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Online since: June 2010
Authors: S.L. Evans, H. Everitt, Rob Bigsby, Imran Khan, C.A. Holt
Figure 1 medial view of the pelvis
Methods:
In 3D DIC two cameras record the deformation process of a sample as it is subjected to mechanical
forces (figure 2 ).
However it has been shown that the properties of the speckled pattern, lighting conditions and measurement system effect the accuracy of the DIC measurement [14].
These factors may have introduced errors into the experimental measurements.
Raimondi, Loss in Mechanical Contact of Cementless Acetabular Prostheses Due to Post-Operative Weight Bearing: A Biomechanical Model.
Proceedings of the Institution of Mechanical Engineers, Part H: Journal of Engineering in Medicine. 220(2) (2006), p. 299-309
However it has been shown that the properties of the speckled pattern, lighting conditions and measurement system effect the accuracy of the DIC measurement [14].
These factors may have introduced errors into the experimental measurements.
Raimondi, Loss in Mechanical Contact of Cementless Acetabular Prostheses Due to Post-Operative Weight Bearing: A Biomechanical Model.
Proceedings of the Institution of Mechanical Engineers, Part H: Journal of Engineering in Medicine. 220(2) (2006), p. 299-309
Online since: August 2018
Authors: Pavel Mec, Jana Daňková, Tereza Majstríková
Natural and artificial wooden mineralization leads to mineral particles deposition which positively affects certain properties.
The evaluation of mechanical properties is rather rare [4].
The resulting values are also affected by other factors (wood density, the occurrence of early or late wood and inhomogeneity etc.).
These factors have resulted in lower values of determination coefficient especially in those cases where the curve is interleaved with a greater number of values.
Babiak, Štruktúra a vlastnosti dreva (Structure and properties of wood), PRÍRODA, Bratislava, 1997
The evaluation of mechanical properties is rather rare [4].
The resulting values are also affected by other factors (wood density, the occurrence of early or late wood and inhomogeneity etc.).
These factors have resulted in lower values of determination coefficient especially in those cases where the curve is interleaved with a greater number of values.
Babiak, Štruktúra a vlastnosti dreva (Structure and properties of wood), PRÍRODA, Bratislava, 1997
Online since: September 2011
Authors: Yu Lei Liu, Jia Guang Meng, Ning Li, Hui Qin Shan
The water-based polyurethane has the character of good flexibility, not to burn well, anticorrosive, the weathering resistance, good adhesion properties and so on.
In order to enable knitted fabric to win better wearing properties, the character of water-based polyurethane must be improved.
But the too long curing time will affect the hand feel, whiteness etc.
Here the bending length, the hand feel, the pilling and the whiteness of fabric were choired as examination factors and the relationship between them and the curing time will be discussed.
Determination of PH value PH value is one of the important factors to finishing the fabric.
In order to enable knitted fabric to win better wearing properties, the character of water-based polyurethane must be improved.
But the too long curing time will affect the hand feel, whiteness etc.
Here the bending length, the hand feel, the pilling and the whiteness of fabric were choired as examination factors and the relationship between them and the curing time will be discussed.
Determination of PH value PH value is one of the important factors to finishing the fabric.
Online since: September 2003
Authors: Gui Song Wang, X.N. Zhang, Lin Geng
Microstructure and Tensile Properties of Al Hybrid Composites
Reinforced with SiC Whiskers and SiC Nanoparticles
X.
Hybrid composites reinforced with ceramic whiskers and nanoparticles are expected to show excellent properties because the different reinforcements complemented each other in hybrid composites, especially improved some properties of singular reinforced composites[3-5].
Microstructure and properties change resulting from hot extrusion were investigated.
Tensile strength of the as extruded (SiCw+SiCp)/Al composite depends on various factors, such as whisker orientation and length, distribution and segregation of the nanoparticles, and strain 3µm (a) 3µm (b) 0.1µm (b) whisker 0.1µm (a) cluster hardening of the matrix alloy.
The segregation of the SiC nanoparticles is a decisive factor in determining the mechanical properties of the extruded composites.
Hybrid composites reinforced with ceramic whiskers and nanoparticles are expected to show excellent properties because the different reinforcements complemented each other in hybrid composites, especially improved some properties of singular reinforced composites[3-5].
Microstructure and properties change resulting from hot extrusion were investigated.
Tensile strength of the as extruded (SiCw+SiCp)/Al composite depends on various factors, such as whisker orientation and length, distribution and segregation of the nanoparticles, and strain 3µm (a) 3µm (b) 0.1µm (b) whisker 0.1µm (a) cluster hardening of the matrix alloy.
The segregation of the SiC nanoparticles is a decisive factor in determining the mechanical properties of the extruded composites.
Online since: May 2011
Authors: Jun Shen, Yu Liu, Xiao Dong Zhu
The mat moisture content (MC), panel type and density were chosen as the influencing factors to investigate the VOC emissions after processing, and consequently provide basic guideline for the selection of processing parameters of particleboards to control the pollutants. 1m3 environmental chamber and portable VOC monitor were used for VOC sampling and analysis.
The results showed that these factors had significant impact on VOC concentrations.
The level of VOC emission depends on various factors including resin type and production factors.
In order to satisfy the national standards of mechanical and physical properties of particleboards, the mat moisture content of samples were under 14% during pressing.
The VOCs concentration of particleboards was also affected by the panel type.
The results showed that these factors had significant impact on VOC concentrations.
The level of VOC emission depends on various factors including resin type and production factors.
In order to satisfy the national standards of mechanical and physical properties of particleboards, the mat moisture content of samples were under 14% during pressing.
The VOCs concentration of particleboards was also affected by the panel type.
Online since: February 2014
Authors: Jan Valíček, Marta Harničárová, Milena Kušnerová, Vojtěch Václavík, Jaromír Daxner, Tomáš Dvorský, Miroslava Bendová, Aleš Břenek
properties
Abstract.
The article presents the formulas of restoration plaster and its properties.
Fig. 1 View of closed structure of PUR foam with volume weight of 40 kg∙m-3 (scaled up 210 times) The physical and mechanical properties and the use of polyurethane foam in building industry depend on its volume weight.
Table 3 shows the mechanical and thermal and technical properties of polyurethane foam depending on volume weight.
The properties of polyurethane foam after the end of its life cycle prior to mechanical recycling are presented in Table 4.
The article presents the formulas of restoration plaster and its properties.
Fig. 1 View of closed structure of PUR foam with volume weight of 40 kg∙m-3 (scaled up 210 times) The physical and mechanical properties and the use of polyurethane foam in building industry depend on its volume weight.
Table 3 shows the mechanical and thermal and technical properties of polyurethane foam depending on volume weight.
The properties of polyurethane foam after the end of its life cycle prior to mechanical recycling are presented in Table 4.
Online since: September 2018
Authors: Charnnarong Saikaew, Phacharadit Paengchit
Cutting tool for the surface finish was mixed ceramic insert Al2O3+TiC (Tungaloy, Japan) with physical and mechanical properties as follows: transverse rupture strength of 0.9 GPa, modulus of elasticity of 400 GPa, hardness of 94 HRA, surface roughness of 0.101 µm, specific gravity of 4.35 and friction of around 0.25.
Identifying the important process factors: In this research work, there were two machining factors including cutting speeds of 150, 150, 220 m/min and feed rates of 0.06, 0.08, 0.1 mm/rev. 3.
Table 1 also shows contribution percentage of the factors and their interaction.
Analysis of variance and plots of main and interaction effects were successfully used to investigate the effects of the cutting factors and to determine an optimal operating condition of the statistically significant factors.
Both factors and their interaction were statistically significant at the level of significance of 0.05.
Identifying the important process factors: In this research work, there were two machining factors including cutting speeds of 150, 150, 220 m/min and feed rates of 0.06, 0.08, 0.1 mm/rev. 3.
Table 1 also shows contribution percentage of the factors and their interaction.
Analysis of variance and plots of main and interaction effects were successfully used to investigate the effects of the cutting factors and to determine an optimal operating condition of the statistically significant factors.
Both factors and their interaction were statistically significant at the level of significance of 0.05.
Online since: July 2015
Authors: N.M. Shaffiar, Erry Y.T. Adesta, Mohammad Riza, Amin M.F. Seder, Muataz Hazza Faizi Al Hazza
These temperatures affect the surface quality and flank wear progress.
Introduction In finishing end milling, the quality of the surface is of a significant importance and one of the important properties.
In CCD All the factors have three levels: –1, 0, and 1.
This design is easy to carry out and have the property of sequentially.
The CCD design for three factors is constructed on a cube is shown in Figure 2.
Introduction In finishing end milling, the quality of the surface is of a significant importance and one of the important properties.
In CCD All the factors have three levels: –1, 0, and 1.
This design is easy to carry out and have the property of sequentially.
The CCD design for three factors is constructed on a cube is shown in Figure 2.
Online since: May 2012
Authors: Xiao Ning Zhang, Li Jian Wang, Jun Shi, Feng Xia Chi
In order to study viscoelastic properties of asphalt mixture, an advanced Shear Rheometer is used.
It is difficult to determine directly mechanical properties of asphalt mixture in such a broad range of temperature and load, even using the most advanced equipments and instruments.
A appropriate rheological model can describe well rheological properties of asphalt mixture.
Temperature - shift factor equation.
It is considered that strain will affect viscoelastic properties of material during the process of dynamic test.
It is difficult to determine directly mechanical properties of asphalt mixture in such a broad range of temperature and load, even using the most advanced equipments and instruments.
A appropriate rheological model can describe well rheological properties of asphalt mixture.
Temperature - shift factor equation.
It is considered that strain will affect viscoelastic properties of material during the process of dynamic test.
Online since: April 2013
Authors: Zu Bin Chen, Yu Jian Du, Yang Yang, Yan Zhang
Changchun: College of Geoexploration Science and Technology, Jilin University, 2009.
].Digital geophone-based MEMS (Micro Electron mechanical System) , which not only able to achieve the miniaturization of electronic components, while the surface etching technology to take advantage of MEMS technology comes mechanical appliances the three-dimensional structure of processing, and thus achieve the purpose of the miniaturization processing of mechanical devices.
Conventional VHF technology to the 3G technology affects the development of seismic instruments in different degrees.
In accordance with the requirements of the construction process, to use the communications equipment correctly to ensure seismic instruments in a different environment to avoid the unfavorable factors of communication, improve the utilization of the instrument and the purpose of reducing the failure.
Seismic Exploration Instrument Seismic exploration instrument is the core of the seismic data acquisition system and the key technologies of the acquisition system by seismic exploration instrument to reflect, it is based on the history of generations of seismic exploration instrument development of the basic characteristics, the analysis summarized replacement generally law and decision elements, and on this basis, combined with related technology development trend, and infer the key factors that affect the future development trend of seismic data acquisition system.
Thus, without considering the difference of the geophone, the current each acquisition system collection characteristics (technical index and acquisition ability) much the same, although in use characteristics (general physical properties) on each has its advantages but with no significant difference, which is the contemporary mainstream acquisition system comprehensive characteristics.
Conventional VHF technology to the 3G technology affects the development of seismic instruments in different degrees.
In accordance with the requirements of the construction process, to use the communications equipment correctly to ensure seismic instruments in a different environment to avoid the unfavorable factors of communication, improve the utilization of the instrument and the purpose of reducing the failure.
Seismic Exploration Instrument Seismic exploration instrument is the core of the seismic data acquisition system and the key technologies of the acquisition system by seismic exploration instrument to reflect, it is based on the history of generations of seismic exploration instrument development of the basic characteristics, the analysis summarized replacement generally law and decision elements, and on this basis, combined with related technology development trend, and infer the key factors that affect the future development trend of seismic data acquisition system.
Thus, without considering the difference of the geophone, the current each acquisition system collection characteristics (technical index and acquisition ability) much the same, although in use characteristics (general physical properties) on each has its advantages but with no significant difference, which is the contemporary mainstream acquisition system comprehensive characteristics.