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Online since: September 2016
Authors: Zheng Qu Feng, Lu Wang, Wei Ze Wang, Cheng Zhou Chen, Kai Di Cheng
Ceramic materials, such as WC-Co coating, have been paid more attention for its superior properties of high-temperature resistance, corrosion resistance, wear resistance, and high hardness [1, 3].
The presence of Cl- could affect the corrosion resistance of the WC-Co coating [7].
Atmosphere and temperature could affect the wear behavior of the WC-Co coating [8].
The corrosion is the controlling factor for the coating to peel off rather than the effect of mechanical loads.
The residual sand would affect the bonding strength of coatings.
Online since: October 2012
Authors: Mohd Hasbullah Idris, Ali Ourdjini, Tuti Yasmin Alias, Ahmad Zuraida
Ceramic slurry rheology behavior and stability depends on both binder and refractory materials properties.
Microstructure, mechanical, rheological properties of starch based binders depend on the processing technique and conditions of starch.
Other contribution factors are volume fraction of starch to plasticizer and shear force applied.
Inconsistent ceramic thickness produce different in temperature gradient that affect solidification rate in casting process [1].
Sopyan, Porous ceramics with controllable properties prepared by protein foaming-consolidation method, J.
Online since: December 2012
Authors: Te Li Su, Shu Wen Wang
Furthermore, full factorial experiment needs more time for result, and it is not easy to control all factors.
Provided a major effect size is large, it has greater influence over the system than other factors do.
Controllable factors chosen in the experiment and their levels are as shown in Table 1.
On the contrary, both the ratio for controllable A and B is rather significant, and so such factor is as significant factors.
Su, Study on an optimal design of mechanical properties for PP/PET nonwovens, Fibres Text.
Online since: July 2014
Authors: Hong Yan Wang, Chao Hou, Kai Zhang, Shu Bin Tian, Wen Sheng Xiao, Jian Liu
The material of casing hanger is 35CrMo, and the material properties are shown in Table 1.
Name Yield strength σs(MPa) Elastic modulus E(GPa) Poisson's ratio μ Density ρ(kg/m3) 35CrMo 835 206 0.3 7.85×103 Fig. 1 The geometric model Table 1 Material properties Meshing.
Fig. 4 Maximum radial displacements of Flow-by with different diameters The Value of V depends on and affects the casing hanger running speed, annular space pressure between high pressure wellhead and casing hanger also affects the value.
(2) Where: v0: the running speed of casing hanger; k0: scale factor; v: speed of seawater passing through the flow-by.
We have made the analysis focus on the influence of the strength of casing hanger which is affected by flow-by in oil production.
Online since: January 2012
Authors: Yong Jie Yang, Xian Xian Lin, Dong Hua Lv
Slip resistance of footwear sole affects the comfort and safety of shoes directly, and slip resistance is mainly expressed by the coefficient of friction.
For example, the shoes that the electrician wears in industry, the shoes used in climbing requires some slip properties to improve safety.
At present, the slip-resistance research from abroad sums up mainly concentrates in two aspects, such as the effect factors of anti-slip performance and the estimation of shoes’ anti-slip performance standard[3].
The research of sole slip-resistance performance in domestic mainly concentrates in the influence factors of anti-slip performance, the influence to sole slip-resistance performance about sole material, pattern and path, all the measurement to coefficient of sole friction is preliminary discussion and experiment[5].
Before testing, calibrate the system to avoid the error that is brought by mechanical or sensor linearity.After calibration, the formulae of pressure-tmp is as Eq.(2): tmp=X*L-Z . (2) Where L is tension value before calibrate,X is coefficient of calibration,Z is difference.
Online since: February 2007
Authors: He Ping Zhou, Liang Qiao, Wen Hui Duan, Ke Pi Chen, Bing Lin Gu, Xiao Wen Zhang
A degree of [001] texture (Lotgering factor ~ 0.38) was obtained by heteroepitaxial growth of oriented single PMN-PT on the SrTiO3 template particles.
However, single crystals are relatively expensive and compositional heterogeneity in grown single crystals adversely affects properties [3].
Textured ceramics are expected to provide improved properties with lower processing costs [4].
Degrees of orientation were evaluated in terms of the Lotgering's factor, )1/()( 0 0 pppf −−= , where ∑ ∑= )()00( / hkl h IIp for {100} oriented textures and )0(0 == fpP for randomly oriented polycrystals [8].
A degree of [001] texture (Lotgering factor ~0.38) was obtained by heteroepitaxial growth of oriented single PMN-PT on the SrTiO3 template particles.
Online since: August 2014
Authors: Katarina Monkova, Slavomir Hric
The optimal setting of the production process is a crucial factor that affects the quality, cost and productivity of injection moulding.
Production can be optimized by changing and modifying the following factors:[3,4,5] - The phase of the dosing can be optimized by adjusting of screw speed and back pressure
The study of these factors helps to prevent the geometric errors.
Optimization of the size and the length of the retaining pressure is a convenient way to optimize these factors.
[10] Pasko, J. et al.: Influence of technological parameters of die castning on qualitative properties of castings, In: Manufacturing engineering and technology, no. 1, (2010), p. 3-6.
Online since: July 2014
Authors: Shao Hong Xu, Zheng Zhou Wang
However, the particle size of the commonly used MP products is at the micro scale, and the addition of MP into polymers usually deteriorates mechanical properties of the filled polymers.
In hydrothermal or solvothermal synthesis, there are many factors affecting crystal growth and morphology, such as characteristics of reactants and reaction conditions [10,11].
Online since: February 2012
Authors: Karl Roll, Tobias Kleeh, Marion Merklein
The forming properties of preformed body panels for hemming operations are improved as a result.
In the area affected by the laser heat treatment, a softening occurs.
To separate the mechanical and thermal effects on the hardness, micro-hardness measurements on the untreated material were completed.
Reducing the hem radius is an important factor in the automotive industry.
The heat treatment also affects the roll in/out behaviour of the specimen.
Online since: November 2015
Authors: Jin Yang, Fa Zhou Wang, Yun Peng Liu
Raw materials and experiments 2.1 Raw materials (1) Cement: Portland cement (PC) was used with the physical and mechanical properties listed in Table 1.
Table 2 Mix proportion with EPS and SAP [kg/m3] Item Volume fraction/ % PC W Spherical particle Pure-Cem EPS-12 EPS-24 EPS-36 SAP-12 0 12 24 36 12 1619 1425 1231 1036 1425 486 428 369 311 428 0 2.2 4.3 6.5 125 SAP-24 SAP-36 24 36 1231 1036 369 311 250 374 (2) Mechanical and ultrasonic transmission properties The mechanical properties were tested with a TYE-3000 machine under the loading rate of 3kN/s.
The ultrasonic transmission properties were tested with a ZBL-U510 nonmetal ultrasonic detector
Results and discussions 3.1 Mechanical properties After desorption of SAP in the concrete, pores were left.
Desorption behavior would happen under series of factors in the cement paste, such as ions and humidity [8].
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