A5030053654- Metal Forming Simulation Techniques
- Metallurgy and Material Forming
- Microstructure and mechanical properties
- Adhesion, Friction, and Surface Interactions
- Advanced Surface Polishing Techniques
- Tribology and Lubrication Engineering
- Microstructure and Mechanical Properties of Steels
- Metal and Thin Film Mechanics
- Metal Alloys Wear and Properties
- Gear and Bearing Dynamics Analysis
- Hydraulic and Pneumatic Systems
- Aluminum Alloys Composites Properties
- Advanced Numerical Methods in Computational Mathematics
- Aluminum Alloy Microstructure Properties
- Advanced machining processes and optimization
- Heat Transfer and Optimization
- Numerical methods in engineering
- Non-Destructive Testing Techniques
- Heat Transfer and Boiling Studies
- Heat Transfer Mechanisms
- High-Velocity Impact and Material Behavior
- Spacecraft and Cryogenic Technologies
- Composite Structure Analysis and Optimization
- Flow Measurement and Analysis
- Phosphorus and nutrient management
Xiangshan County First People's Hospital
2024
Shandong Jianzhu University
2013-2024
Nanjing Forestry University
2020-2023
Shandong University
2011-2022
Beijing Jiaotong University
2020
Shandong University of Technology
2016
Xi'an Technological University
2015
Fujian University of Technology
2009-2011
As a critical component in mechanical equipment, the fault diagnosis of rolling bearings is great significance. Due to presence substantial noise vibration signals, extracting features becomes particularly challenging. This paper proposes method combining Variational Mode Decomposition (VMD) and Support Vector Machine (SVM) based on envelope entropy selection criterion for bearing diagnosis. First, VMD used decompose signal into several Intrinsic Function (IMF) components, spectrum these...
Temperature has a great influence on the normal operation and service life of high-power electronic components. To cope with increasingly severe heat problems in integrated circuits, an enhanced transfer factor E is introduced to evaluate comprehensive performance microchannel sinks (MCHS). The computational fluid dynamics (CFD) software was used numerically study flow characteristics cone-column combined sink. research results obtained velocity field pressure distribution sink structure...
Cold-rolled medium manganese steel (0.09C–7.23Mn–1.99Si–4.42Al wt-%) was investigated. The tested treated by inter-critical annealing quenching and partitioning process. effects of the time on microstructure mechanical properties were investigated SEM, TEM, EBSD XRD methods. results show that, consists martensite, α-ferrite, δ-ferrite retained austenite. process has a significant effect diffusion C/Mn elements significantly changes steel. At same time, austenite grain size degree dispersion...
The primary purpose of this paper is to study the size effect surface roughness and realize quantitative description in micro-forming process. This work a continuation previous by authors. effects initial specimen, grain size, orientations on micro-upsetting products were investigated. ratio number grains layer total was adopted characterize effect. variation contact normal pressure during compression process also analyzed. And evolution law for micro-formed parts realized. corresponding...
In micro-manufacture field, the micro-geometry is usually produced by coining process, and therefore researches on process of are necessary. After designing machining die with different diameters micro-holes, size effects micro-cylinder deformation in experimentally studied this paper. The ratio height h to micro-hole diameter D selected as evaluation criteria for forming degree micro-cylinder, effect h/D studied. Using microscope, electron backscatter diffraction, Vickers hardness test,...
The fluid flow in the small pore throat is a nonlinear flow, and microscopic force between wall cannot be ignored. However, previously established theories about leakage sealing interfaces have not considered influence of forces. Based on contact mechanics percolation theory, void characteristics interface were clarified, porous medium was analyzed. Combined with capillary force, concept critical radius mechanical seal proposed. resistance model rate calculation equation considering van der...
The pressure expansion performance is the key and basis for diffused self-pumping hydrodynamic mechanical seal to achieve its good cooling performance, self-cleaning sealing performance. Using moment of momentum theorem Stodola's formula, pressurization effect spiral groove on fluid was analyzed, energy head equation work done by established. According principle conservation energy, Bernoulli are derived, mathematical expression conversion kinetic into hydrostatic in diffuser established,...
To meet the requirements of energy saving and vehicle security, a novel hot stamping process named tailored tempering can be used to manufacture components with functional optimised mechanical properties. It is essential know transformation kinetics quenchable ultra-high strength steels how it influenced by related parameters. The influence deformation history on metallographic microhardness boron steel B1500HS investigated. seen that true stain exerts negative actual cooling rate. With...
A differentiation matrix method based on barycentric Lagrange interpolation for numerical analysis of bending problem elliptical plate is presented. Embedded the domain into a rectangular, in tensor form used to approximate unknown function. The governing equation discretized by derived from system algebraic equations. boundary conditions curved are directly using interpolation. Combining discrete equations and an over-constraints equations, solutions rectangular can be obtained solving it....