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RISModeling Combined Fabric Evolution in an Anisometric Granular Material Driven by Particle-Scale X-Ray Measurements
Publisher: ASCE
Abstract: A combined fabric evolution (CFE) model is used to predict real-world fabric evolution of a strongly anisometric granular material under triaxial loading, connecting advances in theoretical developments and experimental ...
Experimental Research of the Characteristics of Microscopic Pore Production during CO2 Displacement in a Shale Oil Reservoir
Publisher: ASCE
Abstract: The evaluation method for determining the pore production range during CO2 displacement in shale cores is established based on CO2 displacement experiments, core analysis using online nuclear magnetic resonance (NMR), and ...
Formulation of Anisotropic Strength Criteria for Cohesionless Granular Materials
Publisher: American Society of Civil Engineers
Abstract: Granular materials deposited under gravity usually exhibit inherent fabric anisotropy, which leads to profoundly varying strength under different loading directions in regard to the bedding plane that has been observed ...
Dependency of Dilatancy Ratio on Fabric Anisotropy in Granular Materials
Publisher: American Society of Civil Engineers
Abstract: The relationship between dilatancy and anisotropy is a fundamental aspect of anisotropic behavior of granular materials. Existing test data directly investigating this relationship are scarce and conflicting. Discrete ...
Calculation Method for the Loose Circle of Tunnel-Surrounding Rock Considering the Strain-Softening Effect
Publisher: American Society of Civil Engineers
Abstract: During tunnel excavation, stress redistribution is caused by disturbance of the surrounding rock; when the stress exceeds the strength of rock mass, the surrounding rock enters the postpeak deformation stage and then ...
A Theoretical Calculation Method to Predict the Structural Response of an Existing Tunnel to a New Overlying Tunnel Considering Axial Force
Publisher: American Society of Civil Engineers
Abstract: Investigation of the response characteristics of existing tunnels to new tunnels underneath is the basis for a rational evaluation of the serviceability of existing tunnels. Current studies usually regard the existing ...
Evaluating the Impact of Mudstone Swelling on Railway Heave of Ballastless Tracks in the Transition Section Using the DEM-FDM Coupling Method
Publisher: American Society of Civil Engineers
Abstract: Mudstone is widely distributed in various regions of northwest China. Due to its high susceptibility to swelling when exposed to water, constructing high-speed railways in shale-prone areas often leads to track heave issues. ...
Evolution of Various Fabric Tensors for Granular Media toward the Critical State
Publisher: American Society of Civil Engineers
Abstract: The classical critical state theory of granular mechanics makes no reference to the anisotropy of the material and has thus raised questions over the uniqueness of the critical state when fabric anisotropy is taken into ...
Studies of Nail Connectors Used in Wood Frame Shear Walls with Ply-Bamboo Sheathing Panels
Publisher: American Society of Civil Engineers
Abstract: Based on Johansen yield theory (European yield model) and experimental observations, mechanical models and capacity equations for nail connectors used in wood-frame shear walls with cross-prefabricated ply-bamboo sheathing ...
Deformation of Granular Material under Continuous Rotation of Stress Principal Axes
Publisher: American Society of Civil Engineers
Abstract: The mechanical response of granular material to the rotation of stress principal axes is an issue of both practical and theoretical importance in soil mechanics. This study used a two-dimensional (2D) discrete-element ...