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RISSimulation of High-Strain-Rate Comminution through a Breakage Model with Adaptive Rate Dependence
Publisher: ASCE
Abstract: While laboratory evidence suggests that particle crushing generates nonnegligible rate-dependence in granular materials, few constitutive laws reproduce such effects in light of grain-scale fracture mechanisms. This paper ...
Controllability Criteria for Soils Saturated by a Compressible Fluid
Publisher: American Society of Civil Engineers
Abstract: The liquefaction of sediments with gas bubbles occluded in the pore fluid can be studied neither through classical methods for saturated soils nor through concepts valid for unsaturated soils with continuous fluid phases. ...
Diffusive Instability of Pore Pressure Transients in Deformable Unsaturated Soils
Publisher: American Society of Civil Engineers
Is Wetting Collapse an Unstable Compaction Process?
Publisher: American Society of Civil Engineers
Abstract: This paper provides an interpretation of the phenomenon of wetting collapse in fine-grained soils based on principles of material stability. For this purpose, classic experiments displaying the accumulation of irreversible ...
DEM Modeling of Grain Size Effect in Brittle Granular Soils
Publisher: ASCE
Abstract: The size-dependent strength of individual particles controls several key aspects of the constitutive response of brittle granular materials. Capturing this factor in numerical analyses is essential to accurately model the ...
Model Prediction of Static Liquefaction: Influence of the Initial State on Potential Instabilities
Publisher: American Society of Civil Engineers
Abstract: This paper examines the influence of the initial state of sands on the potential for undrained instability. The main goal is to illustrate how advanced constitutive modeling of sand behavior can be used to evaluate the ...
Model-Based Assessment of the Effect of Surface Area Growth on the Permeability of Granular Rocks
Publisher: American Society of Civil Engineers
Abstract: This paper presents a methodology to track the evolution of hydraulic conductivity in granular rocks by accounting for the combined effect of porosity changes, grain breakage, and cement bond damage. The main objective was ...
Influence of Clay Anisotropy on Model Simulations of Wetting Collapse
Publisher: ASCE
Abstract: Recent interpretations of wetting-induced compaction revealed that water sensitivity can cause a loss of controllability in samples subjected to fluid injection. This paper elaborates these findings by focusing on fabric ...
Bounding Surface Elasto-Viscoplasticity: A General Constitutive Framework for Rate-Dependent Geomaterials
Publisher: American Society of Civil Engineers
Abstract: A general framework is proposed to incorporate rate and time effects into bounding surface (BS) plasticity models. For this purpose, the elasto-viscoplasticity (EVP) overstress theory is combined with bounding surface ...
Evolution of the Water Retention Characteristics of Granular Materials Subjected to Grain Crushing
Publisher: American Society of Civil Engineers
Abstract: This paper reports a series of experiments aimed at studying the effect of grain crushing on the water retention capacity of granular soils. Specimens of granular materials have been subjected to oedometric compression at ...