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Events

Jan
30
TAM Seminar- Continuum Damage Modeling of Dynamic Fracture and Crack-Branching: Model Adequacy, Mesh Objectivity and Localization Limiters- Kedar Kirane
McCormick - Civil and Environmental Engineering (CEE)
11:00 AM B211, Technological Institute
EVENT DETAILS
Abstract: Computational modeling of dynamic fracture is crucial for ensuring structural safety and optimizing material performance under rapid loading conditions, such as impacts and explosions, in applications ranging from aerospace and automotive to defense and geophysics. It underpins designs for tougher materials with improved energy absorption, as well as understanding microstructural effects on crack propagation. This talk will focus on an in-depth assessment and understanding of continuum damage modeling of dynamic fracture with an emphasis on model accuracy and regularization with respect to mesh size. We will first discuss dynamic fracture predictions with a local, isotropic continuum damage model based on a frame invariant effective strain. We demonstrate that overall, various experimentally observed aspects of dynamic cracks are reproduced by this simple model, including acceleration of cracks to a steady state velocity, increased micro-branching and macro-branching with increased strain rates, crack velocity dependence of energy dissipation and fracture surface area, and the behavior of dynamic cracks at material interfaces. However, phenomena such as fragmentation cannot be explicitly predicted. Comparisons with phase-field models further underscore the effectiveness of this approach. Next, we will discuss model regularization with respect to mesh size. Since dynamic fracture is typically characterized by extensive crack branching, it usually implies the suppression of damage localization. Yet, continuum damage models must be employed along with localization limiters such as the crack band model (CBM) and rate dependent damage (RDD). A detailed analysis into model regularization reveals that CBM ensures mesh-independent energy dissipation at lower loading rates, where localized or minimally branched cracks dominate, but becomes ineffective at higher rates due to increased branching and diffusion of fractures. Conversely, RDD introduces an internal length scale that regularizes the solution at higher rates but struggles at lower ones. Combining CBM and RDD does not universally resolve mesh dependency issues, particularly at low rates, highlighting the absence of a single “go-to” strategy for achieving mesh objectivity across all conditions. These findings offer critical insights for researchers and engineers working to refine finite element modeling for dynamic fracture applications, as well as outline directions for future work.
Bio: Prof. Kedar Kirane is an associate professor of Mechanical Engineering at Stony Brook University, New York. His research focuses on characterizing, understanding, and predicting the fracturing and scaling behavior of various conventional and advanced heterogeneous materials. These include brittle materials, fiber reinforced composites, polymers, nanocomposites, geological and cementitious materials, and soft materials. His research combines experimental, computational, and theoretical approaches. The overarching goal is to develop reliable predictive capabilities and sound scientific bases for safe designs in various engineering applications. Prof. Kirane obtained his Ph.D. in 2014 from Northwestern University and joined the Mechanical Engineering faculty at Stony Brook University in Sept 2017. He also holds an M.S. degree from the Ohio State University (2007) and a B.S from the University of Pune, India (2004), both in mechanical engineering. Prior to joining Stony Brook, Prof. Kirane worked in industry, as a finite element analyst at Goodyear Tire & Rubber Co and later as a senior research engineer at ExxonMobil Corp. His research is supported by DOD ARO, DOD ONR, NSF NRT, and ASME. He is the recipient of the 2020 Orr Early Career Award by ASME’s Materials Division, the 2019 DOD ARO Young Investigator Award, and the 2018 Haythornthwaite Research Initiation Grant by ASME’s Applied Mechanics Division.
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TIME Thursday, January 30, 2025 at 11:00 AM - 12:00 PM
LOCATION B211, Technological Institute    map it
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CONTACT Andrew Liguori    andrew.liguori@northwestern.edu EMAIL
CALENDAR McCormick - Civil and Environmental Engineering (CEE)
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
Enjoy a welcome from Dean Christopher A. Schuh and other McCormick leaders, and receive a Northwestern Engineering T-shirt. A free light breakfast on the Tech East Plaza will follow.
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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
TBA
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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
New Undergraduate Fall 2025 Registration
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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
TBA
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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
Enjoy a welcome from Dean Christopher A. Schuh and other McCormick leaders, and receive a Northwestern Engineering T-shirt. A free lunch on the Tech East Plaza will follow.
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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
Fall Classes Begin. Change of Registration (Drop/Add) Late registration for returning students begins
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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
TBA
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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
TBA
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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
TBA
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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
TBA
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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
TBA
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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
TBA
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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
TBA
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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
TBA
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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
Civil and Environmental Engineering Career Fair.
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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
TBA
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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
TBA
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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
Abstract: Carbon dioxide (CO2) is the most important greenhouse gas, and carbon monoxide (CO) is acutely toxic. Release of these gases must be halted. One promising approach is microbiological valorization of CO2 and CO in off-gas streams. Valorization means converting the CO2 or CO to valuable organic compounds that are feedstock for the chemical and energy industries. This talk describes two distinctly different examples of valorization. The first example is valorizing the CO2 in digester biogas using photosynthetic microalgae. The benefits are to generate more methane (CH4) while converting the biogas (~65% CH4) to higher-value biomethane (>97% CH4). The second example is conversion of syngas (a mixture of CO, CO2, and hydrogen (H2)) to organic acids and alcohols using CO-fermenting and chain-elongating bacteria.
Bio: Dr. Bruce E. Rittmann is Regents Professor of Environmental Engineering and Director of the Biodesign Swette Center for Environmental Biotechnology at Arizona State University. His research focuses on the science and engineering needed to “manage microbial communities to provide services to society.” Services include generating renewable energy, cleaning water and soil, and improving human health. Dr. Rittmann is a member of the National Academy of Engineering; a Fellow of AAAS, WEF, IWA, AEESP, and NAI; and a Distinguished Member of ASCE. Dr. Rittmann was awarded the first Clarke Prize for Outstanding Achievements in Water Science and Technology from the NWRI, the Walter Huber Research Prize and the Simon Freese Award from ASCE, the G.M. Fair Award from AAEES, the Perry L. McCarty/AEESP Founders Award, and the Camp Applied Research Award from WEF. He is the co-winner of the 2018 Stockholm Water Prize. Dr. Rittmann has published over 880 journal articles, books, and book chapters, and he has 25 patents. With Dr. Perry McCarty, Dr. Rittmann co-authored the textbook Environmental Biotechnology: Principles and Applications (McGraw-Hill Book Co.), which is now out in its second edition.
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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
TBA
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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
TBA
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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
TBA
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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
TBA
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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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