A5044880632- Geotechnical Engineering and Soil Mechanics
- Geotechnical Engineering and Underground Structures
- Rock Mechanics and Modeling
- Granular flow and fluidized beds
- Geotechnical Engineering and Soil Stabilization
- Geotechnical and Geomechanical Engineering
- Nonlocal and gradient elasticity in micro/nano structures
- Fluid Dynamics Simulations and Interactions
- Landslides and related hazards
- Mineral Processing and Grinding
- Heat Transfer and Optimization
- Soil, Finite Element Methods
- Heat Transfer and Boiling Studies
- Geotechnical Engineering and Analysis
- Ultrasonics and Acoustic Wave Propagation
- Composite Structure Analysis and Optimization
- Grouting, Rheology, and Soil Mechanics
- earthquake and tectonic studies
- Refrigeration and Air Conditioning Technologies
- Heat Transfer Mechanisms
- Numerical methods in engineering
- Polymer composites and self-healing
- Climate change and permafrost
- Methane Hydrates and Related Phenomena
- Thermal Analysis in Power Transmission
BOKU University
2012-2019
China Electronics Technology Group Corporation
2018
Shanghai Jiao Tong University
2014
Washington University in St. Louis
1987
Hypoplastic constitutive models are based on nonlinear tensor functions and characterized by simple formulation few parameters. In its early stage, mainly basic hypoplastic equations were concerned, where the stress is assumed as only state variable. There followed some enhanced equation including void ratio an additional this paper, we first show that widely used model Wolffersdorff seriously flawed because underlying does not perform properly. We proceed to develop a introducing new...
Summary Gas hydrate‐bearing sediments (GHBSs) have been considered as a potential energy resource. In this paper, the mechanical properties of GHBS are firstly investigated by integrated test apparatus for synthesis using silty sand skeleton. Triaxial tests indicate an obvious transition stress‐strain relationship from strain hardening under low hydrate saturation and softening high saturation. The hypoplastic models coupled with Drucker‐Prager criterion Mohr‐Coulomb proposed to analyze...
The resistance of driving a slender penetrometer into soil is often used for material characterization in geotechnical engineering. diameter usually much larger than the mean grain size and resisting pressure independent size. For miniature penetrometers, however, known to show dependence. In this paper, numerical study polydisperse granulates presented. three dimensional analyses are carried out based on discrete element method. relationships between obtained. results compared with tests...
This paper presents a combined method to model grain crushing effects with discrete element method. combines the two most commonly used concepts in DEM, i.e. replacement and agglomerate method, so that it is both accurate efficient. The can be easily implemented. performance shown by several DEM simulations of biaxial tests. Particles different crush-abilities are modeled. simulation results without compared discussed. change size distribution due also investigated.
A micro-channel heat sink is a promising cooling method for high power integrated circuits (IC). However, the understanding of such device not sufficient, because tools studying it are very limited. The details inside micro-channels readily available. In this letter, comprehensively studied using temperature sensors. highly sensitive thin film sensors can accurately monitor change in real time. outstanding dissipation performance proven terms maximum temperature, speed and resistance....
In order to study the rotational behavior of granular materials, rotation averaging methods are required. Most existing only for 2D cases and limited by shape, position size volumes. Hence, a general method is proposed in this paper. Our approach simple yet works both 3D with very little restriction. The performance shown hypothetical examples DEM simulations plane strain tests different boundary conditions.
Hypoplastic model is becoming very popular for granular materials. Unlike elastic-plastic models, there no clear boundary between elastic and plastic deformations in hypoplastic model. The behavior of material described with a nonlinear tensor equation single set parameters. In this paper, an updated used to simulate plane strain tests from Discrete Element Mothod (DEM) simulations. A DEM simulation test carried out compare the parameters are determined according stress-strain curve volume...
In the original publication of article, placement symbol sigma in last term Eq. (6) is incorrect. The correct equation should read as given below.
With the rapid development of integrated circuits (ICs), especially for RF and microwave field, three-dimensional (3-D) high performance ICs, such as GaN power amplifiers, have been widely used in many microsystem products. Resulting from this, consumption heat flux sharply risen electronic systems. Increasing demand removing 3-D ICs has become major challenge this field constrained their applications. Due to limitations conventional cooling methods, a systematic study silicon based...