[Slaam] SLAAM Seminar Monday March 18: Carmen Lee (NCSU)

[SLAAM Distribution List]

Dear enthusiasts of the SLAAM seminar series,

We are pleased to announce our next SLAAM seminar will be given by *Dr.
Carmen Lee* (North Carolina State University) on *Monday, March 18th*, at *9am
Pacific/11am Central/12 noon Eastern time (US)*, with the title:

*Relating the microscale to the macroscale in granular materials*

Please join at the link below to attend:

https://umich.zoom.us/j/93341812326?pwd=TVk1ZFl3WGtSWHJmMTM3dG9BVk1jQT09


Meeting ID: 933 4181 2326

Passcode: 289182

As usual, there will be a 15 min informal Q&A at the end of the hour.
Graduate students will have an opportunity to interact with the speaker in
an informal setting during the "Meet the speaker" timeslot just after the
talk. Please join if the time works for you.


Please see more info in the flyer here
<https://physics.ucmerced.edu/sites/physics.ucmerced.edu/files/page/documents/carmen_lee_slaam.pdf>
and in the text below:

Granular materials, like soils and powders, play crucial roles in diverse
applications from construction to agriculture to pharmaceuticals. Unlike
continuous media, where strength can be determined by bulk material
properties, the strength of granular materials is highly dependent on grain
connectivity (fabric), force transmission, and frictional mobilization at
the particle scale. Furthermore, these bulk properties are strongly
dependent on the geometry and history of loading. It is well established
that anisotropy in fabric and force transmission through a granular packing
directly relates to the bulk scale strength of the packing. Although the
relationship between particle-scale anisotropy and macroscale properties
has been verified through simulated conditions, we have observed that it is
valid for a broad variety of loading histories and geometries in
experimental granular packings.
In this talk, I will present experiments conducted on a photoelastic
granular system -- allowing us to measure individual interparticle contact
forces -- subject to compressive and shear loading. By tracking both
particle positions and interparticle contact force vectors, we map the
anisotropy of the fabric and forces to the macroscale stress and strain. We
find excellent agreement between the anisotropic particle-scale measures
and the macroscale responses in experiments, independent of the loading
geometry, showing that with knowledge of the forces and positions of the
particles, one can predict the strength of the packing.


Speaker Bio:
Carmen Lee is an experimental physicist investigating fluid dynamics and
granular physics, with an interest in exploring fundamental principles and
interdisciplinary connections. Her research delves into understanding the
behaviour of fluids and granular materials, drawing parallels between
physical phenomena and natural systems. Carmen is currently a postdoctoral
researcher at North Carolina State University in the Department of Physics.
She completed her Ph.D. in Physics at McMaster University, focusing on the
driven flow of droplets and bubbles.


See you there!


Best regards,

Suraj Shankar

on behalf of the SLAAM organizing team
(Alexandra Tayar, Suraj Shankar, Daniel Beller, Kinjal Dasbiswas)

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-- 
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Regards,
Suraj Shankar (he/him/his)
Assistant Professor of Physics
University of Michigan
2241 Homer A. Neal Laboratory,
LSA Physics, Ann Arbor, MI 48109
https://surajshankar.com/

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