Ratcheting of granular materials

Details Ratcheting of granular materials Ratcheting of granular materials

2003-05-02

arxiv.org/abs/cond-mat/0305043v2

Phys. Rev. Lett. 92, 054301 (2004)

Physics

Condensed Matter

Changed content Submitted to Physical Review Letters

Scientific paper

10.1103/PhysRevLett.92.054301

We investigate the quasi-static 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 quasi-periodic ratchet-like behavior is observed at the contacts, which excludes the existence of an elastic regime. The study of this slow dynamics allows to explore the role of friction in the permanent deformation of unbound granular materials supporting railroads and streets.

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