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Online since: September 2012
Authors: Wei Min Wang
Discussion on the effect factors of the conductivity performance of PEO-based polymer electrolyte Wei-Min Wang Department of Preparatory Courses, Shenyang Institute of Engineering, Shenyang 110136, China Keywords: effect factors; PEO; conductivity; electrolyte Abstract.
Organic plasticizer, not only relates to consider the influence of the electrolyte conductivity, but also pay attention to the impact of the plasticizer on the other properties of the electrolyte.
Needs to be emphasized is that the plasticizer has a softening effect, the affect of the amount of electrolyte mechanical properties, use can not be too much to prevent the decline of mechanical properties of the electrolyte.
In addition, nano-inorganic particles can be well dispersed and transfer stress significantly improved mechanical properties.
McLachlan and Landauer, who, on the basis of the Bruggemann theory, the development of effective medium theory and the general effective medium equation, a wider range of applications of the theory, not only can be used to describe the conductive properties of the composite polymer electrolyte can also be used analysis of magnetic properties and thermal conductivity of non-conductive.
Online since: June 2012
Authors: Holmer Savastano, J.A. Rodrigues, S.F. Santos, G.H.D. Tonoli, A.E.F.S. Almeida
Potential Use of Colloidal Silica in Cement Based Composites: Evaluation of the Mechanical Properties S.F.
The properties of cement based composites depend not only on the properties of their individual components but also on their interfacial characteristics and transition zone between fiber and matrix.
These reactions are related to a number of factors such as particle size and dispersion, chemical composition, morphology and mineralogy, crystallinity, temperature and presence of activators, among others.
The colloidal state of subdivision consists of particles with a size sufficiently small (≤ 1 µm) not to be affected by gravitational forces but sufficiently large (≥ 1 nm) to show marked deviations from the properties of true solutions.
The content of colloidal silica affected the mechanical behavior of the fiber-cement.
Online since: October 2011
Authors: Lin Chang Miao, Fei Wang, Jin Hu Song
Most subsea tunnel routes are located under poor environmental conditions that are characterized by such factors as major fault zones and high water pressure.
The relative hydraulic conductivity of the hazardous-ground zone (kh/kg; simply the relative hydraulic conductivity in this paper) and the distance between the tunnel face and the hazardous zone (dh) are assumed as the major factors affecting the seepage force[2].
Material Properties.
Table 1 Material properties used in the numerical analysis γ (kN/m3) Void ratio E (Mpa) C (kPa) φ’ (°) K (m/s) Ground 19.6 0.9 50 25 20 1e-7 Hazardous zone 19.6 0.9 50 25 20 1e-4 Lining 25 / 20000 / / 1e-10 Analysis Results and Discussions Effects of the Hazardous Zone on the Pore Water Pressure Distribution.
This study is a fully coupled hydro-mechanical analysis.
Online since: September 2020
Authors: Wei Feng, Xian Shuai Chen, Jin Yang Zhang, Xiao Zhang
The mechanical properties of porous scaffold can be optimized and greatly improved by adding a solid layer with a suitable thickness.
Furthermore, the mechanical properties of the porous structure should be guaranteed for load-bearing and stress conduction.
However, few reports have clarified the true effect of porous structures in terms of mechanical properties.
This paper aimed to clarify the effect of internal and external porous design on static mechanical properties and how they affected structure response and the way of stress conduction, so as to guide the optimum design of porous scaffold.
Analysis of factors influencing bone ingrowth into three-dimensional printed porous metal scaffolds: A review, Journal of Alloys and Compounds, 2017, 717:271-285
Online since: February 2024
Authors: Aydin Nassehi, Suchandrima Das, Chanawee Promaue
Understanding the mechanical properties of parts intended for MEX printing is crucial before starting the process.
Tensile test parameters, including strain rate, notably influence measured mechanical properties.
This can be attributed to two main factors.
The influence of printing parameters on selected mechanical properties of FDM/FFF 3D-printed parts.
Reducing print time while minimizing loss in mechanical properties in consumer FDM parts.
Online since: July 2014
Authors: Pavel Chelyshkov, Artem Sedov, Ekaterina Kulikova, Andrey Volkov
Buildings are a crucial part of our daily life, on average people spends 85 % of their time performing activities inside of buildings and therefore the quality of the indoor environment is a critical factor affecting the happiness and productivity of building users.The indoor environmental quality has a strong relationship on the thermal conditions of a space which is directly affected by the amount of heat lost or gained due to the properties of the materials used, the external environmental conditions and the inner sources of heat; In consequence, efforts have to be made to maintain proper thermal conditions by means of using natural and mechanical strategies to provide heating, cooling and ventilation.
The level of comfort depends on several personal and environment factors.
The six main factors that define thermal comfort are the following: Personal Factors · Metabolic rate.
Rate of transformation of chemical energy into heat and mechanical work inside the body
Environment Factors · Air temperature.
Online since: March 2013
Authors: Xue Juan Zhang, Liu Yong, Xu Feng
The main factors affecting the quality of electrolytic grinding The quality of electrolytic grinding is mainly determined by two factors: surface roughness and the shape and position errors.
The main factors affection the surface roughness is: (1) the electrolysis factors, which include operating voltage, current density, electrolyte and so on. (2) mechanical factors, which include particle size and hardness of the abrasive, grinding pressure and so on.
Material properties of work piece, machine tool precision and machining parameters also affect the surface roughness factors.
Establishment head parameter model shown in Figure 3; Figure 3 Head parametric model Step 2: Set the material properties of the work piece model.
Conclusion For electrolytic grinding, the main factors affect the quality is the grinding force.
Online since: October 2013
Authors: Jian Zhong Zhu, Jian Biao Chen, Chun Yan Yang, Zhi Fang Zhu
In addition, the main affecting factors were also analyzed on the properties of the biological ceramsite.
As shown in Fig.1, the weighing of each factor had significant difference, and the analysis of the results disclosed that the affecting factors of the density, the piled density, the apparent density and the void fraction were the expanded perlite, magnetic powder, cement (and magnetic powder), sodium bicarbonate, respectively.
Fig. 1 The relations between the levels of factors and the value of k Effect of magnetic powder on the properties of ceramsite.
Effect of cement on the properties of ceramsite.
The result analysis found the affecting factors of the density, the piled density, the apparent density and the void fraction were the expanded perlite, magnetic powder, cement (and magnetic powder), sodium bicarbonate, respectively.
Online since: November 2013
Authors: Mohammad Fadhirul Ahmad, Noor Leha Abdul Rahman, Nor Amalina Nordin
The purpose of this study is to investigate on mechanical properties of binderless boards from kenaf fiber.
Kenaf has been actively cultivated in previous years at some of the country like Indonesia, Philippine and Vietnam due to several factors.
As a reference, MDF board from commercial was test for to evaluate its mechanical properties.
Summary In short, it can be concluded that mechanical properties of binderless boards from kenaf fiber will affected by the pressure and temperature applied during fabrication process.
This will increased the mechanical properties of binderless board from kenaf fiber.
Online since: September 2013
Authors: Gui Fan Zhao, Ke Qing, Zhen Zhang, Hong Yuan Xiao
The factors relation to the longitudinal sliding friction coefficient of sedan braking are numerous,and the affects of each factor are complex.This paper selects speed, load,tire pressure,road surface properties,road conditions,through orthogonal experiment,getting the influence degree of each factor.Regarding to the large range of sedan speed,studying the relationship between the friction coefficient and the speed,and getting the influence trend.
Orthogonal experiment According to the above analysis,this paper selects five common factors: speed,load,tire pressure,road surface properties,road conditions,designing orthogonal experiment,choosing Orthogonal table .The various factors and the corresponding level in the test are shown in table 1.The equipment is MBK-01 (III) portable brake performance tester.The equipment is capable of recording the initial braking speed, the mean braking deceleration, braking distance, and other parameters.In accordance with the orthogonal test requirement,experimental procedure shown in Figure 1.
Tab.1 The various factors and the corresponding level Factors Letter Degree Number Speed A 40km/h 1 50km/h 2 60km/h 3 Load B 70km/h 4 80km/h 90km/h Two people Three people Four people Five people 5 6 1 2 3 4 Tire C Normal 1 Overpressure(120%) 2 Road surface properties D Cement 1 Asphalt 2 Road conditions E Dry 1 Wet 2 Fig. 1 Experimental procedure Counting the experimental data,eliminating the error data,the final experimental data is summarized in Table 2 .Using the range analysis method, the influence degree of each factor in the experiment is shown in the table 3.
According to the range analysis,the influence degree of the factors involved in the experiment in descending order is:road conditions,speed, load,road surface properties,tire pressure.This plays an important part in reasonably selecting the relevant parameters to reconstruct the accident according to the scene of the accident.
[6] VeithAG.A Review of Important Factors Affecting Treadwear.Rubber Chemist and Technology, 1992,65(3):601一658 [7] Walters MH.Uneven Wear of Vehicle Tires.Tire Science And Technology,1993,21(4):202一219
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