A5082213945- Geotechnical Engineering and Soil Mechanics
- Geotechnical Engineering and Underground Structures
- Geotechnical Engineering and Soil Stabilization
- Landslides and related hazards
- Grouting, Rheology, and Soil Mechanics
- Catalytic Processes in Materials Science
- Nuclear Physics and Applications
- Fluid Dynamics Simulations and Interactions
- Nuclear reactor physics and engineering
- Civil and Geotechnical Engineering Research
- Electrocatalysts for Energy Conversion
- Seismic Performance and Analysis
- 3D IC and TSV technologies
- Ammonia Synthesis and Nitrogen Reduction
- Electrochemical Analysis and Applications
- Electronic Packaging and Soldering Technologies
- Aluminum Alloys Composites Properties
- Dam Engineering and Safety
- MXene and MAX Phase Materials
- Particle accelerators and beam dynamics
- Advanced Photocatalysis Techniques
- ZnO doping and properties
- Soil, Finite Element Methods
- Geotechnical Engineering and Analysis
- Advancements in Solid Oxide Fuel Cells
Tianjin University of Science and Technology
2023-2025
Southwest Jiaotong University
2020-2024
Tsinghua University
2024
Hong Kong University of Science and Technology
2002-2018
University of Hong Kong
2002-2017
Micromechanical modeling provides significant insight into the fundamental mechanism of soil liquefaction. In this study, a series undrained cyclic simple shear simulations were conducted by using discrete element method (DEM). The particle-scale information provided DEM was used to quantify local void distribution around particles. Two microscale descriptors, named as shape-elongation descriptor (Ed) and orientation-anisotropy (Ad), proposed overall anisotropy in granular packing. Before...
The initial fabric has great influence on the cyclic behaviours of sands. In this study, numerical simulations by discrete-element method (DEM) were conducted to study effects sands their liquefaction resistance and post-liquefaction behaviour. Nine samples with different but same void ratio prepared pre-shearing method, then subjected 47 simple shear tests. DEM simulation demonstrated that higher degrees anisotropy have much lower compared an isotropic sample. By incorporating fabric, a...
A concentration of building damage and slope failure near the crest has been observed during numerous earthquakes. Documented researches have shown that combination topography geological structure (joint) significantly affects seismic response slope. To investigate this issue, a series numerical simulation analyses are performed for containing horizontal joints by varying normalized joint stiffness (K), ratio normal to shear (kn/ks), spacing, height, angle, loading frequency. The...
Cyclic liquefaction of sands is influenced by many factors including the initial fabric. Yet, it difficult to quantify soil fabric using laboratory technology. In this study, discrete element method (DEM) used numerically simulate process under undrained cyclic loading. Samples with same void ratio and varying degrees anisotropy are prepared pre-shearing method. Fabric evolution before after quantified coordination number, angular distribution principal direction inter-particle contacts. The...
DC hot switching lifetime for Au-Au-contact MEMS switch is studied in this work, which the applied voltage varies from 5 to 8 V. Weibull distribution analysis employed data processing, and scale parameters (λ), shape (k) 50% of population failure point (T50) are fitted calculated. This work shows two distinctive advancements: (a) illustration device evolution quasi-Exponential (k≈1) quasi-Rayleigh (k≈2) quasi-Normal (k>4) according different voltages; (b) mathematic relationship...
Understanding evolution of microstructure in granular soils can provide significant insights into constitutive modeling soil liquefaction. By tracing all particle movement, the discrete element (DEM) quantifies a assemblage using variety fabric indices, such as numbers contacts, orientation contact normal, well particles, and voids distribution. The DEM simulations revealed change particle-void to strongly anisotropic state after initiation Large flow deformations post-liquefaction stage...