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Online since: April 2014
Authors: Qi Zhong Huang, Kai Yang, Xian Tang, Rong Hu, Zhi Yong Xie
The effects of resin carbon content and subsequent heat-treatment process parameters on the properties of carbon paper were studied.
The results show that: the resin carbon content is an important factor to affect the density, thickness, through-plane resistivity and porosity of carbon paper.
A problem may be faced that resin is difficult to disperse to form continuous matrix on the carbon fiber surface during the impregnation molding process, which significantly decreases the properties of carbon paper.
In order to obtain carbon paper with more excellent comprehensive properties, many studies on carbon paper modification research have been conducted.
[7] Yang J B, Ling L C, Liu L, et al, Preparation and properties of phenolic resin-based activated carbon spheres with controlled pore size distribution, Carbon. 40(2002)911-916
The results show that: the resin carbon content is an important factor to affect the density, thickness, through-plane resistivity and porosity of carbon paper.
A problem may be faced that resin is difficult to disperse to form continuous matrix on the carbon fiber surface during the impregnation molding process, which significantly decreases the properties of carbon paper.
In order to obtain carbon paper with more excellent comprehensive properties, many studies on carbon paper modification research have been conducted.
[7] Yang J B, Ling L C, Liu L, et al, Preparation and properties of phenolic resin-based activated carbon spheres with controlled pore size distribution, Carbon. 40(2002)911-916
Online since: February 2017
Authors: Dong Won Jung
The influences of some factors on the forming length decisively have been analyzed and the sensitivity of these factors has been considered.
Table 1 shows the mechanical properties of the three kinds of materials used in this simulation.
The factors are shown on the table.3.
There are three factors with 3 levels considered in this paper.
The factors are same with simulation 3.
Table 1 shows the mechanical properties of the three kinds of materials used in this simulation.
The factors are shown on the table.3.
There are three factors with 3 levels considered in this paper.
The factors are same with simulation 3.
Online since: January 2006
Authors: Cheng Chan Lo, Min Jou
One of the
key factors which will alter the capacitance is the surface roughness of the plate.
It characterizes the short-range properties of the surface.
Pressure will not affect the stability of the waves, but it does affect the amplification factor iβ by means of changing σ
When 1affect the amplification
factor iβ .
Conf. on Properties and Applications of Dielectric Materials, Vol. 2 (1997), p. 697-700
It characterizes the short-range properties of the surface.
Pressure will not affect the stability of the waves, but it does affect the amplification factor iβ by means of changing σ
When 1
Conf. on Properties and Applications of Dielectric Materials, Vol. 2 (1997), p. 697-700
Online since: January 2006
Authors: Xiang Yong Guo, Feng Xing, Fa Guang Leng, Ren Yu Zhang
From the development of HVFAC, application technology of HVFAC is largely advanced by two
main factors which one is the building dam technology of RCC and other is increasingly popularized
about water-reducers, especially superplasticizer in 1970s.
Reference [7] results have shown that low quality fly ash concrete may develop same mechanical property with ordinary concrete in reinforcement bending structure, and the common workability of concrete and steel reinforce bar is not affected by low quality fly ash.
Though carbonation resistance is related to many factors, it is one of important factor for carbonation using up Ca(OH)2.
Properties Improving Through many studying results and application have shown that the properties of HVFAC is used enough in structural concrete, some inadequate properties of HVFAC is obvious.
[9] Lin Jiaping.et al: Study on Physical and Mechanical Properties of Roller Compacted Concrete with Fly Ash for High Way Use , International Symposium on New Development in Concrete Science and Technology,Nanjing Publishing of Southeast University, 1995, pp.499-506
Reference [7] results have shown that low quality fly ash concrete may develop same mechanical property with ordinary concrete in reinforcement bending structure, and the common workability of concrete and steel reinforce bar is not affected by low quality fly ash.
Though carbonation resistance is related to many factors, it is one of important factor for carbonation using up Ca(OH)2.
Properties Improving Through many studying results and application have shown that the properties of HVFAC is used enough in structural concrete, some inadequate properties of HVFAC is obvious.
[9] Lin Jiaping.et al: Study on Physical and Mechanical Properties of Roller Compacted Concrete with Fly Ash for High Way Use , International Symposium on New Development in Concrete Science and Technology,Nanjing Publishing of Southeast University, 1995, pp.499-506
Online since: March 2013
Authors: Peng Gao, Guo Xin Zhang, Ze Zhong Zhang, Zhong Xia Yuan, Nai Wang
So, with the influence of the long-term vehicle loads and many other factors, engineering properties of the compacted loess roadbed are changes gradually, finally causes the deformation and destruction of roadbed.
Based on the focus of various specific problems, the key factors of vehicle dynamic load affecting the dynamic stress of subgrade should be emphatically considered.
Because of different mechanical properties of different pavements, different models in the light of actual situation are established to discuss the mechanical properties, as shown in figure 14-16.
The main affect factors of compacted loess subgrade destruction are subgrade degree of compaction, moisture content and dynamic driving load. 2.
Influence of Compactness and Water Content on Mechanical Properties of Compacted Loess[J].
Based on the focus of various specific problems, the key factors of vehicle dynamic load affecting the dynamic stress of subgrade should be emphatically considered.
Because of different mechanical properties of different pavements, different models in the light of actual situation are established to discuss the mechanical properties, as shown in figure 14-16.
The main affect factors of compacted loess subgrade destruction are subgrade degree of compaction, moisture content and dynamic driving load. 2.
Influence of Compactness and Water Content on Mechanical Properties of Compacted Loess[J].
Online since: May 2014
Authors: Aaron F. Cipriano, Christopher Miller, Hui Nan Liu
Magnesium (Mg)-based alloys have attracted great interest as metallic biomaterials for orthopedic applications due to their biocompatibility, biodegradability, and mechanical properties that resemble those of cortical bone.
Both Zn and Ca play critical roles in bone formation and growth, and have been shown to increase mechanical and corrosion properties of Mg alloys.
Previous in vitro and in vivo studies showed that Mg-based alloys improved mechanical and degradation properties for biomedical applications as compared with pure Mg [5-7].
The cause for surface nanoscale porosity in Mg alloys has been attributed to factors including solidification shrinkage, grain size, cooling rate and gas dissolution [15].
Ma, et al., Influence of rapid solidification on the mechanical properties of Mg-Zn-Ce-Ag magnesium alloy, Mater.
Both Zn and Ca play critical roles in bone formation and growth, and have been shown to increase mechanical and corrosion properties of Mg alloys.
Previous in vitro and in vivo studies showed that Mg-based alloys improved mechanical and degradation properties for biomedical applications as compared with pure Mg [5-7].
The cause for surface nanoscale porosity in Mg alloys has been attributed to factors including solidification shrinkage, grain size, cooling rate and gas dissolution [15].
Ma, et al., Influence of rapid solidification on the mechanical properties of Mg-Zn-Ce-Ag magnesium alloy, Mater.
Online since: November 2014
Authors: Ramli Mat, Asmadi Ali, Mohamad Awang, Anwar Johari, Rosli Mohd Yunus
Rheological factor such as shear rate during membrane fabrication process has an effect on properties, structures and performance of membranes.
During those years, the effect of rheological factors such as shear rate on membrane development attracted less attention in membrane research study.
Rheological factor such as shear rate would affect morphology, physical properties and separation performance of an asymmetric membrane.
Employing different shear rates has affected the surface layer and sub-layer structure of the membranes and subsequently affected its properties and separation performance.
Gu, Effect of shear rate within spinneret on morphology, separation performance and mechanical properties of ultrafiltration polyethersulfone hollow fiber membranes, Chemical Engineering Science. 55 (2000) 1077-1091
During those years, the effect of rheological factors such as shear rate on membrane development attracted less attention in membrane research study.
Rheological factor such as shear rate would affect morphology, physical properties and separation performance of an asymmetric membrane.
Employing different shear rates has affected the surface layer and sub-layer structure of the membranes and subsequently affected its properties and separation performance.
Gu, Effect of shear rate within spinneret on morphology, separation performance and mechanical properties of ultrafiltration polyethersulfone hollow fiber membranes, Chemical Engineering Science. 55 (2000) 1077-1091
Online since: January 2016
Authors: Muhammad Bahrul Ulum, Januarti Jaya Ekaputri, Triwulan Triwulan, Priyo Suprobo, Ratni Nurwidayati
The physical, chemical and mechanical properties of geopolymer are strongly influenced by the properties of raw material such as fly ash [1, 2].
The percentage of reactive silica (SiO2) was the most important factor in chemical properties of fly ash.
The physical and chemical properties of fly ash were studied related to mechanical properties to find out the reactivity of fly ash.
So that soluble fly ash has significant effect to mechanical properties of geopolymer rather than cement paste.
[2] Diaz, E.I.; Allouche, E.N.; Eklund, S., "Factors affecting the suitability of fly ash as source material for geopolymers," Fuel, vol. 89, p. 992–996, 2010
The percentage of reactive silica (SiO2) was the most important factor in chemical properties of fly ash.
The physical and chemical properties of fly ash were studied related to mechanical properties to find out the reactivity of fly ash.
So that soluble fly ash has significant effect to mechanical properties of geopolymer rather than cement paste.
[2] Diaz, E.I.; Allouche, E.N.; Eklund, S., "Factors affecting the suitability of fly ash as source material for geopolymers," Fuel, vol. 89, p. 992–996, 2010
Online since: October 2017
Authors: Ritesh Joshi, Gopal Zinzala, Nishit Nirmal, Kishan Fuse
The parameters affecting EDM significantly are peak current, peak voltage, Ton, Toff, electrode material, dielectric etc.
The chemical composition of Ti-6Al-4V(wt%) include: Ti,89.64; Al,6.08; V,4.02; Fe,0.22; O2,0.18; others,0.04 and mechanical properties are shown in Table 1.
Mechanical properties of Ti-6Al-4V Hardness (HRC) 36 Melting temperature (°C) 1649 ± 15 Density (g/cm3) 4.42 Elastic modulus (GPa) 114 Tensile strength (MPa) 897 Thermal conductivity (W/m k) 7.2 Electrical resistivity (μΩ·cm) 178 Table 2.
- From the grey relational analysis, it is reveal that peak current is most prominent factor affecting EDM of Ti-6Al-4V.
- ANOVA results of grey grade reveals that peak current is prominent factor affecting EDM.
The chemical composition of Ti-6Al-4V(wt%) include: Ti,89.64; Al,6.08; V,4.02; Fe,0.22; O2,0.18; others,0.04 and mechanical properties are shown in Table 1.
Mechanical properties of Ti-6Al-4V Hardness (HRC) 36 Melting temperature (°C) 1649 ± 15 Density (g/cm3) 4.42 Elastic modulus (GPa) 114 Tensile strength (MPa) 897 Thermal conductivity (W/m k) 7.2 Electrical resistivity (μΩ·cm) 178 Table 2.
- From the grey relational analysis, it is reveal that peak current is most prominent factor affecting EDM of Ti-6Al-4V.
- ANOVA results of grey grade reveals that peak current is prominent factor affecting EDM.
Online since: September 2013
Authors: Giovanna Concu, Barbara de Nicolo, Nicoletta Trulli, Monica Valdés, Massimo Fragiacomo
In Italy timber and wood products are becoming increasingly used for building constructions due to their excellent physics and mechanical properties.
Physical and morphological properties (density, knots, clusters knot, resin pockets, deviation of the grain, annual ring width position of board respect to the pith, humidity, etc.) along with mechanical and non destructive properties (elastic modulus, tensile strength, sonic pulse velocity) have been checked.
Regression analysis Timber’s strength can be predicted by measurements of properties that have a clear effect on strength itself, or, on those measurable properties that do not directly affect strength but are good indicators of it.
Structural timber: determination of characteristic values of mechanical properties and density. (2010)
Determination of some physical and mechanical properties. (2010)
Physical and morphological properties (density, knots, clusters knot, resin pockets, deviation of the grain, annual ring width position of board respect to the pith, humidity, etc.) along with mechanical and non destructive properties (elastic modulus, tensile strength, sonic pulse velocity) have been checked.
Regression analysis Timber’s strength can be predicted by measurements of properties that have a clear effect on strength itself, or, on those measurable properties that do not directly affect strength but are good indicators of it.
Structural timber: determination of characteristic values of mechanical properties and density. (2010)
Determination of some physical and mechanical properties. (2010)