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CALSCALE:GREGORIAN
X-WR-CALNAME:Prof. Reza Moini - Experimental and Computational Fracture Mec
 hanics of Layered and Statistically Architected Materials
X-WR-TIMEZONE:Eastern Time (US & Canada)
BEGIN:VEVENT
DTSTAMP:20261009T200406Z
UID:tag:localist.com\,2008:EventInstance_50604037030809
DTSTART:20250910T200000Z
DTEND:20250910T210000Z
DESCRIPTION:Please join us on Wednesday\, September 10\, 2025 for the Pierc
 e Seminar at 4 PM in Room 1-131 with Prof. Reza Moini.\n\n \n\nAbstract Ti
 tle: Experimental and Computational Fracture Mechanics of Layered and Stat
 istically Architected Materials\n\n \n\nAbstract: \n\nIn the face of the w
 orld’s growing population\, there is a need to develop stronger\, toughe
 r\, and more resilient civil infrastructure materials. Two primary challen
 ges are in enhancing the fracture resistance of brittle construction mater
 ials that have limited toughening mechanisms and advancing the digital fab
 rication processes that enable realization of these mechanisms at scale. \
 nEnhancing the fracture resistance of human-made brittle and quasi-brittle
  such as cement-based materials is challenging due to the limited microstr
 uctural toughening mechanisms. This seminar aims to elucidate several appr
 oaches for engineering toughening mechanisms in brittle cement-based mater
 ials inspired by tough natural systems (i.e.\, nacre\, bone\, sea sponge).
  The examination of fracture properties\, behavior\, and underlying toughe
 ning mechanisms is carried out based on linear and non-linear elastic frac
 ture mechanics using experimental (resistance curves) and computational (c
 oupled phase field-cohesive zone model) approaches. In particular\, engine
 ering toughening mechanisms in hard-hard and hard-soft architected arrange
 ment containing interfaces\, such as those found in the brick-and-mortar a
 rrangement of mollusk shells (e.g.\, tablet sliding\, crack bridging) and 
 in the tubular arrangements of human cortical bone (e.g.\, crack deflectio
 n) are elaborated experimentally and numerically. It was found that additi
 onal toughening mechanisms can be engineered into the cement-based composi
 tes and significantly enhance fracture toughness and ductility by up to an
  order of magnitude compared to constituent monolithic counterparts in har
 d-soft composites. To better understand crack propagation in hard-soft arc
 hitected composites the unified large-deformation constitutive framework w
 as developed (implemented via user-element subroutine within the finite el
 ement software Abaqus) and validated against interfacial LEFM theory. Inte
 rfacial properties play a crucial role in the fracture process. The propos
 ed computational framework couples the phase-field approach for bulk fract
 ure with a potential-based cohesive zone model (CZM) to study crack propag
 ation in multi-material (e.g.\, hard-soft\, hard-hard) containing an inter
 face. The phase-field captures crack initiation and propagation in the bul
 k hard brittle or soft hyperplastic constituents\, and CZM (PPR) captures 
 the role of the interface failure (e.g.\, delamination\, deflection). A st
 atistical mechanics approach for understanding disorder is proposed for th
 e design of purposeful arrangement of architecture. Disorder curves based 
 on translational order parameter (T) and orientational order parameter (Q)
 \, as well as radial distribution function\, g2(r)\, are proposed to quant
 itatively characterize the degree of disorder in architected arrangement o
 f materials in lieu of periodic/non-periodic classification and misperceiv
 ed disorder parameters (perturbation and Voronoi tessellation methods).\n\
 n \n\nBio:\n\nDr. Reza Moini joined the Civil and Environmental Engineerin
 g Department at Princeton University as an assistant professor in January 
 2021. Dr. Moini earned his Ph.D. from the Lyles School of Civil Engineerin
 g at Purdue University in 2020. He is an associated faculty member of the 
 Princeton Materials Institute (PMI)\, Princeton Center for Computational S
 cience & Engineering (PICSciE)\, and Princeton Robotics Center.\n\nHis wor
 k is motivated by the intellectual challenges in understanding the fractur
 e and statistical mechanics of architected and disordered materials. His g
 roup uses experiment\, simulation\, and theory to engineer the mechanics o
 f materials\, by developing numerical frameworks that help probe hypothese
 s in layered materials and by advancing autonomous robotic fabrication pro
 cesses that assist in realization of complex materials. He is the recipien
 t of several awards\, most recently\, Walter P. Moore Jr.\, Faculty Achiev
 ement Award from American Concrete Institute in 2025\, Howard B. Wentz Jr.
  Junior Faculty Award in 2024 from the School of Engineering and Applied S
 cience at Princeton University\, and National Science Foundation (NSF) ear
 ly CAREER award in 2023.
GEO:42.358023;-71.092409
LOCATION:Building 1\, Room 1-131
SUMMARY:Prof. Reza Moini - Experimental and Computational Fracture Mechanic
 s of Layered and Statistically Architected Materials
URL;VALUE=URI:https://calendar.mit.edu/event/prof-reza-moini-princeton-univ
 ersity-pierce
CATEGORIES:Conferences/Seminars/Lectures
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