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Online since: May 2016
Authors: Saman Firoozi, Amir Amani, Mohammad Ali Derakhshan, Hossein Ghanbari
Diameter has an important role in determining mechanical, electrical, optical and biomedical properties of fibers [4].
Several parameters affect physicochemical properties of electrospun nanofibers.
But our results showed that flow rate is not affecting the size notably, which is probably a result of both mechanisms mentioned above.
Clark, Factors affecting the stability of nanoemulsions—use of artificial neural networks, Pharm.
Rivin, Electrospun fiber mats: transport properties, AlChE J., 45 (1999) 190-195
Online since: August 2013
Authors: Worasak Phetwarotai, Duangdao Aht-Ong
Furthermore, the blend films with MDI gave higher mechanical properties than those with PLA-g-MA at all compositions.
Several properties of PLA are attractive to usage for replacing the commodity plastics [1, 2].
It might be implied that the presence of compatibilizer resulting in the defective lamellae of the ternary blend films, affecting to the reducing of thermal stability.
These results were in agreement with the tensile properties of the blends.
Fig. 2 SEM micrographs of the fracture surface of nucleated PLA/PBAT/TPS ternary blend films (a - c) without MDI and (d - f) with 7 wt% MDI Summary Conclusively, in this work, there are two factors affecting to the properties of the ternary blends which were compatibilizer type and TPS content.
Online since: August 2013
Authors: Sheng Jie Liu, Qing Long You
Introduction With the rapid development of the logistics industry, multi-axis overloadinged vehicles has significantly increased, while it posed a serious effcet on the mechanical properties of the asphalt pavement[1-3].
Asphalt pavements are subjected to a variety of loading conditions increasing in both magnitude and quantity over the years, which are the principle factors contributing to a premature stress related failures before the life span of the mixture[5-6].
Since asphaltic-pavement is a complex structure consisting of a number of materials with different properties, perfect mathematical description of the structure may not be possible.
Table 1 Mechanical properties and the thicknesses of the pavement layers flexible asphalt pavement semi-rigid base asphalt pavement Material Thickness (cm) ElasticModulus (Mpa) Material Thickness (cm) ElasticModulus (Mpa) SMA13 4 1400 SMA13 4 1400 AC20 6 1300 AC20 6 1300 AC25 8 1200 AC25 8 1200 ATB25 18 1000 LFSG 38 1500 GA 30 250 LFSG 20 1500 Subgrade 35 Subgrade 35 As to the overloading vehicle,the tire role in the ground on the pavement area and ground radius has changed, but the vehicle tire spacing fixed structure will not change, so in the analysis, the two-wheeled double circle uniformly distributed load, loadthe circle center distance is three times the standard load earth radius, the axle load, the tire pressure and the radius of the ground contact area and the stage, such as in Table 2.
Pavement structural layer under traffic loads, each deformation overall reflect a certain extent can react pavement mechanical properties of each structural layer and Road grassroots,the observational surveys and theoretical analysis show that the permanent deformation of the semi-rigid base pavement surface accounts for more than 90% of the rutted road surface deflection values need to control.Changes in deflection of the of two pavement structure different overloadinged case.
Online since: September 2015
Authors: Balasubramanian Ravisankar, S. Kumaran, Ganesh Varma Jampana, S. Ramesh Kumar, Kondaiah Gudimetla
Physical and mechanical properties such as density and hardness are studied.
Hence for the determination of crystallite size all these factors have to be included.
This indicates that the increase in hardness is due to grain refinment and ECAP consolidation does not affect the grain refinment obtained due to mechanical alloying.
Combination of suitable flash annealing with ECAP or varying the back pressure will definitely fetch a 100% dense product without much affecting the properties obtained due to severe straining.
Densification and properties are almost same in the compacts processed in Route A and Route BC.
Online since: November 2015
Authors: Joanna Julia Sokołowska, K.G. Tonet, Jane Proszek Gorninski
These composites display excellent mechanical properties but need to be adapted to control the combustibility properties.
This restriction is explained by the fact that the fire risk of structures are linked to factors such as the amount and type of flammable materials used during the construction.
This interaction accounts for the improved mechanical performance of PC while also affecting porosity, a property which directly impacts on durability and flame resistance, the main focus of this study.
Furthermore, the material porosity is one of the factors which influences in the temperature evolution as well as in the fire spread.
Study on the influence of isophtalic and ortophtalic polymer resins and fly ash concentration on PC mechanical properties and durability.
Online since: July 2013
Authors: Zhen Lin Lu, Xiao Feng Xu, Xiao Jie Rao
The results show that the species and amount of pore forming agent are the primary influencing factors for the microstructures and properties of porous molybdenum.
Sodium chloride affects largest on the porosity of porous molybdenum.
These factors cause the highest porosity, lowest compressive fracture strength and shortest permeable time of porous molybdenum.
The properties of porous molybdenum are in an intermediate state when ammonium chloride is used as pore forming agent.
Davis, Shu Zhen, Review metallic foams: their production, properties and applications, J.
Online since: June 2025
Authors: Li Jun Han, Guo Jun Li, Zhi Guo Sun, Qing Dong Lang, Guan Lei
The copper alloy (CA) electrode cap (EC) is the most important factor that affects the quality and cost of welding.
The Cr in the Cr-Zr CA and Zn in the galvanized plate react chemically, affecting the welding quality and electrode cap life.
The compositions and mechanical properties of the plates were listed in Tables 1~3.
Mechanical properties of TL4225 and CR440Y780T Mechanical property yield strength/MPa breaking strength/MPa Hardness/ HV Elongation/% (A80) TL 4225 1200 1475 400-520 ≥5% The ECs Three materials used are Cr-Zr, Al2O3, and RE CAs.
The conductivity is influenced by various factors, including microstructures, grain sizes and conclusions.
Online since: May 2012
Authors: Ya Jun Zhao, Li Li He, Ying Gao
Effect of Admixed Recycled Aggregate on Properties of Recycled Concrete Yajun Zhao 1,a, Ying Gao 1 , Lili He 1 1College of Civil Engineering, Hebei University of Engineering, Handan 056038, China azhaoyajun_79@126.com Keywords: Recycled aggregate; Recycled concrete; Mix proportion; Orthogonal design.
Test plan and contents Workability test of RA instead of natural aggregate Consideration of 4 factors, water-cement ratio, sand ratio, fine aggregate, contents of Recycled coarse, fine aggregates instead of natural aggregate, each factor has 3 levels, using L9 ( 44) orthogonal table, it is shown in Table 1.
It indicates that when the water-cement ratio is less, the flow ability and strength can be improved greatly with the water reducing agent adding, but it would be reduced in the end with the water reducing agent adding too much for affecting the bond force of the cement hydrate and postpone growth of the strength.
(2) The water-cement ratio and water reducing agent is the major factors which affect the compressive strength of concrete
[3] R Sir Ravindrarajah,C T Tam.Properties of Concrete Made with Crushed Conrete as Coarse Aggregate[J].Magazine of Concrete Research,1985(3):29-38
Online since: August 2009
Authors: Qing Ming Zhang, Zhi Peng Du, Yu Wang, Li Yang
Therefore, the ship composite armor structures have good mechanical properties and are very suitable for ship structure protection from underwater explosion.
The key factors related to the dynamic characteristics of ship composite armor structures were also discussed.
(a) EFP formation and penetration into the composite armor structures (b) Experimental results Fig. 5 Simulation results and comparing with the experimental results Main factors affecting the impact resistance.
The damage response of ship composite armor structures to contact underwater explosion is a complicated function of many factors.
One of the important parameters affecting the response is the initial size of the composite armor structures, such as the thickness of the outer steel and the water layer.
Online since: October 2009
Authors: David H. StJohn, Mark Easton, Lisa Sweet
Alloy factors affecting hot tearing are also discussed.
There has also been progress on other alloy factors that affect the hot tearing resistance of alloys.
Schematic of the important factors affecting hot tearing.
Hence, there are other factors that affect the hot tear susceptibility of alloys other than freezing range but it is clear that small amounts of low melting point phases are detrimental to the hot tearing resistance of alloys.
Nie, J.F., Zhang, X. and Couper, M.J. (2004) The effect of Ti Content on the Mechanical Properties of an Al7Si0.35Mg Alloy, Materials Forum, 28: 12221228
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