High compression of granular assemblies of brittle hollow tubular particles: investigation through a 3D discrete element model

This paper is devoted to the micro-mechanical origins of the high compressibility of brittle tubular particle assemblies. The material is extremely porous due to the presence of a large hole within the tube-shaped particle. The release of the inner void, protected by a fragile shell, gives the mater...

Full description

Saved in:
Bibliographic Details
Published in:Computational particle mechanics 2022-07, Vol.9 (4), p.825-842
Main Authors: Stasiak, M., Combe, G., Richefeu, V., Armand, G., Zghondi, J.
Format: Article
Language:English
Subjects:
Assemblies
Axial strain
Breakage
Brittleness
Classical and Continuum Physics
Compressibility
Compressive properties
Computational Science and Engineering
Discrete element method
Engineering
Engineering Sciences
Mathematical models
Parametric statistics
Porosity
Porous materials
Theoretical and Applied Mechanics
Three dimensional models
Citations: Items that this one cites
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:This paper is devoted to the micro-mechanical origins of the high compressibility of brittle tubular particle assemblies. The material is extremely porous due to the presence of a large hole within the tube-shaped particle. The release of the inner void, protected by a fragile shell, gives the material a very strong ability to compress. The compressive response is investigated by means of the discrete element method, DEM, using crushable elements. To address the complexity of the model, a step-by-step breakdown is developed. The paper comprises the comparison of the numerical results with both results obtained by the authors and existing experiments. With the insights provided by the DEM, we have sought to better understand the phenomena that originate at the grain scale and that govern macroscopic behaviour. Grain breakage was proven to control the compressive behaviour, and thus, the importance of internal pores dominates the inter-particle voids. Then, a novel concept of compressibility analysis has been proposed using the separation of the double porosity and the quantification of the pore collapse through primary grain breakage. Finally, a general, geometrical development of a semi-analytical model has been proposed aiming the prediction of the evolution of double porosity vs axial strain.
ISSN:2196-4378
2196-4386
DOI:10.1007/s40571-021-00449-3