<div dir="ltr"><div class="gmail_quote"><div dir="ltr"><div>Dear enthusiasts of the SLAAM seminar series,</div><div><br></div><div>This is a gentle reminder that our next SLAAM seminar will be given by <b>Dr. Carmen Lee</b> (<span>North Carolina State University</span>) on <b>Monday, March 18th</b>, at <b>9am Pacific/11am Central/12 noon Eastern time (US)</b>, with the title:<br><br><span id="m_-2499934034406684072m_-1453292425673323796docs-internal-guid-64b8540a-7fff-119e-1565-06b2edea9d86"><span><b>Relating the microscale to the macroscale in granular materials</b></span></span></div><div><br>Please join at the link below to attend:<br><br>
<p style="margin:0px;text-indent:0px;white-space:pre-wrap"><a href="https://umich.zoom.us/j/93341812326?pwd=TVk1ZFl3WGtSWHJmMTM3dG9BVk1jQT09" target="_blank">https://umich.zoom.us/j/93341812326?pwd=TVk1ZFl3WGtSWHJmMTM3dG9BVk1jQT09</a></p>
<p style="margin:0px;text-indent:0px;white-space:pre-wrap"><br></p>
<p style="margin:0px;text-indent:0px;white-space:pre-wrap">Meeting ID: 933 4181 2326</p>
<p style="margin:0px;text-indent:0px;white-space:pre-wrap">Passcode: 289182</p><br>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.<br><br><br>Please see more info in the flyer <a href="https://physics.ucmerced.edu/sites/physics.ucmerced.edu/files/page/documents/carmen_lee_slaam.pdf" target="_blank">here</a> and in the text below:<br><br></div><div><div><span id="m_-2499934034406684072m_-1453292425673323796docs-internal-guid-64b8540a-7fff-119e-1565-06b2edea9d86"><span>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. I</span></span>n
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.</div><div><br></div><div><br></div><div>Speaker Bio:</div><div><span>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. </span><br> <br><br>See you there! <br><br><br>Best regards,<br><br>Suraj Shankar<br><br>on behalf of the SLAAM organizing team<br>(Alexandra Tayar, Suraj Shankar, Daniel Beller, Kinjal Dasbiswas)<br><br>To join the SLAAM mailing list, please sign up <a href="https://docs.google.com/forms/d/e/1FAIpQLScTyzEuuE7TfrrapgP4tzN_oPSqbBhURUxa9-zc8USnY1IPzA/viewform" target="_blank">here</a>. If you’re a postdoc interested in giving a SLAAM talk, we invite you to register your interest on that webform.</div></div><div><br><span class="gmail_signature_prefix">-- </span><br><div dir="ltr" class="gmail_signature" data-smartmail="gmail_signature"><div dir="ltr"><div>*********************************************************************<br></div><div><br></div><div>Regards,</div>Suraj Shankar (he/him/his)<br><div dir="ltr">Assistant Professor of Physics<br></div><div dir="ltr">University of Michigan</div><div>2241 Homer A. Neal Lab<span>oratory,</span></div><div><span>LSA Physics, Ann Arbor, </span>MI 48109</div><div><a href="https://surajshankar.com/" target="_blank">https://surajshankar.com/</a></div><div><span style="color:rgb(153,153,153)"><br></span></div><div><span style="color:rgb(102,102,102)">If I send emails outside of standard
working hours, I may be working flexibly or in a different time zone. I
do not expect a response outside of your working hours.<br></span></div><div><span style="color:rgb(102,102,102)"><br></span></div><div>*********************************************************************</div></div></div></div></div></div></div>