Protocol dependence of mechanical properties in granular systems

Shio Inagaki, M. Otsuki, S. Sasa

Research output: Contribution to journalArticle

5 Citations (Scopus)

Abstract

We study the protocol dependence of the mechanical properties of granular media by means of computer simulations. We control a protocol of realizing disk packings in a systematic manner. In 2D, by keeping material properties of the constituents identical, we carry out compaction with various strain rates. The disk packings exhibit the strain rate dependence of the critical packing fraction above which the pressure becomes non-zero. The observed behavior contrasts with the well-studied jamming transitions for frictionless disk packings. We also observe that the elastic moduli of the disk packings depend on the strain rate logarithmically. Our results suggest that there exists a time-dependent state variable to describe macroscopic material properties of disk packings, which depend on its protocol.

Original languageEnglish
Article number124
JournalEuropean Physical Journal E
Volume34
Issue number11
DOIs
Publication statusPublished - Nov 1 2011

Fingerprint

Elastic Modulus
Computer Simulation
mechanical properties
Pressure
Mechanical properties
strain rate
Strain rate
Materials properties
jamming
Jamming
modulus of elasticity
Compaction
computerized simulation
Elastic moduli
Computer simulation

All Science Journal Classification (ASJC) codes

  • Biotechnology
  • Biophysics
  • Chemistry(all)
  • Materials Science(all)
  • Surfaces and Interfaces

Cite this

Protocol dependence of mechanical properties in granular systems. / Inagaki, Shio; Otsuki, M.; Sasa, S.

In: European Physical Journal E, Vol. 34, No. 11, 124, 01.11.2011.

Research output: Contribution to journalArticle

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