CEE 200 Sec 1 Seminar - Mo Li - Nov. 6
https://www.cee.ucla.edu/events/cee-200-sec-1-seminar-mo-li/
UCLA Civil & Environmental
Engineering Department
C&EE 200 Section 1
Seminar
Structural,
Geotechnical and Civil Engineering Materials
Mo Li, Ph.D.
Assistant Professor, University of California, Irvine
Today’s needs to improve concrete
infrastructure service life and resilience are challenged by the limitations
with concrete materials that are intrinsically quasi-brittle, and the absence
of spatial damage sensing methods to inform timely maintenance and prevent
structural failure. Concrete is susceptible to cracking and deterioration under
service conditions and damage under extreme hazard events. Current management
practices of concrete infrastructure rely on regular visual inspections that
can be subjective and are limited to accessible locations. Structural health
monitoring approaches mainly depend on point-based sensors that provide local
measurements and cannot identify spatial damage such as cracking and corrosion.
To tackle these challenges, this work focuses on a new direct, spatial sensing
approach based on novel multifunctional cementitious materials. Multifunctional
cementitious materials are encoded with a distributed microcracking damage
process coupled with damage self-sensing capacity. The sequential formation of
steady-state microcracks during material strain-hardening stage leads to a
prolonged damage process and high damage tolerance, while allowing detection of
damage level long before failure occurs. The unique electromechanical behavior
of the material enables strain and damage self-sensing functionalities during
elastic and post-cracking stages. Through advancements in tomography methods,
spatial mapping offering a visual depiction and quantification of damage in
concrete members is achieved by electrical probing only from the boundaries.
This talk highlights the research on these developments at the interface of
science and engineering.
Where: Geology Building 4660
When: 1:00 – 1:50 PM on Tuesday, November 6, 2018
Dr. Mo Li is an Assistant Professor of Civil
and Environmental Engineering, and Assistant Professor of Chemical Engineering
and Materials Science at the University of California, Irvine. She received her
M.S. in Civil Engineering, M.S. in Industrial and Operations Engineering, and
Ph.D. in Civil Engineering from the University of Michigan, Ann Arbor. She did
her undergraduate studies at Tongji University in China. Her research focuses on
nonconventional infrastructure materials, and their interfaces with structural
engineering, health monitoring, and advanced manufacturing methods. Examples
are intrinsic and repeatable self-healing cementitious materials, bio-inspired
self-sensing and visualization of spatial damage in concrete structures,
damage-tolerant geopolymers, and 3D printing concrete for highly loaded
structures. She is the recipient of the Samueli Faculty Career Development
Professorship, the Innovation in Teaching Award, and is the Director of the
Infrastructure Materials Research and Advanced Manufacturing Laboratory at UCI.
She has served as a principle investigator for a number of federal-, state- and
industry-funded projects.
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