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Costantino DJ, Scheidemantel TJ, Stone MB, et al. Starting to move through a granular medium. Phys Rev Lett. 2008;101(10):108001doi: 10.1103/PhysRevLett.101.108001.
Costantino, D. J., Scheidemantel, T. J., Stone, M. B., Conger, C., Klein, K., Lohr, M., Modig, Z., & Schiffer, P. (2008). Starting to move through a granular medium. Physical review letters, 101(10), 108001. https://doi.org/10.1103/PhysRevLett.101.108001
Costantino, D J, et al. "Starting to move through a granular medium." Physical review letters vol. 101,10 (2008): 108001. doi: https://doi.org/10.1103/PhysRevLett.101.108001
Costantino DJ, Scheidemantel TJ, Stone MB, Conger C, Klein K, Lohr M, Modig Z, Schiffer P. Starting to move through a granular medium. Phys Rev Lett. 2008 Sep 05;101(10):108001. doi: 10.1103/PhysRevLett.101.108001. Epub 2008 Sep 03. PMID: 18851259.
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Phys Rev Lett. 2008 Sep 05;101(10):108001. doi: 10.1103/PhysRevLett.101.108001. Epub 2008 Sep 03.

Starting to move through a granular medium.

Physical review letters

D J Costantino, T J Scheidemantel, M B Stone, C Conger, K Klein, M Lohr, Z Modig, P Schiffer

Affiliations

  1. Department of Physics and Materials Research Institute, Pennsylvania State University, University Park, Pennsylvania 16802, USA.

PMID: 18851259 DOI: 10.1103/PhysRevLett.101.108001

Abstract

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.

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