Bonded-cell model for particle fracture

Physical Review. E, Statistical, Nonlinear, and Soft Matter Physics
Duc-Hanh NguyenF Radjai

Abstract

Particle degradation and fracture play an important role in natural granular flows and in many applications of granular materials. We analyze the fracture properties of two-dimensional disklike particles modeled as aggregates of rigid cells bonded along their sides by a cohesive Mohr-Coulomb law and simulated by the contact dynamics method. We show that the compressive strength scales with tensile strength between cells but depends also on the friction coefficient and a parameter describing cell shape distribution. The statistical scatter of compressive strength is well described by the Weibull distribution function with a shape parameter varying from 6 to 10 depending on cell shape distribution. We show that this distribution may be understood in terms of percolating critical intercellular contacts. We propose a random-walk model of critical contacts that leads to particle size dependence of the compressive strength in good agreement with our simulation data.

References

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Oct 4, 2012·Physical Review. E, Statistical, Nonlinear, and Soft Matter Physics·Juan Carlos QuezadaFarhang Radjai
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Aug 15, 2014·Physical Review. E, Statistical, Nonlinear, and Soft Matter Physics·Duc-Hanh NguyenPhilippe Sornay

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Citations

Apr 13, 2018·The European Physical Journal. E, Soft Matter·Duc-Hanh NguyenFarhang Radjaï
Sep 28, 2017·Physical Review Letters·Hadrien LaubieFranz-Josef Ulm
Feb 20, 2019·Physical Review. E·Pavel S IlievHans J Herrmann
Jun 25, 2020·Physical Review. E·Luisa Fernanda OrozcoFarhang Radjai

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