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  • Apr
    28

    SPREE Seminar: Hoang Nguyen

    McCormick - Civil and Environmental Engineering

    11:00 AM

    EVENT DETAILS

    Effect of Crack-Parallel Compression or Tension on Structural Scaling strength of Materials – as applied to Concrete, Composite and Metal

    ABSTRACT
    In all widely used fracture test specimens, the compressive or tensile stress parallel to the plane of growing crack is negligible, and thus its effect cannot be revealed. The classical fracture models, including the cohesive crack model, cannot capture any effect of such crack-parallel normal stress and strain, except parametrically, because they do not figure as the basic thermodynamic variables. To capture these effect, the fracture process zone must be modeled tensorially, by a strain-softening damage constitutive law. Here it is shown experimentally, and documented by crack band finite element simulations with microplane model M7, that the crack-parallel normal stresses have a major effect in quasibrittle materials such as concrete. They are shown to cause a major decrease or increase of the Mode I (opening) fracture energy Gf (or fracture toughness KIc. The experiments introduce a modification of the standard three-point bend test, whose idea is the use plastic pads with a near-perfect yield plateau to first generate compression, and a gap at end supports to close later and generate bending. The experiments show and the microplane model confirms that a small crack-parallel compression greatly increases Gf (even doubling it or more), but a higher compression reduces Gf greatly, which represents the case of compression splitting. The microplane model predictions fit the test results closely. Thus validated, it shows that crack-parallel tension reduces Gf, and further that a compressive or tensile stress normal to the specimen plate has a similar major effect on Gf. High crack-parallel stresses arise, e.g., in shear failure of reinforced concrete beams or slabs, and they are typical for prestressed concrete, as well as in hydraulic fracturing of shale.

    BIOGRAPHY
    Hoang received his Bachelor's degree in Civil Engineering from Bach Khoa University (old name Ho Chi Minh city University of Technology, Vietnam) in 2014. He then earned his Master's degree in Theoretical and Applied Mechanics (TAM) from Northwestern University (USA) in 2017. Since then, he has been jointly advised by Professor Horacio Espinosa and Prof. Zdeněk Bažant to pursue a Ph. D. degree also in TAM. Hoang is interested in multiphysics and multiscale phenomena in rock-like materials (primarily concrete), and how to apply his understanding of those phenomena into sustaining structural serviceability and improving other human-structure interaction activities. Aside from research, he enjoys reading natural and health science books and jamming mash-up from random songs.

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    TIME Wednesday, April 28, 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

  • Sep
    8

    Welcome & Breakfast for New McCormick PhD Students

    McCormick School of Engineering and Applied Science

    9:00 AM LR2 & Tech East Plaza, Technological Institute

    EVENT DETAILS

    TIME Monday, September 8, 2025 at 9:00 AM - 10:00 AM

    LOCATION LR2 & Tech East Plaza, Technological Institute    map it

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    CONTACT Andi Joppie    andi.joppie@northwestern.edu EMAIL

    CALENDAR McCormick School of Engineering and Applied Science

  • Sep
    10

    CEE Department BBQ

    McCormick - Civil and Environmental Engineering (CEE)

    4:00 PM Dawes House

    EVENT DETAILS

    TIME Wednesday, September 10, 2025 at 4:00 PM - 7:00 PM

    LOCATION Dawes House   

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    CONTACT Andrew Liguori    andrew.liguori@northwestern.edu EMAIL

    CALENDAR McCormick - Civil and Environmental Engineering (CEE)

  • Sep
    12

    New Undergraduate Fall 2025 Registration

    University Academic Calendar

    All Day

    EVENT DETAILS

    TIME Friday, September 12, 2025

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

    CALENDAR University Academic Calendar

  • Sep
    12

    New Graduate Student Orientation

    McCormick - Civil and Environmental Engineering (CEE)

    9:00 AM M345, Technological Institute

    EVENT DETAILS

    TIME Friday, September 12, 2025 at 9:00 AM - 5:00 PM

    LOCATION M345, Technological Institute    map it

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    CONTACT Andrew Liguori    andrew.liguori@northwestern.edu EMAIL

    CALENDAR McCormick - Civil and Environmental Engineering (CEE)

  • Sep
    15

    Welcome & Luncheon for New Full-time Graduate Students

    McCormick School of Engineering and Applied Science

    11:00 AM Ryan Auditorium & Tech East Plaza, Technological Institute

    EVENT DETAILS

    TIME Monday, September 15, 2025 at 11:00 AM - 12:30 PM

    LOCATION Ryan Auditorium & Tech East Plaza, Technological Institute    map it

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    CONTACT Andi Joppie    andi.joppie@northwestern.edu EMAIL

    CALENDAR McCormick School of Engineering and Applied Science

  • Sep
    16

    Fall Classes Begin. Change of Registration (Drop/Add) Late registration for returning students begins

    University Academic Calendar

    All Day

    EVENT DETAILS

    TIME Tuesday, September 16, 2025

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

    CALENDAR University Academic Calendar

  • Sep
    24

    SPREE Seminar

    McCormick - Civil and Environmental Engineering (CEE)

    11:00 AM A230, Technological Institute

    EVENT DETAILS

    TIME Wednesday, September 24, 2025 at 11:00 AM - 12:00 PM

    LOCATION A230, Technological Institute    map it

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    CONTACT Andrew Liguori    andrew.liguori@northwestern.edu EMAIL

    CALENDAR McCormick - Civil and Environmental Engineering (CEE)

  • Sep
    26

    EES Seminar- Levia Straka

    McCormick - Civil and Environmental Engineering (CEE)

    2:00 PM A230, Technological Institute

    EVENT DETAILS

    TIME Friday, September 26, 2025 at 2:00 PM - 3:00 PM

    LOCATION A230, Technological Institute    map it

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    CONTACT Andrew Liguori    andrew.liguori@northwestern.edu EMAIL

    CALENDAR McCormick - Civil and Environmental Engineering (CEE)

  • Sep
    29

    AED-MPM Seminar

    McCormick - Civil and Environmental Engineering (CEE)

    11:00 AM A230, Technological Institute

    EVENT DETAILS

    TIME Monday, September 29, 2025 at 11:00 AM - 12:00 PM

    LOCATION A230, Technological Institute    map it

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    CONTACT Andrew Liguori    andrew.liguori@northwestern.edu EMAIL

    CALENDAR McCormick - Civil and Environmental Engineering (CEE)

  • Oct
    1

    SPREE Seminar

    McCormick - Civil and Environmental Engineering (CEE)

    11:00 AM A230, Technological Institute

    EVENT DETAILS

    TIME Wednesday, October 1, 2025 at 11:00 AM - 12:00 PM

    LOCATION A230, Technological Institute    map it

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    CONTACT Andrew Liguori    andrew.liguori@northwestern.edu EMAIL

    CALENDAR McCormick - Civil and Environmental Engineering (CEE)

  • Oct
    3

    EES Seminar- Hee-Deung Park

    McCormick - Civil and Environmental Engineering (CEE)

    2:00 PM A230, Technological Institute

    EVENT DETAILS

    TIME Friday, October 3, 2025 at 2:00 PM - 3:00 PM

    LOCATION A230, Technological Institute    map it

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    CONTACT Andrew Liguori    andrew.liguori@northwestern.edu EMAIL

    CALENDAR McCormick - Civil and Environmental Engineering (CEE)

  • Oct
    6

    AED-MPM Seminar

    McCormick - Civil and Environmental Engineering (CEE)

    11:00 AM A230, Technological Institute

    EVENT DETAILS

    TIME Monday, October 6, 2025 at 11:00 AM - 12:00 PM

    LOCATION A230, Technological Institute    map it

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    CONTACT Andrew Liguori    andrew.liguori@northwestern.edu EMAIL

    CALENDAR McCormick - Civil and Environmental Engineering (CEE)

  • Oct
    8

    SPREE Seminar

    McCormick - Civil and Environmental Engineering (CEE)

    11:00 AM A230, Technological Institute

    EVENT DETAILS

    TIME Wednesday, October 8, 2025 at 11:00 AM - 12:00 PM

    LOCATION A230, Technological Institute    map it

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    CONTACT Andrew Liguori    andrew.liguori@northwestern.edu EMAIL

    CALENDAR McCormick - Civil and Environmental Engineering (CEE)

  • Oct
    10

    EES Seminar- Benjamin Barrios Cerda

    McCormick - Civil and Environmental Engineering (CEE)

    2:00 PM A230, Technological Institute

    EVENT DETAILS

    TIME Friday, October 10, 2025 at 2:00 PM - 3:00 PM

    LOCATION A230, Technological Institute    map it

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    CONTACT Andrew Liguori    andrew.liguori@northwestern.edu EMAIL

    CALENDAR McCormick - Civil and Environmental Engineering (CEE)

  • Oct
    11

    CEE Career Fair

    McCormick - Civil and Environmental Engineering (CEE)

    9:00 AM Louis Room, Norris University Center

    EVENT DETAILS

    TIME Saturday, October 11, 2025 at 9:00 AM - 12:00 PM

    LOCATION Louis Room, Norris University Center    map it

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    CONTACT Andrew Liguori    andrew.liguori@northwestern.edu EMAIL

    CALENDAR McCormick - Civil and Environmental Engineering (CEE)

  • Oct
    13

    AED-MPM Seminar

    McCormick - Civil and Environmental Engineering (CEE)

    11:00 AM A230, Technological Institute

    EVENT DETAILS

    TIME Monday, October 13, 2025 at 11:00 AM - 12:00 PM

    LOCATION A230, Technological Institute    map it

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    CONTACT Andrew Liguori    andrew.liguori@northwestern.edu EMAIL

    CALENDAR McCormick - Civil and Environmental Engineering (CEE)

  • Oct
    15

    SPREE Seminar

    McCormick - Civil and Environmental Engineering (CEE)

    11:00 AM A230, Technological Institute

    EVENT DETAILS

    TIME Wednesday, October 15, 2025 at 11:00 AM - 12:00 PM

    LOCATION A230, Technological Institute    map it

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    CONTACT Andrew Liguori    andrew.liguori@northwestern.edu EMAIL

    CALENDAR McCormick - Civil and Environmental Engineering (CEE)

  • Oct
    17

    Jimmy Quon Lecture: Valorizing Gas Streams Containing CO2 and CO- Bruce Rittman

    McCormick - Civil and Environmental Engineering (CEE)

    2:00 PM A230, Technological Institute

    EVENT DETAILS

    TIME Friday, October 17, 2025 at 2:00 PM - 3:00 PM

    LOCATION A230, Technological Institute    map it

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    CONTACT Andrew Liguori    andrew.liguori@northwestern.edu EMAIL

    CALENDAR McCormick - Civil and Environmental Engineering (CEE)

  • Oct
    20

    AED-MPM Seminar

    McCormick - Civil and Environmental Engineering (CEE)

    11:00 AM A230, Technological Institute

    EVENT DETAILS

    TIME Monday, October 20, 2025 at 11:00 AM - 12:00 PM

    LOCATION A230, Technological Institute    map it

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    CONTACT Andrew Liguori    andrew.liguori@northwestern.edu EMAIL

    CALENDAR McCormick - Civil and Environmental Engineering (CEE)

  • Oct
    22

    SPREE Seminar

    McCormick - Civil and Environmental Engineering (CEE)

    11:00 AM A230, Technological Institute

    EVENT DETAILS

    TIME Wednesday, October 22, 2025 at 11:00 AM - 12:00 PM

    LOCATION A230, Technological Institute    map it

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    CONTACT Andrew Liguori    andrew.liguori@northwestern.edu EMAIL

    CALENDAR McCormick - Civil and Environmental Engineering (CEE)

  • Oct
    24

    EES Seminar- Adductomics: A New Tool in the Exposomics Toolbox- Bill Funk

    McCormick - Civil and Environmental Engineering (CEE)

    2:00 PM A230, Technological Institute

    EVENT DETAILS

    TIME Friday, October 24, 2025 at 2:00 PM - 3:00 PM

    LOCATION A230, Technological Institute    map it

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    CONTACT Andrew Liguori    andrew.liguori@northwestern.edu EMAIL

    CALENDAR McCormick - Civil and Environmental Engineering (CEE)

  • Oct
    27

    AED-MPM Seminar

    McCormick - Civil and Environmental Engineering (CEE)

    11:00 AM A230, Technological Institute

    EVENT DETAILS

    TIME Monday, October 27, 2025 at 11:00 AM - 12:00 PM

    LOCATION A230, Technological Institute    map it

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    CONTACT Andrew Liguori    andrew.liguori@northwestern.edu EMAIL

    CALENDAR McCormick - Civil and Environmental Engineering (CEE)

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