A5049682762- Concrete and Cement Materials Research
- Advanced ceramic materials synthesis
- Concrete Properties and Behavior
- Numerical methods in engineering
- Advanced materials and composites
- Concrete Corrosion and Durability
- Vibration and Dynamic Analysis
- Phase Change Materials Research
- Muon and positron interactions and applications
- Composite Material Mechanics
- Composite Structure Analysis and Optimization
- Adsorption and Cooling Systems
- Grouting, Rheology, and Soil Mechanics
- Rock Mechanics and Modeling
- High-Temperature Coating Behaviors
- Hydrogen Storage and Materials
- Recycling and Waste Management Techniques
- Nonlocal and gradient elasticity in micro/nano structures
- Aluminum Alloys Composites Properties
- Molten salt chemistry and electrochemical processes
- Structural Integrity and Reliability Analysis
- Innovative Educational Techniques
- Heat Transfer and Optimization
- Radiative Heat Transfer Studies
- Geothermal Energy Systems and Applications
Oak Ridge National Laboratory
2021-2024
Chongqing University of Posts and Telecommunications
2024
Zhejiang University of Technology
1994-2023
Government of the United States of America
2023
Aero Engine Corporation of China (China)
2022
Hong Kong Metropolitan University
2020-2021
University of California, Davis
2005-2007
Rutgers, The State University of New Jersey
2003-2006
Nanomaterials Research (United States)
2003
University of Dundee
2003
The nonlinear vibrations developing in sheets and strips during rolling are of practical technological importance theoretical interest. However, the existing numerical methods adopted research plagued by problems such as computational inefficiency, difficulty dealing with bifurcations, slow convergence frequency cancellations. This study develops an analytical method for solving problem rolled strip quasi‐periodic motions resonant state. First, conventional incremental harmonic balance is...
The economic viability of high-strength carbon fibers is pivotal for their integration into Type IV compressed hydrogen storage tanks. Oak Ridge National Laboratory advancing this objective by developing cost-effective, textile-grade polyacrylonitrile (PAN) precursor through an optimized wet spinning-process to garner more microstructural control over the fibers. This study examines characteristics PAN fibers, particularly crystalline orientation factor, and impact on mechanical properties...
Interfacial transition zones (ITZ) in concrete constitute the weakest link matrix and significantly affect properties of concrete. To evaluate quantitatively effect ITZ on physical mechanical behaviour concrete, it is imperative to characterise microstructure ITZ. The intention this paper investigate characteristics a statistical manner. In paper, an algorithm developed simulate distribution cement particles between aggregates After verifying with experimental data, models for thickness area...
Rapidly solidified ZrO 2 (Y O 3 )–Al powders were prepared by melting fine‐particle aggregates in a high‐enthalpy plasma flame and then rapidly quenching them cold water or on copper chill plate. To ensure complete homogenization of all the particles before quenching, water‐quenching treatment was often repeated two even three times. The resulting melt‐quenched splats displayed variety metastable structures, depending composition cooling rate. ‐rich material developed an extended solid...
First Name is required invalid characters Last Email Address Invalid
Based on practical engineering, considering the characteristics of unsymmetrical loading, shallow burying, and weak surrounding rock tunnel, MIDAS finite element software is adopted to analyze influence effect deformation a temporary steel support when tunnel excavated by two-step center diaphragm method (CDM). The simulation results are compared with field monitoring results. It can be seen that: (1) Affected settlement right spandrel obvious. existence reduces at greatly, making...
Concrete is usually considered to be a two-phase material for the prediction of its mechanical properties. More research has, however, shown that there exists an interfacial transition zone (ITZ) between aggregates and cement paste. As such, concrete should modelled as three-phase at mesoscopic level. This paper presents numerical method can predict elastic modulus with reasonable accuracy. In this method, mesostructure simulated finite element employed stress analysis in concrete. addition,...
Abstract The simulation model represents the microstructure that can accurately analyze and predict composites’ micro-stresses mechanical properties. conventional representative volume element (RVE) only contain one single-particle form. It makes all particles in have same shape, which is significantly different from actual particles. In present study, four typical particle-modeling methods were adopted to establish geometric models particle morphology RVE size selection rules. Particles...
In this work we present images of carbon fiber fractured surfaces observed for the first time by Helium Ion Microscopy (HIM) at high magnifications, aiming to capture defects ranging in size between 10 nm and 100 nm. Nominal critical defect sizes various commercial fibers were calculated from Griffith Equation their distributions Weibull strength distributions. HIM with standard modulus (~230 GPa), intermediate (~280 (>350 GPa) ultra-high (>6.8 are shown have contrasting microstructures....
Marine clay has been attracting in-depth research on its mechanical behavior and internal structure evolution, which are crucial to marine infrastructure safety. In the formation process of clay, including sedimentation consolidation stages, compression evolution highly dependent pore water salinity. Discrete element method (DEM) simulation is a powerful tool study microscopic mechanics behind complicated macroscopic clay. this study, DEM scheme systematically proposed numerically beahvior...
For the first time, a trifunctional high-temperature AlN ceramic material that combines extreme wicking, evaporative, and cooling functionalities for enhancing efficiency of evaporation-based technologies was created through engineering hierarchical surface nano/microstructure. The developed interfacially-engineered structure is an array tapered micropillars, which textured with irregular/regular nanostructures. exhibits excellent in temperature range 23–230 °C, both absence presence...
The effect of aggregate shape on the chloride diffusivity concrete is studied. To represent heterogeneity concrete, a three-phase composite ellipse model constructed and relative dimensions are determined by calculating area fraction interfacial transition zone in numerical manner. height each bar lattice mesh derived analytically. method then used to estimate concrete. After validity verified with experimental results, evaluated quantitative
Concrete is usually considered to be a two-phase material for the prediction of its mechanical properties. More research has, however, shown that there exists an interfacial transition zone (ITZ) between aggregates and cement paste. As such, concrete should modelled as three-phase at mesoscopic level. This paper presents numerical method can predict elastic modulus with reasonable accuracy. In this method, mesostructure simulated finite element employed stress analysis in concrete. addition,...
A simple and efficient spline integral equation method is presented in this paper for the axisymmetrical bending of circular plates with large deflection. Based on two second-order differential equations terms slope deflection surface radial displacement plate, are derived. The plate then equidistantly divided into a element series annular elements along its direction both approximated by cubic interpolation. solved numerically displacements internal forces at any point within can be...
The technology of network information promotes the change modern education and teaching mode. Based on Small-scale Online Course (SPOC), mixed mode can take fully advantages traditional online though combination offline teaching, which becomes trend development in era network. Under this background, course "Project Management Engineering" constructs "four-stage" process according to concept mode, adopts diversified examination method, spurs students' subjective initiative learning,...