This study investigated the influence of water injection timing on compression deformation loose rock blocks in goaf. The used a confined gradient loading test to examine under initial saturation and later immersion conditions. results showed that saturation, each whole stage was greater than stage. Additionally, different stages saturated state relatively regular, while state, changed abruptly...

High-strength concrete can effectively reduce the cross-sectional size, increase space usage, and cut material costs. To analyze mechanical properties of high-strength vertical members, various confinement models have been proposed to define ties-confined stress–strain relationship. However, most existing are divided into ascending descending segments. These continuous but not derivable at peak...

One of the main challenges in using the Discrete Element Method (DEM) is to specify the correct input parameter values. In general, the models are sensitive to the input parameter values and accurate results can only be achieved if the correct values are specified. For the linear contact model, micro-parameters such as the particle density, stiffness, coefficient of friction, as well as the par...

A time- and depth-dependent Poisson's ratio has been observed during unconfined compression experiments on articular cartilage, but existing cartilage models have not fully addressed these phenomena. The goal of this study was to develop a model which is able to predict and explain these phenomena, while also being able to fit other experimental scenarios on full depth cartilage specimens such ...

Axial compression was conducted on micro-pillars, in which polycrystalline Cu thin films were sandwiched between CrN and Si. Plastic flow of Cu was achieved, when the Cu films are inclined either at 90° or 45° with respect to the pillar axis. The texture of Cu films was altered by changing the template on which film growth occurred. The Cu microstructure was further altered by post-deposition a...