Bonded-cell model for particle fracture
Name
PhysRevE.91.022203.pdf
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766.85 KB
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Author(s)
Nguyen, Duc-Hanh
Azema, Emilien
Sornay, Philippe
Radjai, Farhang
Date Issued
February 2015
Journal
Physical Review E
Publisher
American Physical Society
Citation
Nguyen, Duc-Hanh, Emilien Azéma, Philippe Sornay, and Farhang Radjai. “Bonded-Cell Model for Particle Fracture.” Phys. Rev. E 91, no. 2 (February 2015) © 2015 American Physical Society
Version
Final published version
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.
MIT Department
MIT Energy Initiative
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DOI of Published Version
https://doi.org/10.1103/PhysRevE.91.022203
