A5100722652- Granular flow and fluidized beds
- Landslides and related hazards
- Rock Mechanics and Modeling
- Geotechnical Engineering and Underground Structures
- Geotechnical Engineering and Soil Mechanics
- Fluid Dynamics Simulations and Interactions
- Particle Dynamics in Fluid Flows
- Structural Behavior of Reinforced Concrete
- High-Velocity Impact and Material Behavior
- Soil and Unsaturated Flow
- Numerical methods in engineering
- earthquake and tectonic studies
- Composite Material Mechanics
- Flood Risk Assessment and Management
- Geotechnical Engineering and Analysis
- Geotechnical and Geomechanical Engineering
- Advanced Neural Network Applications
- Concrete and Cement Materials Research
- Seismic Imaging and Inversion Techniques
- Fluid Dynamics and Heat Transfer
- Atmospheric and Environmental Gas Dynamics
- Nonlocal and gradient elasticity in micro/nano structures
- Concrete Properties and Behavior
- Extraction and Separation Processes
- Soil Mechanics and Vehicle Dynamics
Hanoi University
2021-2025
National University of Civil Engineering
2019-2024
Hanoi University of Science and Technology
2024
Le Quy Don Technical University
2024
Can Tho University of Medicine and Pharmacy
2023
Can Tho University
2016-2023
Vietnam Academy of Science and Technology
2018-2022
Ventana Research Corporation (United States)
2022
Thuyloi University
2021
Michigan State University
2015
This paper presents the results of an experimental investigation mechanical behaviour silty sand regarding instability phenomena using conventional triaxial tests under drained and undrained conditions. First, a series monotonic was carried out on reconstituted clean samples with emphasis placed effect basic parameters such as relative density confining pressure. To highlight fines content initiation critical state, second conducted sand/silt mixture different percentages fines. In this...
Using the three-dimensional discrete element method, we numerically investigate collapse dynamics and deposition morphology of low-viscocohesive granular columns on a rough-horizontal plane by systematically varying broad range values initial column aspect ratio, cohesive stress, liquid viscosity. The results show that kinetic energy, half runout time, distance increase with increasing ratio but decrease viscous effects binding liquid, while toe angle deposit height stress Remarkably,...
ABSTRACT The granular column collapse is a simple model to study natural disasters such as landslides, rock avalanches, and debris flows because of its potential provide solid links physical mechanical properties these catastrophic flows. Such are commonly composed different grain‐size distributions, namely, polydispersity. Owing the complexity particle‐size phases, explanations dynamics, run out distance, size‐segregation behavior remain elusive. A binary‐size mixture materials well‐known...
Abstract. The Red River (Vietnam) is representative of a south-east Asian river system, strongly affected by climate and human activities. This study aims to quantify the spatial seasonal variability CO2 partial pressure emissions lower system. Water quality monitoring riverine pCO2 measurements were carried out for 24 h at five stations distributed along system during dry wet seasons. was supersaturated relative atmospheric equilibrium (400 ppm), averaging about 1589±43 ppm resulting in...
Abstract In this paper, we present a multi‐scale model that combines the finite element method (FEM) and discrete (DEM) to study behaviour of cemented granular materials (CGM) at both sample (macroscopic) particle (microscopic) scales, taking into account inter‐ intra‐granular cracking. At microscopic scale, material is made up Volume Elements (VE) composed particles. Their mechanical modelled by DEM. VEs, find circular grains (single particles) meso‐grains; meso‐grains being clusters...
The shear behavior of reinforced concrete (RC) beams has been the principal subject research studies. However, structural RC deep beam without reinforcement is still complex and not well-understood. A total sixteen corroded specimens were investigated in this numerical study. finite element results confirm validity developed constitutive models by comparing load - displacement curves failure modes obtained two experimental It showed that corrosion longitudinal decreased load-carrying...
Improving the machinability of titanium (Ti) alloys remains unresolved for manufacturing industries because excessive tool wear and catastrophic failures lead to shortened life low productivity with any available cutting system. Besides optimizing substrate and/or coating materials tools, improving cooling lubricating conditions is one ways improve Ti alloys. In this paper, we explore possibility using a nano-platelet, lamellar-type solid lubricant graphite Exfoliated nano-platelets (xGnP®)...
Ground reaction in terms of stress and displacement analysis is one the major challenges tunnel design helpful for understanding stability around excavation zone. In this paper, stress, strain responses radial circular excavated cohesive-frictional granular materials discussed via an innovative multi-scale approach (FEM × DEM) that combined finite element (FEM) discrete (DEM) methods compared to other solutions obtained with conventional constitutive laws. Thanks simulations, (i) response...
Penetration of intruders into granular packings is well described by separately considering the dry or wet case environments in previous experiments and simulations; however, unified description such penetration depth these two media remains elusive due to lacking clear explanations about its origins. Based on three-dimensional discrete element method simulations, we introduce a power-law fitting form final spherical intruder with low velocity vertically penetrating packings, excellently...
Background: Identification of HER2 protein overexpression and/or amplification the gene are required to qualify breast cancer patients for targeted therapies. In situ hybridization (ISH) assays that identify function as a stand-alone test determination status and rely on manual quantification number genes copies chromosome 17 determine amplification. Methods: To assist pathologists, we have developed uPath Dual ISH Image Analysis Breast (uPath DISH IA) algorithm, an adjunctive aid in...
High rate Li-ion batteries have been given great attention during the last decade as a power source for hybrid electric vehicles (HEVs, EVs, etc.) due to highest energy and density. These lithium required new design of material structure well innovative electrode materials. Among promising candidates, spinel Li 4 Ti 5 O 12 has proposed high anode replace graphite because capacity negligible change intercalation lithium. In this work, we synthesized in nanosize by solution route using LiOH...
This paper investigates the influence of intergranular friction and grain size distributions on initial void ratio a granular sample subjected to isotropic compression loading. In field geomechanics, besides loading path evolution microscopic properties, is crucial key factor that governs mechanical behavior geomaterials. By using Discrete Element Model (DEM) performed an idealized 2D assembly disks, this study demonstrates can be affected by several parameters during stage. varying wide...
Abstract In the last decade, a new multi‐scale FEM×DEM approach has been developed using Finite Element Method (FEM) coupled with Discrete (DEM) as constitutive law to account for specificities of mechanical behavior granular materials. model, DEM calculation is performed on particle assembly (volume element—VE) at each Gauss point. Recent publications have demonstrated that naturally captures discrete and anisotropic nature Despite its advantages, classical FEM, suffers from mesh...