Bulletin of the American Physical Society
APS March Meeting 2024
Monday–Friday, March 4–8, 2024; Minneapolis & Virtual
Session N00: Poster Session II (11:30am-2:30pm CST)
11:30 AM,
Wednesday, March 6, 2024
Room: Hall BC
Sponsoring
Unit:
APS/SPS
Abstract: N00.00147 : How do fixed pins affect elasticity and rheology of jammed, sheared particles?*
Presenter:
Xiang Li
(Swarthmore College)
Authors:
Xiang Li
(Swarthmore College)
Jean Luc Ishimwe
(Swarthmore College)
Abir K.M.S. Mahmud
(Bucknell University)
Amin Danesh
(Bucknell University)
Michael J Bolish
(Bucknell University)
Cacey S Bester
(Swarthmore College)
Brian Utter
(University of California, Merced)
Katharina Vollmayr-Lee
(Bucknell University)
Amy L Graves
(Swarthmore College)
We now investigate elasticity and plasticity via molecular dynamics simulations, with rough walls to establish constant pressure and shear rate. Macroscopically: The presence of pins decreases the linear elasticity and increases the plasticity. Mesoscopically: Compressive oscillations are damped and transverse velocity is attenuated as per a simple model with Hookian springs [2]. Long-lasting fluctuations from affinity are suppressed by pins, and new circulation patterns are established around them. A vertical pressure gradient is established for the highest pin densities studied. Microscopically: Non-affine deformations of clusters of particles, quantified using D2min, are more pronounced around pins. The total number of locations of high D2min increase with pin density, and the behavior of D2min is correlated with the local shear.
[1] P. Wentworth-Nice et al., Soft Matter 16, 5305 (2020); A.L. Zhang et al, Phys. Rev. E 106, 034902 (2022).
[2] B. Tighe, personal communication (2022).
*We acknowledge the financial support from the National Science Foundation DMR-1905474 and DMR-1905737 and XSEDE/ACCESS allocations DMR-190064/PHY230003 and TRA100004.
Follow Us |
Engage
Become an APS Member |
My APS
Renew Membership |
Information for |
About APSThe American Physical Society (APS) is a non-profit membership organization working to advance the knowledge of physics. |
© 2024 American Physical Society
| All rights reserved | Terms of Use
| Contact Us
Headquarters
1 Physics Ellipse, College Park, MD 20740-3844
(301) 209-3200
Editorial Office
100 Motor Pkwy, Suite 110, Hauppauge, NY 11788
(631) 591-4000
Office of Public Affairs
529 14th St NW, Suite 1050, Washington, D.C. 20045-2001
(202) 662-8700