### Abstract

Employing two-dimensional molecular dynamics (MD) simulations of soft particles, we study their non-affine responses to quasi-static isotropic compression where the effects of microscopic friction between the particles in contact and particle size distributions are examined. To quantify complicated restructuring of force-chain networks under isotropic compression, we introduce the conditional probability distributions (CPDs) of particle overlaps such that a master equation for distribution of overlaps in the soft particle packings can be constructed. From our MD simulations, we observe that the CPDs are well described by q-Gaussian distributions, where we find that the correlation for the evolution of particle overlaps is suppressed by microscopic friction, while it significantly increases with the increase of poly-dispersity.

Original language | English |
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Pages (from-to) | 409-417 |

Number of pages | 9 |

Journal | Computational Particle Mechanics |

Volume | 4 |

Issue number | 4 |

DOIs | |

Publication status | Published - 2017 Oct 1 |

### Keywords

- DEM
- Force-chain networks
- Granular materials
- Quasi-static deformations
- Stochastic model

### ASJC Scopus subject areas

- Computational Mechanics
- Civil and Structural Engineering
- Numerical Analysis
- Modelling and Simulation
- Fluid Flow and Transfer Processes
- Computational Mathematics

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## Cite this

*Computational Particle Mechanics*,

*4*(4), 409-417. https://doi.org/10.1007/s40571-016-0138-z