Description
We experimentally study the quasi-static deformation of a three-dimensional sphere packings subjected to macroscopic deformation. We perform these experiments on slightly polydisperse and nearly frictionless soft hydrogel spheres in a modified triaxial shear apparatus. We resolve the microscopic force and displacement network in a three-dimensional packing through imaging the entire packing at different loading steps. By resolving particle deformations via custom written image analysis software, we extract all particle contacts and contact forces with a very good accuracy. In addition, we measure boundary stresses during compression and shear. We address the non-linear force response of a disordered packing under compression and shear, force network dynamics, and explore the plastic rearrangements inside cyclically sheared and compressed packings.
Recommended Citation
Bares, J., Berhinger, B., Dijksman, J., & Brodu, N. (2014). Imaging forces in a three-dimensional granular material. In A. Bajaj, P. Zavattieri, M. Koslowski, & T. Siegmund (Eds.). Proceedings of the Society of Engineering Science 51st Annual Technical Meeting, October 1-3, 2014 , West Lafayette: Purdue University Libraries Scholarly Publishing Services, 2014. https://docs.lib.purdue.edu/ses2014/mss/mmpm/4
Imaging forces in a three-dimensional granular material
We experimentally study the quasi-static deformation of a three-dimensional sphere packings subjected to macroscopic deformation. We perform these experiments on slightly polydisperse and nearly frictionless soft hydrogel spheres in a modified triaxial shear apparatus. We resolve the microscopic force and displacement network in a three-dimensional packing through imaging the entire packing at different loading steps. By resolving particle deformations via custom written image analysis software, we extract all particle contacts and contact forces with a very good accuracy. In addition, we measure boundary stresses during compression and shear. We address the non-linear force response of a disordered packing under compression and shear, force network dynamics, and explore the plastic rearrangements inside cyclically sheared and compressed packings.