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Online since: December 2012
Authors: Filippo Giammaria Praticò, Rosolino Vaiana, Marinella Giunta, Teresa Iuele, Antonino Moro
Conversely, PEMs have quite low bearing properties, clogging, variation of volumetrics over the time, variation of noise, texture, friction, and permeability performance over the time.
It’s important to emphasize that PEM properties vary over the time.
International literature on the use of the RAP in wearing courses remarks two key-factors which can affect the derivation of the optimal amount of RAP to add: the mineralogical selection of the RAP aggregates and the extraction technique of the RAP.
The mechanical properties of the recycled mixes were assessed in terms of Marshall stability (UNI EN 12697-34) and Brazilian test (UNI EN 12697-23) (Figure 7 and 8).
Factors Determining the Inhomogeneity of Reclaimed Asphalt Pavement and Estimation of its Components Content Variation Parameters.
Online since: April 2011
Authors: Fritz Klocke, Michael Duscha, Atilim Eser, Christoph Broeckmann, Hagen Wegner, Alexander Bezold
The change of workpiece material properties was modelled as a function of temperature and phase history.
Table 1: Grinding wheel properties.
Material Properties, Phase Transformation Parameters and FEM Model.
The corresponding material properties for the steel 100Cr6 used in this study can also be found in [16, 17].
Therefore, different gain factors for the amplifier have to be selected.
Online since: January 2012
Authors: Yu Mei Ding, Wei Min Yang, Peng Cheng Xie, Zhi Bian
In recent times, microcellular injection molding have attracted great interest due to the considerable enhancement in stiffness, and substantial improvements in mechanical, thermal, and flammability properties while realizing part weight reduction by replacing plastics with the supercritical fluid (SCF).
They showed that the supercritical fluid (SCF) level and injection speed are the most important factors affecting the shrinkage and warpage of microcellular injection molded parts.
It was anticipated that the shrinkage and warpage of the semi-crystalline PP resin would be more significant than amorphous materials, and the glass fiber reinforced PP displayed great enhancement in the mechanics properties.
Table 1 Factors and levels used in this study Factor Injection speed[mm/sec] Injection pressure[bar] Shot temperature[oC] SCF dosage [%] Mold temperature[oC] Cooling time[sec] Level 1 40 60 195 0.2 20 30 Level 2 80 120 205 0.4 40 35 Level 3 120 180 210 0.6 60 40 Table 2 Standard matrix for DOE used for microcellular injection molding No.
As for the other factors, their order of influence was as follows: A was the injection speed, B was the injection pressure, C was the shot temperature, D was the SCF level, E was the mold temperature, and F was the cooling time.
Online since: February 2012
Authors: Zong Fu Zhang, Jie Lin, Jia Chu Xu
Currently many ways are used to study the mechanical properties of nanoparticle-reinforced polymer matrix composites, and most studies obtain mechanical properties of composite materials, and analyze the effect of nanoparticle type, shape, average particle size, surface modification methods and other factors mainly through experimental research methods.
In fact between the nanoparticles and the matrix the interface layer is really existed, and the nature of the interface layer directly affects the mechanical properties of composite materials [16] [9,10].
Thus, making a reasonable mechanical model will be key to predict the effective mechanical properties of nanoparticle-reinforced polymer matrix composites.
Effective factors of the modulus of composite 1.
The Mechanical Properties of Carbon Nanotubes and Their Composites [D].
Online since: May 2015
Authors: Janette Brezinová, Anna Guzanová, Juraj Koncz, Dagmar Draganovská
The paper presents the results of research aimed at determining the corrosive properties of steel surfaces after mechanical treatment by grinding and blasting.
The data obtained by this method are further analyzed and may provide important information on the composition of the system in terms of its electrical properties.
The difference in maximum values of polarization resistance was affected by several factors such as the shape and size of used blasting medium, kinetic energy of impact and parameters of pretreatment technology.
Change in surface activity and subsequent decrease in adhesion of applied coatings significantly affects also the corrosive environment which the surfaces are exposed to.
Stejskal, Effect of surface treatment of pigment particles with polypyrrole and polyaniline phosphate on their corrosion inhibiting properties in organic coatings, Prog.
Online since: March 2014
Authors: Irza Sukmana, Siti Amirah Ishak
In the in vivo system, the formation of new blood vessels depends on the properties fibrin gel extracellular matrix.
Different concentration of fibrinogen and thrombin also affect the microstructure of the fibrin gel.
The variation of these properties will be then manipulated to be used for in vitro angiogenesis.
In this context, fibrin matrix has been widely used for the investigation of angiogenic factors involving in ECs differentiation with and without growth factors [4,5].
Kirsner, Angiogenesis in Wound Repair : Angiogenic Growth Factors and the Extracellular Matrix, Microscopy Research and Technique. 60 (2003) 107-114
Online since: October 2020
Authors: Kamila T. Shakhmurzova, Azamat A. Zhansitov, Svetlana Yu. Khashirova, Zhanna I. Kurdanova, Artur E. Baykaziev
The mechanical properties of parts obtained by the FDM method mainly depend on production parameters, such as print temperature, print speed, scan path, nozzle diameter, layer thickness, chamber temperature, and fill factor [29].
It is known that a higher or lower printing temperature, layer thickness or printing speed can lead to deformation of the sample, which directly affects the operational properties of the final product.
The authors of [37] investigated the effect of temperature, printing speed, filament layer thickness, and fill factor (Table 1) on the mechanical properties of PEEK.
Li, et al., Influence of thermal processing conditions in 3D-printing on the crystallinity and mechanical properties of PEEK material, J.
Deng, Mechanical Properties Optimization of Poly-Ether-Ether-Ketone via Fused Deposition Modeling, Materials. 11 (2018) 1-11
Online since: September 2014
Authors: Aeslina binti Abdul Kadir, Ahmad Shayuti Bin Abdul Rahim, Hidra Hasbee Bin Jamil
Physical and mechanical properties were also determined which are compressive strength, shrinkage, density and initial rate of suction.
Materials and Method Physical and Mechanical Properties Mosaic sludge waste was collected at the mosaic manufacturer in Johor.
Water content is an important factor affecting the quality of the brick, therefore compaction test was conducted to determine the optimum moisture content (OMC).
Shrinkage depends upon several factors.
These factors include the properties of the components, the proportion of the components, mixing manner, the amount of moisture, dry environment and member size.
Online since: December 2012
Authors: Hong Xiao, Mei Wu Shi, Guo Liang Dai, Li Li Liu
Their mechanical and crimp properties were got from Instron 5566.
For the same kind of polymer, the higher the apparent viscosity, the worse the flow properties.
The effect of weight ratio on the structure and crimp properties.
The effect of weight ratio on the crimp properties of PET/PTT bicomponent fiber.
On the premise of the spinnability, following conclusions could be drawn: (1)The viscosity difference between the PET component and PTT component was key factor influencing structure and crimp properties of PET/PTT bicomponent filament, followed by the composition content. (2) The crystallization of PET component with high melting temperature occurred preferentially, and the PET component bore most of the spinning tension due to its excellent mechanical properties.
Online since: September 2018
Authors: Danuta Barnat-Hunek, Nikolay Lyubomirskiy, Stanisław Fic
A difference was found in changes in the stress intensity factor (KIC) and the compressive strength (fc) of concretes depending on nature of the surface roughness of the aggregates tested.
On the macrostructure level, the cement matrix – aggregate grains connection (ITZ) can be distinguished, which is a weak place in concrete and determines its physical and mechanical properties [1,2].
The article presents research and analysis limited to the mechanical adhesion.
Samples with dimensions of 4x8x36 cm with a 3 cm gap were used to determine the stress intensity factor (KIC) (I model of cracking according to RILEM).
And also it is affected by the shape of the grain surface and the coefficient of sphericity, which affects the grains packing in concrete, and the rheology of a concrete mix.
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