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Online since: November 2013
Authors: U. Hashim, Tijjani Adam
A study was conducted on the effect of the radial displacement of the artery wall, pressure distribution along the studied segment, the factors affecting stress in the fluid and artery wall, vorticity, etc.
Moussa, MEMS design optimization with FEA, ALGOR Center for Mechanical Design Technology White Papers, 2006
[7] The American Society of Interventional and Therapeutic Neuroradiology (ASITN), Brain aneurysms and aneurysms information, May 2009, [8] C.Gabriel, S.Gabriel and E.Corthout: The dielectric properties of biological tissues: I.
[9]S.Gabriel, R.W.Lau and C.Gabriel: The dielectric properties of biological tissues: II.
[10] S.Gabriel, R.W.Lau and C.Gabriel: The dielectric properties of biological tissues: III.
Moussa, MEMS design optimization with FEA, ALGOR Center for Mechanical Design Technology White Papers, 2006
[7] The American Society of Interventional and Therapeutic Neuroradiology (ASITN), Brain aneurysms and aneurysms information, May 2009, [8] C.Gabriel, S.Gabriel and E.Corthout: The dielectric properties of biological tissues: I.
[9]S.Gabriel, R.W.Lau and C.Gabriel: The dielectric properties of biological tissues: II.
[10] S.Gabriel, R.W.Lau and C.Gabriel: The dielectric properties of biological tissues: III.
Online since: August 2011
Authors: Zhuang Chu, Cheng Bin Li, Xiang Deng, Wei Du
Result analysis
Fig.1 The relationship between the C content and Fig.2 The state diagram of the 1Cr17Ni2
the hardness of martensite stainless steels
The influence of the C content The main factor that affects the kit hardness is the C content in martensite after being quenched.Fig.1 is the relationship between the C content and the hardness of martensite after being quenched.
And ferrite influents greatly on the mechanics character of the 1Cr17Ni2 stainless clad steel, the composition of the steel satisfies the allowed range, which affects seriously the contents of ferrite, the organization after routine hardening have 5~20% or so ferrite [3].
It’s mechanical properties are lower because Cr17 steel can not be strengthened by phase transformation,So Ni, Co, N and other austenite forming elements must be added to ensure that the microstructure is austenite at solution treatment heating and martensite after quenching.
The steel may transform phase when heating if the 2% nickel is added,so the mechanical properties of steel can be improved by phase transformation strengthening.It is Cr17Ni2 martensite-ferrite stainless steel.
The Cr17Ni2 stainless steel has high corrosion resistance and high mechanical properties[4].
And ferrite influents greatly on the mechanics character of the 1Cr17Ni2 stainless clad steel, the composition of the steel satisfies the allowed range, which affects seriously the contents of ferrite, the organization after routine hardening have 5~20% or so ferrite [3].
It’s mechanical properties are lower because Cr17 steel can not be strengthened by phase transformation,So Ni, Co, N and other austenite forming elements must be added to ensure that the microstructure is austenite at solution treatment heating and martensite after quenching.
The steel may transform phase when heating if the 2% nickel is added,so the mechanical properties of steel can be improved by phase transformation strengthening.It is Cr17Ni2 martensite-ferrite stainless steel.
The Cr17Ni2 stainless steel has high corrosion resistance and high mechanical properties[4].
Online since: March 2010
Authors: Rui Hong Zhang
Introduction
The materials made the braced pillar of vacuum plate glass may be non-rust steel, tungsten carbide
steel, chrome steel, aluminum, nickel, molybdenum, tantalum, ceramics, etc [1]. 10Ni3MnCuAl
steel belongs to low carbon medium alloy precipitation-hardening steel and has high hardenability,
fine complex mechanical properties, mirror machining property, EDM Performance, pattern
sculpturing performance and welding performance after heat treatment. 10Ni3MnCuAl steel was
adequate for producing braced pillar.
The coefficient of thermal conductivity is increased and the transparency of glass is affected when the contact area between the braced pillar and glass is oversize.
It showed that the residual stress and permanent stress of glass was the factor of reducing life period.
It showed that the residual stress and permanent stress of glass was the factor of reducing life period.
It will directly affect service life of the vacuum plate glass.
The coefficient of thermal conductivity is increased and the transparency of glass is affected when the contact area between the braced pillar and glass is oversize.
It showed that the residual stress and permanent stress of glass was the factor of reducing life period.
It showed that the residual stress and permanent stress of glass was the factor of reducing life period.
It will directly affect service life of the vacuum plate glass.
Online since: May 2014
Authors: Kensuke Kuroda, Masazumi Okido, Mansjur Zuldesmi
Surface property, especially hydrophilicity, is considered to have a strong influence on the biological reactions.
That is to say that super-hydrophilic valve metals without coating of bioactive substances had high osteoconductivity, and the surface properties strongly affected on the osteoconductivity.
Introduction There are several factors that used to select materials for different components in biomedical devices, such as: the materials must have an excellent biocompatibility, show an excellent corrosion resistance and appropriate mechanical properties (low modulus elasticity) [1].
Surface roughness and hydrophilicity are important factors of biomaterials which related with protein adsorption and cell adhesion after implantation into the body [8-11].
Surface properties especially hidrophilicity contribute strongly affect on osteoconductivity of valve metals.
That is to say that super-hydrophilic valve metals without coating of bioactive substances had high osteoconductivity, and the surface properties strongly affected on the osteoconductivity.
Introduction There are several factors that used to select materials for different components in biomedical devices, such as: the materials must have an excellent biocompatibility, show an excellent corrosion resistance and appropriate mechanical properties (low modulus elasticity) [1].
Surface roughness and hydrophilicity are important factors of biomaterials which related with protein adsorption and cell adhesion after implantation into the body [8-11].
Surface properties especially hidrophilicity contribute strongly affect on osteoconductivity of valve metals.
Online since: April 2021
Authors: Elena N. Soldatkina, Renat V. Gavariev, Ksenia N. Gavarieva
Introduction
Injection molding is a complex process that depends on many factors, such as: the material of the casting and mold, the temperature of the melt being poured, the speed and pressure of pressing, the design of the Gating system, the lubricant used and the coatings.
The properties of lubricants are most dependent on their base, which can be used as petroleum products, organosilicon polymers, vegetable and animal fats, as well as various oils and their derivatives [4].
An equally important parameter that affects the thickness of the applied layer of lubricant is the way it is applied.
To meet these requirements, the coating must have a high level of residual compressive stresses, as well as increased adhesive properties and strength characteristics.
These factors will lead to a decrease in the magnitude and amplitude of vibrations of tensile stresses in the forming parts, both in the closed and open state of the mold, which will increase the period of operation of the mold before the formation of type I cracks.
The properties of lubricants are most dependent on their base, which can be used as petroleum products, organosilicon polymers, vegetable and animal fats, as well as various oils and their derivatives [4].
An equally important parameter that affects the thickness of the applied layer of lubricant is the way it is applied.
To meet these requirements, the coating must have a high level of residual compressive stresses, as well as increased adhesive properties and strength characteristics.
These factors will lead to a decrease in the magnitude and amplitude of vibrations of tensile stresses in the forming parts, both in the closed and open state of the mold, which will increase the period of operation of the mold before the formation of type I cracks.
Online since: June 2014
Authors: Xiu Lan Sun, Yu Zhu Shang, Mao Lei, Cheng Hang
Table.2 Earthquake eluvia soil the soil physical and mechanical properties
Name
Color
thickness (m)
Gravel particles (%)
sand (%)
silt
(%)
clay (%)
ρ(g/cm3)
C
(kPa)
Φ
(°)
e
Sand clay
Red-brown
0.5-7
0.1-28.0
20.9-47.0
10.7-38.0
22-55.6
1.57-1.90
8.9-70.0
12.0-35.0
0.8-1.07
Pink clay
brown
5-15
15.0-34.0
10.0-55.0
8.0-38.0
10.5-34.0
1.63-1.78
8.9-50.0
18.6-33.0
0.72-1.13
silt
Brown spots
>10
15.0-47.0
42.3-67.0
8.0-30.2
4.0-13.0
1.66-1.93
10.0-40.0
24.0-35.0
0.63-1.04
On the grain size distribution of it in residual soil from top to bottom, with the increase of weathering degree, significantly reduce the content of clay, gravel content.Eluvia soil layers soil density from top to bottom with the reduce of void ratio increases gradually, basic is within the scope of 1.75 to 2 g/cm2, pore ratio is between 0.8 0.99 distribution, pore ratio is larger.Eluvia soil cohesion around from top to bottom with the loss of the clay content decreases, and the internal friction Angle are increased
Rainfall condition Intensity is the most commonly used at home and abroad - Duration curve, at the same time considering rainfall [2], rainfall Intensity and rainfall three rainfall factor, and more intuitive to reflect the landslide and the rainfall factor, the relationship between the domestic and foreign researchers have according to the geological conditions of different regions and meteorological conditions Intensity - Duration curve is established.
Table .3 The rainfall intensity and the instability probability Pf the data table rainfall intensity /(mm/h) Pf=50% Pf=80% t2-t1 Rainfall duration t1 /h Rainfall duration t2 /h 20 20.0 21.3 1.30 50 10.3 10.8 0.45 70 8.17 8.50 0.33 100 6.00 6.50 0.50 120 5.30 5.67 0.37 150 5.25 5.58 0.33 According to the random simulation method, considering the uncertainty of geotechnical properties [3] get the I - D with different instability probability curve.
Figure .3 The Pf I - D curve The I - D curve calculation results and data analysis: Mountainous and coastal areas more landslide potential sliding surface of the residual is located in the bottom of the residual sola, safety factor of slope stability under the condition of rainfall and the change of the pore water pressure of the potential sliding surface has the very good corresponding relationship, pore water pressure increases, the safety factor decrease.
Many factors influencing the landslide problem is complex, the main three factors is the terrain, geological and meteorological conditions of [4], this paper lay a foundation for later in-depth and comprehensive study.
Rainfall condition Intensity is the most commonly used at home and abroad - Duration curve, at the same time considering rainfall [2], rainfall Intensity and rainfall three rainfall factor, and more intuitive to reflect the landslide and the rainfall factor, the relationship between the domestic and foreign researchers have according to the geological conditions of different regions and meteorological conditions Intensity - Duration curve is established.
Table .3 The rainfall intensity and the instability probability Pf the data table rainfall intensity /(mm/h) Pf=50% Pf=80% t2-t1 Rainfall duration t1 /h Rainfall duration t2 /h 20 20.0 21.3 1.30 50 10.3 10.8 0.45 70 8.17 8.50 0.33 100 6.00 6.50 0.50 120 5.30 5.67 0.37 150 5.25 5.58 0.33 According to the random simulation method, considering the uncertainty of geotechnical properties [3] get the I - D with different instability probability curve.
Figure .3 The Pf I - D curve The I - D curve calculation results and data analysis: Mountainous and coastal areas more landslide potential sliding surface of the residual is located in the bottom of the residual sola, safety factor of slope stability under the condition of rainfall and the change of the pore water pressure of the potential sliding surface has the very good corresponding relationship, pore water pressure increases, the safety factor decrease.
Many factors influencing the landslide problem is complex, the main three factors is the terrain, geological and meteorological conditions of [4], this paper lay a foundation for later in-depth and comprehensive study.
Online since: March 2006
Authors: Mika Mäkinen, Markku Uoti
Thus all the factors which favour an equiaxed structure are useful to quality.
The product G*V is equivalent to the cooling rate ( •T ), which dictates the scale of solidification morphology; finer columnar structures in castings are noticed to yield superior mechanical properties compared to coarser ones, notably with respect to tensile strength and ductility.
Theory and Results The mechanical and physical properties of cast metal products are significantly influenced by the solidification structures of the metal.
Generally these segregations worsen the physical and chemical properties of materials and they should be kept as low as possible.
When the air gap has formed, the situation depends on other factors like how fast the remelted melt will solidify and what is the melt temperature.
The product G*V is equivalent to the cooling rate ( •T ), which dictates the scale of solidification morphology; finer columnar structures in castings are noticed to yield superior mechanical properties compared to coarser ones, notably with respect to tensile strength and ductility.
Theory and Results The mechanical and physical properties of cast metal products are significantly influenced by the solidification structures of the metal.
Generally these segregations worsen the physical and chemical properties of materials and they should be kept as low as possible.
When the air gap has formed, the situation depends on other factors like how fast the remelted melt will solidify and what is the melt temperature.
Online since: July 2017
Authors: Erich Neubauer, Michael Kitzmantel, Isabel Montealegre-Meléndez, Cristina M. Arévalo, Enrique Ariza Galván
The effects of B4C phases and applied processing conditions, on the microstructure and properties of TMCs, are investigated.
Moreover, results of densification, mechanical properties and hardness measurements help to identify the most suitable processing conditions to produce this kind of TMCs.
Mechanical properties were studied; the measure of the densification of the composites by Archimedes’ method (ASTM C373-14) was set to density determination.
Imai, Influence of carbon reinforcements on the mechanical properties of Ti composites via powder metallurgy and hot extrusion, Materials Science Forum. (2013) 40-43
Ward-Close, Titanium Particulate Metal Matrix Composites–Reinforcement, Production Methods, and Mechanical Properties, Advanced Engineering Materials. 2 (2000) 85-91
Moreover, results of densification, mechanical properties and hardness measurements help to identify the most suitable processing conditions to produce this kind of TMCs.
Mechanical properties were studied; the measure of the densification of the composites by Archimedes’ method (ASTM C373-14) was set to density determination.
Imai, Influence of carbon reinforcements on the mechanical properties of Ti composites via powder metallurgy and hot extrusion, Materials Science Forum. (2013) 40-43
Ward-Close, Titanium Particulate Metal Matrix Composites–Reinforcement, Production Methods, and Mechanical Properties, Advanced Engineering Materials. 2 (2000) 85-91
Online since: August 2006
Authors: Crispin Doyle, Janice M. Dulieu-Barton, S. Quinn
This forms a flat flexible patch in which the fibre is protected
from mechanical and environmental damage.
However, it is important that the mechanical strength of the patch is not achieved at the expense of good strain transfer characteristics.
Equation (1) implies that the reflected wavelength λΒ is affected by any variation in the physical or mechanical properties of the grating region.
However, although commercial uptake of the technology is increasing, it has been limited by a number of factors including cost, which is falling but still tends to be higher than that of electrical resistance strain gauges (RSG), perceived novelty and complexity, and the difficulty of handling fragile optical fibres.
RSG readings corrected for apparent strain due to temperature and temperature-related change in gauge factor.
However, it is important that the mechanical strength of the patch is not achieved at the expense of good strain transfer characteristics.
Equation (1) implies that the reflected wavelength λΒ is affected by any variation in the physical or mechanical properties of the grating region.
However, although commercial uptake of the technology is increasing, it has been limited by a number of factors including cost, which is falling but still tends to be higher than that of electrical resistance strain gauges (RSG), perceived novelty and complexity, and the difficulty of handling fragile optical fibres.
RSG readings corrected for apparent strain due to temperature and temperature-related change in gauge factor.
Online since: May 2024
Authors: Othmane Noureddine, Afaf Chakir, Mohammed Alami, Mohammed Assouag, Fahed Elamarty
This reduction in density may be linked to several factors.
The improvement in mechanical properties can be attributed to the presence of CaCO3, a stiff and rigid material.
Nielsen, Mechanical Properties of Polymers and Composites, Second Edition.
Thonglor, “Thermal and Mechanical Properties of Modified CaCO3 /PP Nanocomposites,” vol. 6, no. 8, 2012
Fikri, “The effect of CaCO 3 filler component on mechanical properties of polypropylene,” IOP Conf.
The improvement in mechanical properties can be attributed to the presence of CaCO3, a stiff and rigid material.
Nielsen, Mechanical Properties of Polymers and Composites, Second Edition.
Thonglor, “Thermal and Mechanical Properties of Modified CaCO3 /PP Nanocomposites,” vol. 6, no. 8, 2012
Fikri, “The effect of CaCO 3 filler component on mechanical properties of polypropylene,” IOP Conf.