Ratcheting of Granular Materials
Abstract
We investigate the quasistatic mechanical response of soils under cyclic loading using a discrete model of randomly generated convex polygons. This response exhibits a sequence of regimes, each one characterized by a linear accumulation of plastic deformation with the number of cycles. At the grain level, a quasiperiodic ratchetlike behavior is observed at the contacts, which excludes the existence of an elastic regime. The study of this slow dynamics allows exploration of the role of friction in the permanent deformation of unbound granular materials subjected to cyclic loading.
- Publication:
-
Physical Review Letters
- Pub Date:
- February 2004
- DOI:
- 10.1103/PhysRevLett.92.054301
- arXiv:
- arXiv:cond-mat/0305043
- Bibcode:
- 2004PhRvL..92e4301A
- Keywords:
-
- 45.70.Cc;
- 61.43.Bn;
- 83.10.Gr;
- 83.80.Nb;
- Static sandpiles;
- granular compaction;
- Structural modeling: serial-addition models computer simulation;
- Constitutive relations;
- Geological materials: Earth magma ice rocks etc.;
- Condensed Matter
- E-Print:
- Changed content Submitted to Physical Review Letters