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Online since: May 2004
Authors: F.S. Silva
The Role of Low Temperature on Mechanical and Fatigue Properties of
Different Alloys
F.
At each temperature, mechanical properties, σy, σu, E, εr, impact energy absorption curves, and some fatigue properties such as the initiation life, Ni, total life, Nf, and propagation life, Np, as well as the shape of the propagation curve, da/dN-Kmax (Kmax maximum stress intensity factor) were assessed.
This is true for almost all mechanical and fatigue properties in different materials.
Mechanical properties are listed in table 1 and Fig. 1.
The same tendency occurs for general mechanical properties.
At each temperature, mechanical properties, σy, σu, E, εr, impact energy absorption curves, and some fatigue properties such as the initiation life, Ni, total life, Nf, and propagation life, Np, as well as the shape of the propagation curve, da/dN-Kmax (Kmax maximum stress intensity factor) were assessed.
This is true for almost all mechanical and fatigue properties in different materials.
Mechanical properties are listed in table 1 and Fig. 1.
The same tendency occurs for general mechanical properties.
Online since: May 2006
Authors: I.M. Shapiro, Rui L. Reis, Paul Ducheyne, Gabriela A. Silva, Olga P. Coutinho
When the tissue being treated is bone, properties such as bone bonding
behaviour and excellent biological performance are very desirable.
This study describes the properties of two types of starch-based microparticles: their bioactivity in vitro (when processed with Bioactive Glass 45S5), the good biological performance and also the ability to be used as controlled release vehicles of bioactive molecules, such as steroids and growth factors. 1.
A wide array of properties is desirable for bone tissue engineering applications, and if all these properties can be gathered by one material, the advantages are greatly enhanced and faster repair of the damaged tissue can occur.
Other applications for these materials include their use as carriers for cells and for bioactive agents, such as anti-inflammatory agents and growth factors [5-9].
Mechanical behavior of injection-molded starch-based polymers.
This study describes the properties of two types of starch-based microparticles: their bioactivity in vitro (when processed with Bioactive Glass 45S5), the good biological performance and also the ability to be used as controlled release vehicles of bioactive molecules, such as steroids and growth factors. 1.
A wide array of properties is desirable for bone tissue engineering applications, and if all these properties can be gathered by one material, the advantages are greatly enhanced and faster repair of the damaged tissue can occur.
Other applications for these materials include their use as carriers for cells and for bioactive agents, such as anti-inflammatory agents and growth factors [5-9].
Mechanical behavior of injection-molded starch-based polymers.
Online since: October 2013
Authors: Jian Guo Sheng, Yu Di Shan, Ping Zeng
The Experimental Results and Discussion
Effect of Modifier Concentration on the Properties of Emulsion.
The Influence of Reaction Temperature on the Properties of Emulsion.
Table 2 Effects of reaction temperature on the properties of epoxy resin emulsion Reaction temperature /°C Average particle size(μm) State Mechanical stability Freeze-thaw stability Calciumion stability 60 80 100 216 22 160 Milky white nattierblue nattierblue Layered Stable Layered 1 3 1 Instable Stable Stable The Table 2 result showed that temperature had a great influence on the reaction system.
Effects on Different Ratio of Curing Agent and the Epoxy Resin E44 to Properties of Modified Curing Agent.
Different ratio of Epoxy resin E44 and curing agent has an important affects on the molecular size and structure of modified curing agent, thus affecting emulsifying properties, water solubility and water solubility of the curing agent, as shown in Table 3.
The Influence of Reaction Temperature on the Properties of Emulsion.
Table 2 Effects of reaction temperature on the properties of epoxy resin emulsion Reaction temperature /°C Average particle size(μm) State Mechanical stability Freeze-thaw stability Calciumion stability 60 80 100 216 22 160 Milky white nattierblue nattierblue Layered Stable Layered 1 3 1 Instable Stable Stable The Table 2 result showed that temperature had a great influence on the reaction system.
Effects on Different Ratio of Curing Agent and the Epoxy Resin E44 to Properties of Modified Curing Agent.
Different ratio of Epoxy resin E44 and curing agent has an important affects on the molecular size and structure of modified curing agent, thus affecting emulsifying properties, water solubility and water solubility of the curing agent, as shown in Table 3.
Online since: May 2020
Authors: I.L. Chulkova, M.A. Raschupkina, P.P. Deryabin
The Effect of the Level of Pouring the Mixture on the Basic Properties of Aerated Concrete with Variotropic Properties
P.P.
Research Results Properties of Raw Materials.
Physical properties of siliceous components.
Therefore, for directional adjustment of the properties of gas-concrete mixtures and physico-mechanical properties of the articles quartz sand could be replaced by expanded clay sand.
In the production of small-piece aerated products of variable density and strength of the cross section one of the major technological factors affecting the basic properties of the finished material is the fill level of the mixture in the mold.
Research Results Properties of Raw Materials.
Physical properties of siliceous components.
Therefore, for directional adjustment of the properties of gas-concrete mixtures and physico-mechanical properties of the articles quartz sand could be replaced by expanded clay sand.
In the production of small-piece aerated products of variable density and strength of the cross section one of the major technological factors affecting the basic properties of the finished material is the fill level of the mixture in the mold.
Online since: August 2014
Authors: Tie Ying Li, Guan Feng Qiao, Qing Fang Niu, Wei Chao Ao
At present researches on mechanical properties of structural brackets still shallow, study its static mechanical properties, stress and failure mechanism needs further.
Dimensional numerical simulation Mechanical properties of wood.
Wood as the main timber brackets, the natural heterogeneity makes the wood physical and mechanical properties and other building materials compared to present the obvious anisotropic.
Factors tissue structure of wood a one-way distribution of wood fiber bundle-like cell timber determines the anisotropy.
Table1 Mechanical properties of Northeast China red pine Modulus of elasticity (Mpa) Modulus of shear (Mpa) Poisson's ratio E1 16272 G12 1172 μ12 0.42 E2 1103 G13 676 μ13 0.51 E3 573 G23 66 μ23 0.68 According to the mechanical properties of wood, In this paper, ABAQUS finite element software for the numerical analysis of elastic brackets stripes compression state, Table 1 shows the mechanical properties of wood input software.
Dimensional numerical simulation Mechanical properties of wood.
Wood as the main timber brackets, the natural heterogeneity makes the wood physical and mechanical properties and other building materials compared to present the obvious anisotropic.
Factors tissue structure of wood a one-way distribution of wood fiber bundle-like cell timber determines the anisotropy.
Table1 Mechanical properties of Northeast China red pine Modulus of elasticity (Mpa) Modulus of shear (Mpa) Poisson's ratio E1 16272 G12 1172 μ12 0.42 E2 1103 G13 676 μ13 0.51 E3 573 G23 66 μ23 0.68 According to the mechanical properties of wood, In this paper, ABAQUS finite element software for the numerical analysis of elastic brackets stripes compression state, Table 1 shows the mechanical properties of wood input software.
Online since: June 2006
Authors: Z. Chen, Linda Wu, Edmund Chwa
Factors towards Pencil Scratch Resistance of Protective Sol-Gel
Coatings on Polycarbonate Substrate
Edmund Chwa
1,a
, Linda Wu
2,b and Z.
It offers many advantages, including the possibility of coating large, complex shaped substrates, the ability to obtain homogeneous coatings and tailored mechanical and surface properties using inorganic-organic hybrid materials [7].
Influence of colloidal silica filler in the inorganic-organic sol-gel matrix on coating properties is studied.
Correlation between the pencil grade and these factors has been made and discussed.
Once key parameters are identified, quantitative assessment on the effect of the key factors should be performed.
It offers many advantages, including the possibility of coating large, complex shaped substrates, the ability to obtain homogeneous coatings and tailored mechanical and surface properties using inorganic-organic hybrid materials [7].
Influence of colloidal silica filler in the inorganic-organic sol-gel matrix on coating properties is studied.
Correlation between the pencil grade and these factors has been made and discussed.
Once key parameters are identified, quantitative assessment on the effect of the key factors should be performed.
Online since: October 2020
Authors: Ivan A. Podtynnikov, Alexey V. Balynin, Ilya L. Borisov, Alexey A. Yushkin, Peter M. Budd, Alexey V. Volkov
The effect of experiment time on membrane characteristics such as flux and separation factor was investigated.
The neat PIM-1 membranes showed high toluene flux of 2.45 kg/m2∙h, but low separation factor of 4.
In addition, during distillation, BTX components are released into the atmosphere, which negatively affects the environment.
PIM-1 possesses high permeability, good mechanical and film-forming properties, which allows us to fabricate both dense [6, 7] and thin film composite membranes [8-10].
In work [12], it was demonstrated that during the operation of cross-linking with aluminum chloride due to the appearance of amide bonds and carboxyl groups that associate with each other and nitrile groups of the PIM-1 polymer, the chemical resistance of the membrane to toluene is increased, and the mechanical properties of the film are improved.
The neat PIM-1 membranes showed high toluene flux of 2.45 kg/m2∙h, but low separation factor of 4.
In addition, during distillation, BTX components are released into the atmosphere, which negatively affects the environment.
PIM-1 possesses high permeability, good mechanical and film-forming properties, which allows us to fabricate both dense [6, 7] and thin film composite membranes [8-10].
In work [12], it was demonstrated that during the operation of cross-linking with aluminum chloride due to the appearance of amide bonds and carboxyl groups that associate with each other and nitrile groups of the PIM-1 polymer, the chemical resistance of the membrane to toluene is increased, and the mechanical properties of the film are improved.
Online since: February 2015
Authors: Zuo Guang Zhang, Liang Hua Xu, Ai Jun Gao
The crystallite thickness (Lc) also increases with an increasing temperature and below 2000 °C the crystallite form factor (La‖/Lc) increases rapidly.
Extensive work has been conducted to probe the relationship between the crystal structure and the mechanical properties of carbon fibers [4–7].
In the present study, carbon fibers were heat treated at various temperatures and the changes in the crystallite form factors were measured in relation to the morphology and growth models of the graphite crystallites in the carbon fibers.
La‖/La⊥ and La‖/Lc were defined as the crystallite form factors for the characteristics of the change in the geometry of the graphite crystallites in the carbon fibers.
The growth of Lc was affected by the ability of the graphite crystallites or graphite single sheets to rearrange, and increasing the crystallite size with an elevated temperature lowered the ability of the crystallites to move.
Extensive work has been conducted to probe the relationship between the crystal structure and the mechanical properties of carbon fibers [4–7].
In the present study, carbon fibers were heat treated at various temperatures and the changes in the crystallite form factors were measured in relation to the morphology and growth models of the graphite crystallites in the carbon fibers.
La‖/La⊥ and La‖/Lc were defined as the crystallite form factors for the characteristics of the change in the geometry of the graphite crystallites in the carbon fibers.
The growth of Lc was affected by the ability of the graphite crystallites or graphite single sheets to rearrange, and increasing the crystallite size with an elevated temperature lowered the ability of the crystallites to move.
Online since: December 2013
Authors: Bülent Ekmekci, Nihal Ekmekci
Introduction
Titanium and its alloys have perfect corrosion resistance, excellent mechanical properties and good compatibility with bone and not rejected by the living organisms.
They pointed out that deposition parameters alter properties and structure of PLD-HA films.
These effects have tremendous impacts on the resultant surface properties.
HA powders in dielectric liquid lead intense secondary sparking and therefore liable to transient surface properties.
The operational parameters such as pulse on duration and current are the key factors.
They pointed out that deposition parameters alter properties and structure of PLD-HA films.
These effects have tremendous impacts on the resultant surface properties.
HA powders in dielectric liquid lead intense secondary sparking and therefore liable to transient surface properties.
The operational parameters such as pulse on duration and current are the key factors.
Online since: August 2018
Authors: M. Rajaram Narayanan, S. Nallusamy, R. Suganthini Rekha
Speed of the vehicle depends on many factors like steering geometry, inflation pressure, vehicle load, road temperature and environmental conditions.
The mobility of the sand, the indentation and slip of the tyre are an important factor that affects the traction performance of off-road vehicles on sand terrain.
Nallusamy and Gautam Majumdar, Effect of stacking sequence and hybridization on mechanical properties of jute-glass fiber composites, Int.
Nallusamy, A review on the effects of casting quality, microstructure and mechanical properties of cast Al-Si-0.3Mg alloy, Int.
Nallusamy, Analysis of welding properties in FSW aluminium 6351 alloy plates added with silicon carbide particles, Int.
The mobility of the sand, the indentation and slip of the tyre are an important factor that affects the traction performance of off-road vehicles on sand terrain.
Nallusamy and Gautam Majumdar, Effect of stacking sequence and hybridization on mechanical properties of jute-glass fiber composites, Int.
Nallusamy, A review on the effects of casting quality, microstructure and mechanical properties of cast Al-Si-0.3Mg alloy, Int.
Nallusamy, Analysis of welding properties in FSW aluminium 6351 alloy plates added with silicon carbide particles, Int.