Publications by authors named "Nathan Mueggenburg"
Successive vertical vibrations can cause a granular pack to rearrange and move to more and more dense configurations. The dilation of the pack that occurs during the vibrations is important to these rearrangements and the resulting compaction of the system. This paper presents an experimental study in which a confining force is used to limit the amount of dilation of the pack.
View Article and Find Full Text PDFBehavior of granular materials under cyclic shear.
Phys Rev E Stat Nonlin Soft Matter Phys
March 2005
The design and development of a parallel plate shear cell for the study of large-scale shear flows in granular materials is presented. The parallel plate geometry allows for shear studies without the effects of curvature found in the more common Couette experiments. A system of independently movable slats creates a well with side walls that deform in response to the motions of grains within the pack.
View Article and Find Full Text PDFForce distributions in three-dimensional compressible granular packs.
Phys Rev E Stat Nonlin Soft Matter Phys
October 2002
Article Synopsis
- This study examines how normal contact forces in 3D packings of compressible granular materials behave based on grain deformation.
- As grains deform less, the probability distribution of forces shows a small peak below the mean and an exponential tail for higher forces.
- With increased deformation, the peak at the mean force becomes more prominent, and the exponential tail steepens, indicating stronger correlations between grain deformation and force distribution.
Stress transmission through three-dimensional ordered granular arrays.
Phys Rev E Stat Nonlin Soft Matter Phys
September 2002
Article Synopsis
- The study analyzes local contact forces in granular crystals with face-centered cubic and hexagonal-close-packed structures when an external force is applied to a small area on the top surface.
- Differences in the crystal structures lead to distinct responses, which can be explained by examining how forces balance within their unique geometries.
- The presence of minor disorder in the crystals results in additional structural variations at both the top and bottom boundaries.