TY - JOUR
T1 - Starting to move through a granular medium
AU - Costantino, D. J.
AU - Scheidemantel, T. J.
AU - Stone, M. B.
AU - Conger, C.
AU - Klein, K.
AU - Lohr, M.
AU - Modig, Z.
AU - Schiffer, P.
PY - 2008/9/3
Y1 - 2008/9/3
N2 - We explore the process of initiating motion through a granular medium by measuring the force required to push a flat circular plate upward from underneath the medium. In contrast with previous measurements of the drag and penetration forces, which were conducted during steady state motion, the initiation force has a robust dependence on the diameter of the grains in the medium. We attribute this dependence to the requirement for local dilation of the grains around the circumference of the plate, as evidenced by an observed linear dependence of the initiation force on the plate diameter.
AB - We explore the process of initiating motion through a granular medium by measuring the force required to push a flat circular plate upward from underneath the medium. In contrast with previous measurements of the drag and penetration forces, which were conducted during steady state motion, the initiation force has a robust dependence on the diameter of the grains in the medium. We attribute this dependence to the requirement for local dilation of the grains around the circumference of the plate, as evidenced by an observed linear dependence of the initiation force on the plate diameter.
UR - http://www.scopus.com/inward/record.url?scp=51149093283&partnerID=8YFLogxK
U2 - 10.1103/PhysRevLett.101.108001
DO - 10.1103/PhysRevLett.101.108001
M3 - Article
AN - SCOPUS:51149093283
SN - 0031-9007
VL - 101
JO - Physical Review Letters
JF - Physical Review Letters
IS - 10
M1 - 108001
ER -