112 citations · 669 across the 19 of their papers we have counts for
5 papers · 1 filter
Heterogeneity and patterning in the quasi-static behavior of granular materials
Matthew R. Kuhn
Heterogeneity is classified in five categories---topologic, geometric, kinematic, static, and constitutive---and the first four categories are investigated in a numerical DEM simul…
Contact rolling and deformation in granular media
Matthew R. Kuhn, Katalin Bagi
The paper considers rotations at different scales in granular materials: the rotations of individual particles, the rolling and rigid-rotation of particle pairs, the rotational int…
Micro-mechanics of fabric and failure in granular materials
Matthew R. Kuhn
The paper addresses the underlying source of two forms of induced anisotropy in granular materials: contact orientation anisotropy and contact force anisotropy. A rational, mathema…
Stability, bifurcation, and softening in discrete systems: A conceptual approach for granular materials
Matthew R. Kuhn, Ching S. Chang
Matrix stiffness expressions are derived for the particle movements in an assembly of rigid granules having compliant contacts. The derivations include stiffness terms that arise f…
Are granular materials simple? An experimental study of strain gradient effects and localization
Matthew R. Kuhn
Experiments test the dependence of shearing stress on the first two gradients of shear strain. The tests were conducted by direct numerical simulation using the Discrete Element Me…