Cohesive-frictional and rough powders are the subject of this study. The behavior under isotropic compression is examined for different material properties involving Coulomb friction, rolling-resistance and contact-adhesion. Under isotropic compression, the density continuously increases according to Bauers exponential law, see Ref. (Bauer 1999). However, at a certain pressure/density, the behavior qualitatively changes and the system enters a second branch – again acoording to Bauers law, but with different parameters. In conclusion, the material behavior changes between two states that are both, separately, described by a simple exponential function. The phenomenology and origin of the transition between the two states is discussed.
|Conference||7th European Conference on Numerical Methods in Geotechnical Engineering, NUMGE 2010|
|Period||2/06/10 → 4/06/10|
|Other||June 2-4, 2010|