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Coupling Continuum Damage Mechanics and Discrete Fracture Models: A Geomechanics Perspective Read chapter Read first chapter

2021 | OriginalPaper | Chapter

Compression Model of Crushable Granular Materials Considering Particle Size Effect

Authors : Tianliang Zheng, Erxiang Song

Published in: Challenges and Innovations in Geomechanics

Publisher: Springer International Publishing

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Abstract

Hydrostatic and one-dimensional compression behavior of granular material are closely related to particle breakage. Tangent constrained modulus may decrease with loading because of the significant crushing of particles. However few compression models could represent this behavior. The traditional semilog linear compression model only shows increasing modulus. In this article, an elasto-plastic compression model is proposed. The plastic strain is divided into plastic hardening strain and plastic breakage strain, the former is due to particle packing, interparticle slip, and rotation, while the latter is due to breakage of asperities and whole-particle fracture. Plastic breakage strain is linked with particle characteristic strength following a power-law particle size effect. The model is verified by experimental results from the literature.

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previous chapter Improved Contact Bond Model of Discrete Element Method for Simulating Strain Rate Effect of Rock Materials
next chapter Numerical Methods for Simulation of Coupled Hydro-Mechanical Processes in Fractured Porous Media
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Metadata
Title
Compression Model of Crushable Granular Materials Considering Particle Size Effect
Authors
Tianliang Zheng
Erxiang Song
Copyright Year
2021
Book
Challenges and Innovations in Geomechanics

Print ISBN: 978-3-030-64513-7

Electronic ISBN: 978-3-030-64514-4

Copyright Year: 2021

DOI
https://doi.org/10.1007/978-3-030-64514-4_59