A5100636071- High-Velocity Impact and Material Behavior
- Microstructure and mechanical properties
- High-pressure geophysics and materials
- Energetic Materials and Combustion
- Advanced Surface Polishing Techniques
- Metal Forming Simulation Techniques
- Boron and Carbon Nanomaterials Research
- Fluid Dynamics Simulations and Interactions
- Metal and Thin Film Mechanics
- Numerical methods in engineering
- Electromagnetic Launch and Propulsion Technology
- Laser-Plasma Interactions and Diagnostics
- Magnesium Alloys: Properties and Applications
- Cardiac Imaging and Diagnostics
- Aluminum Alloys Composites Properties
- Intermetallics and Advanced Alloy Properties
- Ion-surface interactions and analysis
- Cardiovascular Function and Risk Factors
- Microstructure and Mechanical Properties of Steels
- Acute Myocardial Infarction Research
- Advanced Materials Characterization Techniques
- Educational Robotics and Engineering
- High Temperature Alloys and Creep
- Cellular and Composite Structures
- Aluminum Alloy Microstructure Properties
China Academy of Engineering Physics
2012-2024
Shenzhen Luohu People's Hospital
2023-2024
Shenzhen University
2023-2024
Institute of Fluid Physics
2009-2021
Institute of High Energy Physics
2009
The complex structural transformation in crystals under static pressure or shock loading has been a subject of long-standing interest to materials scientists and physicists. polymorphic is particular importance for iron (Fe), due its technological sociological significance the development human civilization, as well prominent presence earth's core. martensitic α→ε (bcc→hcp) shock-loading, reversible transient nature, requires non-trivial detective work uncover occurrence. Here we reveal...
Abstract The resistance of sandwich cylinders with density-graded foam cores to internal blast loadings is investigated theoretically and numerically. Four kinds core are designed, such as positive, negative, middle-high middle-low gradients. deformation process the assumed be split into three phases, i.e., fluid-structure interaction, combined inner wall stage motion. Employing a rigid perfectly-plastic locking model core, analytical models proposed predict dynamic response gradient...
Abstract Background The triglyceride glucose-body mass index (TyG-BMI index) has been suggested as a novel predictor of insulin resistance. However, its predictive value for slow coronary flow phenomenon (SCFP) in patients with ischemia and nonobstructive arteries (INOCA) remains unclear. Methods We consecutively recruited 1625 INOCA from February 2019 to 2023 divided them into two groups based on thrombolysis myocardial infarction (TIMI) frame counts (TFCs): the SCFP group ( n = 79) control...
Prior studies have suggested that the chronic inflammatory response has an important role in pathophysiology of slow coronary flow phenomenon (SCFP). However, data are scarce regarding plasma fibrinogen-to-albumin ratio (PFAR) patients having SCFP without obstructive artery disease (CAD). In this study, we investigated relationship between PFAR and presence CAD.From January 2021 to 2023, consecutively recruited 1085 CAD according diagnostic exclusion criteria. total, was diagnosed 70...
Under uniaxial shock compression, the steepness of plastic front usually exhibits power law characteristics with Hugoniot pressure, also known as ``Swegle-Grady law.'' In this Letter, we show that Swegle-Grady can be described better by a third rather than classical fourth at strain rate between ${10}^{5}--{10}^{7}\text{ }\text{ }{\mathrm{s}}^{\ensuremath{-}1}$. A simple dislocation-based continuum model is developed, which reproduced and revealed very good agreement recent experiments...
Background: Previous studies have suggested that triglyceride glucose-body mass index (TyG-BMI) is associated with cardiovascular mortality in patients undergoing peritoneal dialysis. However, the predictive value of TyG-BMI prognosis acute myocardial infarction (AMI) remains unclear. Methods: In total, 408 AMI who underwent PCI were consecutively included this study. All then divided into three groups according to tertiles TyG-BMI. The association between and major adverse cerebrovascular...
A dislocation-based constitutive model is applied to revisit the anomalous thermal hardening behavior of fcc metals under shock loading. Two scale-dependent dislocation motion mechanisms are found dominate In particular, because shear stress decay with propagation wave, relativistic effect only significant near impact surface, whereas phonon drag mechanism dominates in a macroscopic metal. Furthermore, we provide detailed picture on continuum scale, which role newly generated wave from...
The physical meaning of ductile spall fracture corresponding to the typical properties in free surface velocity curve has been discussed. A correlation between macroscopic responses and evolution mic-damage is established; pullback signal found correspond condition for nucleation voids, rate at which rises first peak beyond minima corresponds damage evolution, by using period after we can distinguish state damage.
Effects of peak stress on the properties dynamic damage evolution oxygen free high-pure copper (OFHC) are investigated. The spall fracture experiments conducted in gas gun, and process is studied using time-resolved free-surface velocity interferometry, also post-experiment metallurgical analysis soft-recovered samples. It indicated that, with increase stress, strength has little changed, but distinct differences observed magnitude rate at which rises to first beyond minima, increases...
A critical damage degree model was established for spall fracture in high-purity ductile polycrystalline metals. Three characteristic degrees (i.e., nucleation, complete plasticity, and damage) were used to divide the dynamics of evolution into four stages: void elastoplastic growth, plastic coalescence. For each stage, a physical based on regularities mechanism. Simulated results proposed coincided well with experimental ones terms serious experiments oxygen-free copper. Finally,...
A program MVFT3D of large-eddy simulation is developed and performed to solve the multi compressible Navier- Stokes equations. The SGS dissipation molecular viscosity have been analyzed, former much larger than later. Our test shows that Vreman model smaller Smagorinsky model. We mainly simulate experiment fluid instability shock-accelerated interface by Poggi in this paper. decay turbulent kinetic energy before first reflected shock wave–mixing zone interaction its strong enhancement...
A novel explanation of the quasi-elastic release phenomenon in shock-compressed aluminum is presented. dislocation-based model, taking into account dislocation substructures and evolution, applied to simulate elastic–plastic response both single-crystal polycrystalline aluminum. The calculated results are good agreement with experimental from not only velocity profiles but also shear strength density, which demonstrate accuracy our simulations. Simulated indicate that immobilization during...
As a kind of dynamic tensile failure, the spall fracture usually happened in ductile metals under shock wave loading. Also, its macroscopic softening behavior on stress caused by damage is complicated due to micro-voids nucleation, growth, and coalescence, finally forming macro-cracks material. In addition, simulated results are often mesh-dependent. Recently, phase-field model (PFM) gains popularities modeling problems. One advantages that mesh independent. The PF-CZM Wu [J. Mech. Phys....