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Online since: September 2021
Authors: Yu Jiang, Jia Yun Cao, Xiao Min Zhang, Hong Bo Chen
Influencing factors optimize the design of the wedge clamp so that the ACCC can be more widely used.
Fig. 2 describes the components and main influencing factors of the CFRP and the wedge clamp.
Definition of material properties.
The axial and radial mechanical property parameters are shown in Table. 1.
The mechanical properties are obtained according to the test data provided by the manufacturer.Fig. 2: Components and main influencing factors of CFRP and strain clamp Fig. 3: Dimension of CFRP and strain clamp Meshing.
Online since: September 2014
Authors: Hilmi Mukhtar, Maizatul Shima Shaharun, Samah B. Daffalla
The physiochemical properties of the developed adsorbents were evaluated.
To upgrade or improve the adsorption properties of the RH, thermal treatment of rice husk has been established.
Factors affecting sorption, such as contact time and pH were investigated.
The kinetics of the adsorption of phenol was studied in batch experiment by using a GFL mechanical shaker (3017).
In order to compare the textural properties of adsorbents, the parameter obtained from BET surface area, pore volume and pore diameter are tabulated in Table 2.
Online since: February 2022
Authors: Vladislav Khotinov, Mikhail Erpalov
The article is devoted to studying the rheological properties of metals and alloys in a cold state based on the results of tensile tests of cylindrical specimens.
Introduction Tensile testing is one of the most widely used methods for studying the properties of metals and alloys [1].
However, according to the results of tensile tests, the dependence of flow stresses on the strain, which characterizes the rheological properties of materials [2, 3], can be also determined.
Note that the elongation values are influenced by many factors during testing.
The length of the working part of the specimen also affects the elongation values.
Online since: December 2011
Authors: Hai Yun Gao, Kun Lu, He Li Luo, Shang Ping Li, Dong Yun Zhang
Laser welding double-sided tensile properties test shows the tensile strength at room temperature is 555 Mpa and 400 Mpa under 1000°C.
As it can be seen from the graph, welding speed in the technology factors has an important impact on crack sensitivity.
In weld microstructure the proportion of columnar crystal and equiaxial crystal decides to mechanical properties of welding.
In the experimental research, the mean of double-sided welding realizes the MX246A alloy welding, and performance of welding joint is more than 75% of the base material properties in the conditions of no other heat treatment.
When molten pool freezes, imbalance solidification causes the uneven distribution and high concentration of Mo at high temperature is oxidized, which produces adverse impact. 3) Laser welding double-sided tensile properties test shows that the tensile strength at room temperature is 555 Mpa, and is 400 Mpa under 1000°C.
Online since: May 2011
Authors: Fu Shan Chen, Huan Fei Xu, Xiu Ying Jiang, Song Lin Wang
The impact of highly cationic density polymers such as modified poly-ethyleneimine(PEI), as anionic trash catcher(ATC) on the drainage and retention properties of aspen alkaline hydrogen peroxide mechanical pulp(APMP) in different CPAM(/bentonite) systems was studied.
Due to these differences in physical and chemical properties between HYP and chemical pulp, the drainage and retention effectiveness of CPAM would be reduced in HYP [5-7].
So it is important to investigate the effect of CPAM on the drainage and retention properties of APMP.
The first hand sheet and beating degree were made without chemical additions to evaluate the properties of furnish which only included fibers and filler.
Results and discussion Effect of CPAM (/bentonite) system on the retention and drainage properties of APMP Firstly, the impact of two kinds of CPAM on the retention and drainage properties of APMP was studied respectively in the following experiments.
Online since: February 2011
Authors: Li Jun Wang, Dong Po Wang, Yu Liu
Ultrasonic surface rolling processing (USRP) is a surface nanocrystallization method developed recently, which can bring metal surface with superior properties.
Majzoobi et al. and Shivpuri Rajiv et al. have simulated the multi-shots case and discussed the influencing factors on peening residual stress [6,7].
Material Properties and Model Verification. 40Cr steel, which is often used as shaft material, is adopted for numerical simulation.
Material properties for 40Cr are: ρ (density) = 7820 kg/m3, E (elasticity modulus) = 210 GPa and υ (Poisson’s ratio) = 0.3.
The spindle speed affects the impact density.
Online since: September 2013
Authors: Song Lin, Ran Zhang, Chuan Yang Liu, Zhuang Ma
The major factors influencing the biological treatment efficiency are temperature, moisture, oxygen content, C/N ratio, PH value, etc [6].
Shear Flow Fig. 1 Flow pattern of agitator The mechanical energy can be passed to the fluid when the blender is rotating.
The shaft power is the power to overcome the fluid resistance, excluding the power consumed by friction of mechanical transmission.
The selection of blender type is based on stirring purpose, kitchen waste properties, container volume, etc.
Define the operating environment and the physical properties of fluid.
Online since: October 2012
Authors: Yue Zang, Xiao Ming Xu, Zhi Guo Zhuo, Hai Zhou, Ruo Xi Xu, Huan Feng
Introduction The sapphire substrate is in the lighting industry in the most widely used LED substrate material, having excellent optical properties, mechanical properties and stable chemical properties [1,2], its precision machining technology, which mainly includes: slicing, grinding or grinding, chemical mechanical polishing, cleaning process.
As a result of slice method in wire cutting, it has the advantages of high efficiency, high yield, no pollution and other advantages[3], and it replaced the traditional inner circular slice method, but the line cutting on substrate surface caused by corrugated ( roughness) [4,5], therefore it must be manufactured after line cutting process in removal of surface wave lines, otherwise it will seriously affect the quality of the surface of a substrate.
Grinding wheel is resin-bonded grinding wheel, the size is 150mm × 20mm × 60mm, the abrasive particle size is W28. 2.2 Grinding process parameters In order to reduce the impact of factors unrelated to the grinding experimental results, the two grinding way are using the same process parameters, the only difference is the traditional grinding and HNBR industry rubber pad grinding, rubber pad is located between ceramic support blocks and substrate, rubber pad has been open small holes, through the holes in the substrate under pressure to vacuum adsorption rubber pad surface. 2.3 Grinding experiment results We detect the traditional grinding and the cushion grinding(Adding a rubber pad between the substrate and the worktable ) by optical microscope, observing the surface morphology, Shown in figure 5,among of them , the substrate’s surface morphology of the traditional grinding.
Online since: May 2012
Authors: Song Yan Li, Zhao Min Li
In this paper, a new type of high temperature plugging agent of tannin foam system was researched, and the influencing factors on it were analyzed.
In this paper, a new type of high temperature plugging agent of tannin foam system was researched, and the influencing factors on it were analyzed.
Considering the gel strength, gelling time and other factors, the eighth set of the experiments is selected as the optimal formula.
Crosslinking agent concentration will directly affect the gelling time and gel strength of tannin, so influence factor research of crosslinking agent appears particularly important.
The influencing factors of concentration of each component, salt tolerance and temperature resistance were analyzed.
Online since: February 2012
Authors: Hong Shen, Zhi Shan Duan, Fei Li
Analysis of Combination mode about vibration mixer in concrete mixing mechanics Hong Shen1, a, Zhi-shan Duan2,b, Fei Li 3,c 1 College of Mechanical and Electrical Engineering, Xi’an university of architecture & Technology, Xi’an, China 2 College of Mechanical and Electrical Engineering, Xi’an university of architecture & Technology, Xi’an, China 3 College of Mechanical and Electrical Engineering, Xi’an university of architecture & Technology, Xi’an, China asophia_shenhong@sohu.com, bwykjj@163.com, cjidianjiaoxueban@163.com Keywords: vibratory mixing, isotropy of concrete mixtures, compressive strength of concrete hardening test cube, chaotic vibration Abstract: The author, in this text, introduces the methods of the vibratory mixing, and gives the comparison and evaluation of the existent vibratory mixing methods.
Firstly, the vibration parameter selection is reasonable will not require physical, mechanical properties; secondly, the mixer in timber and the large consumption of energy, so its application is limited; third is the machine design is complex, because the spiral amplitude along the length change, to ensure that the vibration along the chamber having the same the stirring speed, the auger helix angle made changes.
Table 1 Experimental results contrast between cyclic vibratory mixer and ordinary mixer Mixing condition Mixing time Isotropy of concrete mixtures Compressive strength of concrete hardening test cube /% /% /Mpa /Mpa Vibratory mixing① 38 0.35 1.58 17.96 0.64 0.036 20% cement reduction of vibratory mixing② 38 0.34 1.52 14.62 0.60 0.042 Ordinary force action mixing③ 68 0.68 1.60 14.80 1.15 0.078 Note: ---- Relative error of concrete mixtures’ mortar density; ----Relative error of rough aggregate’s content in one unit volume; ---- Average intensity; ---- Standard deviation; ---- Dispersion coefficient Analysis of the table, fluctuation in the quality of the concrete is affected by two main factors: first, fluctuation of the quality of raw material and measurement error; second, the processes of production and technics.
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