Micromechanical investigation of the shear behaviors of sand‒rubber mixtures using a multibody meshfree method

This study investigates the effect of rubber content ( RC ) on the mechanical properties of sand‒rubber mixtures (SRMs) using a multibody meshfree approach, which permits faithful modeling of the deformation of rubber particles. A series of two-dimensional simple shear tests is performed on SRMs wit...

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Bibliographic Details
Published in:Granular matter 2022-08, Vol.24 (3), Article 73
Main Authors: Hu, Z., Shi, Y. H., Guo, N., Yang, Z. X.
Format: Article
Language:English
Subjects:
Complex Fluids and Microfluidics
Contact force
Coordination numbers
Engineering Fluid Dynamics
Engineering Thermodynamics
Foundations
Geoengineering
Heat and Mass Transfer
Hydraulics
Industrial Chemistry/Chemical Engineering
Kinematics
Materials Science
Mechanical properties
Meshless methods
Mixtures
Original Paper
Physics
Physics and Astronomy
Rubber
Sand
Sand & gravel
Shear strength
Shear tests
Shearing
Simple shear tests
Soft and Granular Matter
Strain localization
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Summary:This study investigates the effect of rubber content ( RC ) on the mechanical properties of sand‒rubber mixtures (SRMs) using a multibody meshfree approach, which permits faithful modeling of the deformation of rubber particles. A series of two-dimensional simple shear tests is performed on SRMs with different RC . The results indicate a decreased peak shear strength but an increased residual shear strength with increasing RC . The evolutions of microscopic features during shearing are examined. Both the coordination number and the contact length of SRMs progressively increase with RC owing to the deformation of rubber particles. The primary force transmission is sustained by sand particles for SRMs with smaller RC , but controlled by both sand and rubber particles with larger RC . The incorporation of rubber particles results in more uniformly distributed contact forces compared to the pure sand specimen. The particle kinematics reveals and explains the less vulnerability of SRMs to strain localization. Graphic Abstract
ISSN:1434-5021
1434-7636
DOI:10.1007/s10035-022-01236-4