOCATION Ryan Field    map it

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

    CALENDAR McCormick School of Engineering and Applied Science

  • Jun
    14

    Commencement (Tentative)

    University Academic Calendar

    All Day

    EVENT DETAILS

    TIME Monday, June 14, 2021

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

    CALENDAR University Academic Calendar

  • Jun
    18

    Spring Degrees Conferred

    University Academic Calendar

    All Day

    EVENT DETAILS

    TIME Friday, June 18, 2021

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

    CALENDAR University Academic Calendar