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Online since: February 2009
Authors: O.M. Ogundipe, Y.A. Jimoh
The transport properties are a function of porosity and cracking.
Hence, an assessment of the influence of these factors on the sawdust concrete is highly desirable.
This confirms the late development of tensile properties of concrete.
References [1] Neville A.M.: Properties of Concrete.
[12] Washa, G.W.: Properties of lightweight aggregates and lightweight concrete.
Online since: January 2013
Authors: Hua Jiang Yu
PH value affects the photocatalytic degradation by causing differences in adsorption properties of toxin molecules to catalyst surface.
Research about how all kinds of factors play a role in algaecide were done.
Preparation and photocatalytic properties of nano-TiO2 mixing Si/M[J].Journal of Sichuang University, 2007, 44(4):873-877
Preparation and Photocatalytic Properties of RE-metal Co-doped TiO2 Nanoparticles[J].
Synthesis and characterization of WO3/titanate nanotubes nanocomposite with enhanced photocatalytic properties.
Online since: February 2012
Authors: Jia Long Ren, Li Gang Zhao, Yan Wang, Chun Yan Zhang, Xi Rong Tian
Finite Element Analysis Of Grinding Temperature Field With Water Vapor As Coolants Jialong Ren1,a, Ligang Zhao1,b, Yan Wang1, Chunyan Zhang1 and Xirong Tian1 1 School of mechanical engineering, Jiangsu University of Science and Technology, Zhenjiang, Jiangsu, 212003, China a zjrenjialong@yahoo.com.cn, bzhaoligang@just.edu.cn Keywords: water vapor, cooling, grinding temperature field, finite element method Abstract:Combined with the fluid mechanics, heat transfer and cooling experiments of grinding to obtain the conclusions: the water vapor with certain pressure and temperature has large heat transfer coefficient and can significantly reduce the temperature of grinding zone in grinding process.
In the end, contrasts the data between simulation and experiment of grinding temperature to prove scientific properties of the finite element method simulation.
Inverse grinding; Linear velocity of grinding wheel vs is 26.38 m/s; The percentage of heat transferred into the specimen Rw is 34%; Tangential grinding force Ft is affect by other parameters of grinding and can be calculated with empirical formula from refrences [4].
Heat transfer coefficient h between the water vapor and the specimen is affect by the surface roughness of the specimen, the stability of the water vapor flow and the thermal physical parameters and is a estimated value.
The two factors make the temperature gradient large along the grinding depth.
Online since: December 2022
Authors: Nawal Mohammed Dawood, Ayad Mohammed Nattah, Talib Abdulameer Jasim
ρ = density measured by (g/cm3). 0.13 = time and metric conversion factor.
Electrochemical mechanisms are another factor in the decline in corrosion rate.
Rafieia, Introducing a composite coating containing CNTs with good corrosion properties: characterization and simulation, RSC Advances ,Vol.6, Issue 110, 2016, pp. 108498–108512 [7] Caitlin Fisher, A.
Varadan, Mechanical properties of carbon nanotube/polymer composites, Scientific Reports volume 4, Article number: 6479, 2014, pp. 1-8 [14] J.
Windlea, Development of a dispersion process for carbon nanotubes in an epoxy matrix and the resulting electrical properties, Polymer 40 ,1999, pp.5967–5971
Online since: December 2010
Authors: Zhi Hong Pan, Ai Qun Li, Yi Gang Sun
Good agreements between analytical and experimental results of load-displacement relation are found, which indicates that the proposed analytical method can reflect the global mechanical behavior of shear wall well.
It is necessary to reveal the properties of materials and characteristics of response features [2] (such as neutral axis migration, concrete tension-stiffening, progressive crack closure, nonlinear shear behavior, and the effect of fluctuating axial force and transverse reinforcement on strength, stiffness, and deformation capacity).
The key of theory of reinforced concrete membrane elements to consider coupled flexural and shear response for RC panel is to obtain a reliable model of two dimensions behavior[8] , therefore Thorenfeldt curve[9] with a compression softening factor is introduced for constitutive skeleton curve of compressive concrete, which is given as:
The reduction factor to be applied to the peak compressive stress for concrete in compression is given as:
The constitutive law of concrete affects the accuracy of analytical response of boundary zone of shear wall immediately.
Online since: August 2011
Authors: Ji Qun Zhang, Hui Ming Jin, Ji Cheng Gao, Jun Shi, Lu Li
Influence of depositing parameters on microstructure of Ni-Co pulse plating GAO Ji-cheng , JIN Hui-ming*, ZHANG Jiqun, SHI Jun, LI Lu College of Mechanical Engineering, Yangzhou University, Yangzhou,China.
Respect to alloy electroplating, electric plating components is the important factors that affect coating performance.
Study on Electroforming Processing and Properties of Ni-Co Alloy[J].
Effect of peak current density on mechanical propertiesof nanocrystalline nickel–cobalt alloy coating produced by pulse electrodeposition[J].
Online since: March 2014
Authors: Lin Zheng Ren, Teng Fei Lei, Heng Chen, Rong Wang
Control on the D-PMSG property is less chaotic.
Wind turbines convert wind energy into mechanical energy.
The mechanical energy is converted into electrical energy generator.
Many factors affect the wind turbine, such as wind speed , air density, a radius of wind turbines R .When S is swept area, the power absorption of wind turbine is (1) K is the utilization coefficient of wind energy in equation (1).
Adaptive backstepping control of chaotic property in direct-driven permanent magnet synchronous generators for wind power [J].
Online since: September 2013
Authors: Jian Fen Li, Wei Yi Dan, Min Wang, Jie Feng Ding, Guo Qing Zhou, Qiang Sheng Wang
Introduction Nano-Al2O3 with various properties has been widely investigated within years due to its stable properties under extreme condition [1], high resistance to corrosion [2], low thermal conductivity and so on.
The morphology and the particle size are key factors affecting the usage and application of the nano-materials.
Another substrate material copper alloy also has been used to prepare nanostructure Cu-Al2O3 powder, which exhibits strengthened mechanical properties [6].
Online since: May 2011
Authors: Heng Quan, Zhen Ya Gu
Generally speaking, the contribution of hard monomers to the properties of polyurethane should mainly takes on the physical and mechanical characteristics[1,9,11].
Obviously, the most important factor affects the water vapor transition in the soft segment domain is the chain mobility of soft segment, which is related with domain structure.
The phenomenon again verified the much more important role of hydrophilic groups for the properties of hydrophilic polyuretanes.
Domain structure and properties.
Conclusions 1 Factors that influence the moisture permeability of hydrophilic polyurethane includes the structure, average molecular weight, concentration of soft segment and ether bond content, the latter is more important to its application properties.
Online since: April 2021
Authors: Md Tanbir Sarowar
Azadbeh, Microstructure–mechanical properties correlation in spark plasma sintered Ti–4.8 wt.% TiB2 composites, Mater.
Lee, Mechanical properties of ZrB2- and HfB2-based ultra-high temperature ceramics fabricated by spark plasma sintering, J.
Guo, Densification of ZrB2-based composites and their mechanical and physical properties: A review, J.
Daw, Ab Initio Computations of Electronic, Mechanical, and Thermal Properties of ZrB 2 and HfB 2, J.
Yamanaka, Mechanical and thermal properties of bulk ZrB2, J.
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