Constitutive modeling of structured granular materials with anisotropic grain skeleton and cement bonds

Shen, Xianda; Marinelli, Ferdinando; Buscarnera, Giuseppe

doi:10.1007/s11440-022-01717-z

Cited by 6 publications

(3 citation statements)

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“…Another internal variable, damage D, is introduced to account for the cement disintegration. The updated Helmholtz free energy Ψ depends on the damage internal variable and can be expressed, as follows [10]:…”

Section: F-cbm For Cemented Granular Materialsmentioning

confidence: 99%

Anisotropic Breakage Mechanics for cemented granular materials

Shen,

Buscarnera,

Zhang

2024

IOP Conf. Ser.: Earth Environ. Sci.

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The anisotropy of granular geomaterials is sensitive to their fabric, which exhibits anisotropic mechanical properties as a function of deposition history, microscopic fabric, and loading paths. Here, a new fabric-enriched continuum breakage model is proposed to examine the relation between elastic and inelastic anisotropy in granular materials and cemented granular materials. A microstructure model is first implemented in the framework of fabric-enriched continuum breakage mechanics (F-CBM), where the anisotropic behaviour prior to yielding is introduced through a symmetric second-order fabric tensor embedded in the expression of the elastic energy potential. The anisotropic strain energy storage prior to grain crushing leads to the rotation and distortion of the yield surface of cemented granular materials. Parametric analyses are performed to assess the overall capability of the model to characterize the anisotropic inelastic processes in cemented granular. It is shown that the proposed model can accurately predict the strong correlation between anisotropic elasticity and breakage-damage processes in cemented granular materials. When damage involving the skeleton is the dominant inelastic process, the size of the elastic domain contracts and the material exhibits augmented brittleness with the disintegration of cement. While breakage processes are predicted to dominate the response of lightly cemented granular materials resulting in hardening behaviour. This work can be further extended to dynamically capture the anisotropic response of cemented granular materials with water-sensitive mineral constituents by accounting for the evolution of microstructural anisotropy.

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Section: F-cbm For Cemented Granular Materialsmentioning

confidence: 99%

Anisotropic Breakage Mechanics for cemented granular materials

Shen,

Buscarnera,

Zhang

2024

IOP Conf. Ser.: Earth Environ. Sci.

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“…At the deep seabed with high confining pressure, grain breakage process is an interesting phenomenon, which has attracted much attention 21–24 . Some numerical simulations are carried out to study the grain breakage process and its effects on localized deformation bands formation 25–33 . For example, Ip and Borja proposed a framework for modeling breakage process during compaction band formation by coupling a phase‐field approach with modified Cam‐Clay plasticity and breakage mechanics 30 .…”

Section: Introductionmentioning

confidence: 99%

“…[21][22][23][24] Some numerical simulations are carried out to study the grain breakage process and its effects on localized deformation bands formation. [25][26][27][28][29][30][31][32][33] For example, Ip and Borja proposed a framework for modeling breakage process during compaction band formation by coupling a phase-field approach with modified Cam-Clay plasticity and breakage mechanics. 30 Wang et al developed conjugated bond-pair-based peridynamic 31,32 and phase-field model 33 for simulating fracture process and compaction bands formation, respectively.…”

Section: Introductionmentioning

confidence: 99%

A hypoplastic model for hydrate‐bearing sand considering hydrate saturation and grain breakage

Qian,

Wu,

et al. 2023

Num Anal Meth Geomechanics

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We present a hypoplastic model to capture the mechanical responses of hydrate‐bearing sands by incorporating hydrate saturation and grain breakage. In our model, a new degradation scalar is introduced to account for the effects of hydrate bonding evolution on strength. We also adopt the variable critical state line to assess the effects of hydrate saturation and relative breakage ratio at high confining pressure. This model is validated by modeling a series of laboratory tests.

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