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Online since: July 2011
Authors: Xi Mian Ruan, Jian Jin, Qi Chen, Tao Qian, Xu Fang Yao, Yi Chen, Wei Feng
Experimental results show that the number of holes, size, shape, all affect the size of the thermal conductivity.
Now the hole technique by changing, increasing the flow a long way to increase the number of holes arranged, staggering arrangement of holes, extending heat conduction process in the pore wall, reducing the pore size of concrete and brick wall to improve the hole masonry thermal insulation properties
The hole forms directly affects the pore type block porosity. 
Therefore, in the process conditions and mechanical properties of permission, the appropriate row of holes to increase the number of hollow block, to improve the insulation capacity of hollow blocks is clearly beneficial. 2.3 Group B experiment (different hole shape experimental) 2.3.1 The relationship between the different shape of opening and the strength The major product of concrete hollow brick produced at present and past is light melted.Its patterns must be either round shape or big square hole.We make several experiments about the blocks in distinct patterns shape.Then we get the same hole section situations different holed the compressive strength, the coefficient of thermal conductivity of the section with holes in the relationship.The table below is different holed hollow blocks measured the average thermal conductivity.Units: w.
Pervious Concrete Pavement Preparation and Properties of Materials [D]. ​​
Online since: September 2010
Authors: G. Liu, W. Fan, Yin Xiao, X. Miao, Ross Crawford
Polymer microspheres loaded with bioactive particles, biomolecules, proteins, and/or growth factors play important roles in tissue engineering, drug delivery, and cell therapy.
The microstructures of microspheres control their properties, including; chemical (e.g.
Thus how to join the microspheres to achieve a porous structure with good mechanical properties and without damaging the protein is an important issue.
However, the loading and the release of the growth factors of the microspheres should be investigated in the follow-up study.
The encapsulation efficiency was ~93.8 %, which would be significant for saving the expensive growth factors.
Online since: May 2012
Authors: Zhong Ren Feng, Xiong Jiang Wang, Jian Shen
The mechanical parameters of materials are shown in Table 2.
Based on the ratio of principal stress, it can be ascertained that the correction factors of the tensile fatigue strength are 0.74, 0.74, 0.80 and the design values are 1.40MPa, 1.40MPa, 1.51MPa.
Table 2 Mechanical Parameters of Materials Concrete Steel Bar Mass Density[㎏/m3] 2400 Mass Density[㎏/m3] 7800 Young’s Modulus[N/㎡] 2.95e10 Young’s Modulus[N/㎡] 1.9e11 Poisson’s Ratio 0.2 Poisson’s Ratio 0.3 Expansion Coeff alpha 1e-5 Expansion Coeff alpha 1.35e-5 Dilation Angle[°] 30 Yield Stress[N/㎡] 2.1e8 Eccentricity 0.1 Plastic Strain 0 Fb0/fc0 1.15 K 0.6667 Fig.1 a) pylon finite element messing b) concrete stress contours c) steel bar stress contours Based on the global analysis, the more accurate elements are messed at the round of crack tips to research the cracks propagate or not.
In view of the adverse effects of tension-compression cyclic process along with temperature changing on anti-fatigue property of concrete [5], the three cracks will propagate because the maximum tension stress of the N0.1 and No.2 cracks is beyond the concrete tensile fatigue strength design value and the one of N0.3 approximates the design value[6].
The crack propagation of mass concrete is very complicated and affected by many inconclusive factors.
Online since: November 2011
Authors: Saci Messaadi, Mosbah Daamouche, Abderrahim Guittoum, Hadria Medouer, Ibtissem Zidani, Noureddine Fenineche
It is widely used in the production of new materials that require specific chemical and physical properties [1].
It has been shown [3, 4], that Ni100-xFex, (10properties that lead to widespread use of these materials in variety of applications.
Applications based on the soft magnetic properties include: read-write heads for magnetic storage, magnetic actuators and high performance transformer cores [7,8].
The growth Kinetics of three-and two dimensional (3D and 2D) clusters have been examined by many authors [9,13] and under different experimental conditions accounting for various limitation factors.
Finally, the marked reproducibility of these Ni-Fe alloys needs an extended study of other physical properties.
Online since: January 2015
Authors: Tao Lin, Jing Lei Bai, Zhi Wang
High manganese steel is widely used in various fields of actual production due to its characteristics of excellent mechanical properties and low cost of production and so on.
Considering the surface quality, hardness, wear resistance and other factors, when the content of Ti+C was 80%, the coating has the optimal performance: the average hardness was 48 HRC and the relative wear rate was 40%.
Microstructure Evolution and Wear Properties of In-situ Synthesized TiB2 and TiC Reinforced Steel Matrix Composites[J].
Effect of Process Parameters on Properties of TiC Reinforced High Manganese Steel.
Microstructure and Properties of Fe–TiC Ceramic–metal Composites[J].
Online since: May 2018
Authors: Seyedeh Mahsa Seyed Danesh, Hossein Faghihian, Shahab Shariati
The effect of principle factors affecting the dye removal efficiency including pH, contact time, the sorbent amount, ionic strength and solution volume were studied using Taguchi functional factorial design.
Optimization by orthogonal array design Taguchi method as an orthogonal fractional factorial design has been utilized to optimize the experimental factors affecting the removal efficiency [19].
This study considers five controllable factors, for four levels.
Furthermore, the magnetic properties of Fe3O4@SiO2-KIT-6-SO3H make it more efficient adsorbent for the removal of MG from aqueous solution.
Langmuir, The constitution and fundamental properties of solids and liquids.
Online since: May 2022
Authors: Iuliana Duma, Victor Verbiţchi, Ion Aurel Perianu
The thermo-mechanically affected zones have fine granulation.
A shear test on a tensile test machine, without any guide device, has been performed on the specimens T1 - T5, with the results 60.80 – 167.51 MPa, depending on the parameters and specific factors.
Around the pin, there are both the thermo-mechanical affected zone and the heat affected zone, both distinct from the weld metal.
The results of the shear test are in the range 60.80 – 167.81 MPa, depending on the parameters and factors or conditions.
This result proves the significant and positive effect of FSP on the structure and mechanical properties of the previous FSW.
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: February 2025
Authors: Mária Behúlová, Eva Babalová
Thermophysical properties of AISI 304.
Thermophysical properties of Ti Grade 2.
Design of Experiment The process of laser welding of materials is influenced by numerous factors.
Through DoE analysis, only some factors or a subset of possible combinations are examined.
Two-level factorial designs are commonly used in experiments with multiple factors, where it is essential to study the combined effects of these factors on the response [11].
Online since: September 2014
Authors: André Lazarin Gallina, Marilei de Fátima Oliveira, Paulo Rogério Pinto Rodrigues, Marcelo Grassi
After comparing results of the electrochemical evaluation of the coating proposed with the iron and zinc phosphate coatings, it was possible to see that the film formed presented better corrosion resistance properties.
The wide employment of this alloy is mainly due to the fact that it presents low cost and is easily obtained, besides presenting high mechanical resistance [1].
The addition of carbon, which might vary from 0.008 to 2.1% in mass, confers the steel mechanical resistance, and this is its main alloy element.
The corrosion is an old problem that affects several industrial sectors, involving high costs to substitute metallic parts.
Tests M1 M2 M3 1 - - + 2 + + + 3 - + + 4 + - + 5 + + - 6 - + - 7 0 0 0 8 + - - 9 - - - Factors Actual levels + - 0 M1 Concentration (mol L-1) 1 0.0001 0,01 M2 Temperature (ºC) 70 20 45 M3 Immersion time (min) 10 5 2.5 Results Experimental Planning This refers to the influence of the variables: temperature, immersion time and concentration of the SAM solution for the carbon steel treatment.
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