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Consistency behavior and mechanism of the irreversible dilatancy of gravel–structure interface subjected to 3D loadings
https://orcid.org/http://orcid.org/0000-0002-2201-2331
Irreversible dilatancy, a component of volumetric change due to shearing, is a key characteristic of soil–structure interfaces. A series of 3D large-scale direct-shear tests was conducted on a gravel–structure interface to explore the consistency behavior and mechanism of the irreversible dilatancy subjected to various 3D loadings. Irreversible dilatancy is primarily induced by particle crushing and grows monotonically and smoothly due to cyclic shearing. It presents distinct 3D features determined by 3D loading conditions, such as shear path type, tangential displacement amplitude, displacement amplitude ratio, and normal stress. The effect of 3D loading conditions on the irreversible dilatancy is attributed to varied shear work density induced by shearing. Increased tangential displacement amplitude, displacement amplitude ratio, and normal stress lead to enlarged shear work density, thereby enhancing the particle crushing, increasing the relative interface breakage and magnifying the irreversible dilatancy. Consistency behavior is discovered to identify the unique relationship of the irreversible dilatancy against shear work density, independent of 3D loading conditions, and can be captured perfectly by the hyperbolic model for unification, which considerably simplifies the 3D constitutive modeling of the interface. If the interface is sufficiently sheared, an ultimate grain size distribution is found to exist, at which the particles are crushed negligibly, and the relative interface breakage and irreversible dilatancy achieve ultimate magnitudes. They also correspond to the internal and macroparameters for quantifying the particle crushing and physical evolution of the interface, respectively.
Consistency behavior and mechanism of the irreversible dilatancy of gravel–structure interface subjected to 3D loadings
https://orcid.org/http://orcid.org/0000-0002-2201-2331
Irreversible dilatancy, a component of volumetric change due to shearing, is a key characteristic of soil–structure interfaces. A series of 3D large-scale direct-shear tests was conducted on a gravel–structure interface to explore the consistency behavior and mechanism of the irreversible dilatancy subjected to various 3D loadings. Irreversible dilatancy is primarily induced by particle crushing and grows monotonically and smoothly due to cyclic shearing. It presents distinct 3D features determined by 3D loading conditions, such as shear path type, tangential displacement amplitude, displacement amplitude ratio, and normal stress. The effect of 3D loading conditions on the irreversible dilatancy is attributed to varied shear work density induced by shearing. Increased tangential displacement amplitude, displacement amplitude ratio, and normal stress lead to enlarged shear work density, thereby enhancing the particle crushing, increasing the relative interface breakage and magnifying the irreversible dilatancy. Consistency behavior is discovered to identify the unique relationship of the irreversible dilatancy against shear work density, independent of 3D loading conditions, and can be captured perfectly by the hyperbolic model for unification, which considerably simplifies the 3D constitutive modeling of the interface. If the interface is sufficiently sheared, an ultimate grain size distribution is found to exist, at which the particles are crushed negligibly, and the relative interface breakage and irreversible dilatancy achieve ultimate magnitudes. They also correspond to the internal and macroparameters for quantifying the particle crushing and physical evolution of the interface, respectively.
Consistency behavior and mechanism of the irreversible dilatancy of gravel–structure interface subjected to 3D loadings
https://orcid.org/http://orcid.org/0000-0002-2201-2331
Irreversible dilatancy, a component of volumetric change due to shearing, is a key characteristic of soil–structure interfaces. A series of 3D large-scale direct-shear tests was conducted on a gravel–structure interface to explore the consistency behavior and mechanism of the irreversible dilatancy subjected to various 3D loadings. Irreversible dilatancy is primarily induced by particle crushing and grows monotonically and smoothly due to cyclic shearing. It presents distinct 3D features determined by 3D loading conditions, such as shear path type, tangential displacement amplitude, displacement amplitude ratio, and normal stress. The effect of 3D loading conditions on the irreversible dilatancy is attributed to varied shear work density induced by shearing. Increased tangential displacement amplitude, displacement amplitude ratio, and normal stress lead to enlarged shear work density, thereby enhancing the particle crushing, increasing the relative interface breakage and magnifying the irreversible dilatancy. Consistency behavior is discovered to identify the unique relationship of the irreversible dilatancy against shear work density, independent of 3D loading conditions, and can be captured perfectly by the hyperbolic model for unification, which considerably simplifies the 3D constitutive modeling of the interface. If the interface is sufficiently sheared, an ultimate grain size distribution is found to exist, at which the particles are crushed negligibly, and the relative interface breakage and irreversible dilatancy achieve ultimate magnitudes. They also correspond to the internal and macroparameters for quantifying the particle crushing and physical evolution of the interface, respectively.
Consistency behavior and mechanism of the irreversible dilatancy of gravel–structure interface subjected to 3D loadings
Acta Geotech.
Feng, Dakuo (Autor:in) / Zhang, Jianmin (Autor:in)
Acta Geotechnica ; 19 ; 4637-4653
01.07.2024
17 pages
Aufsatz (Zeitschrift)
Elektronische Ressource
Englisch
3D loading condition , Consistency behavior , Constitutive description , Gravel–structure interface , Irreversible dilatancy , Particle crushing Engineering , Geoengineering, Foundations, Hydraulics , Solid Mechanics , Geotechnical Engineering & Applied Earth Sciences , Soil Science & Conservation , Soft and Granular Matter, Complex Fluids and Microfluidics
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