Publications by authors named "Nathan W Mueggenburg"
Behavior 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
We measure the local contact forces at both the top and bottom boundaries of three-dimensional face-centered-cubic and hexagonal-close-packed granular crystals in response to an external force applied to a small area at the top surface. Depending on the crystal structure, we find markedly different results which can be understood in terms of force balance considerations in the specific geometry of the crystal. Small amounts of disorder are found to create additional structure at both the top and bottom surfaces.
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