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Online since: October 2006
Authors: Hyun Woo Lee, Gook Hyun Ha, Ji Hun Yu, Myung Hee Lee, Kong Hoon Lee, Seung Woo Han
The
electrical, thermal, thermoelectric and mechanical properties also obtained by the experiments.
Properties.
The mechanical properties of the materials were obtained using the nanoindentation method.
Table 1 Electrical, thermal and thermoelectric properties.
The electrical, thermal, thermoelectric and mechanical properties, which are required for FE analysis, were measured by the experiments.
Properties.
The mechanical properties of the materials were obtained using the nanoindentation method.
Table 1 Electrical, thermal and thermoelectric properties.
The electrical, thermal, thermoelectric and mechanical properties, which are required for FE analysis, were measured by the experiments.
Online since: December 2011
Authors: Anoma Thitithammawong, Charoen Nakason, Hasleena Boontawee, Azizon Kaesaman, Sopa Chewchanwuttiwong
Various parameters and properties include mixing energy, Mooney viscosity, curing, mechanical and dynamic mechanical properties of rubber compounds and vulcanizates have been investigated.
Cure properties, mooney viscosity (ASTM D 1646-94), Cross-link density (Flory–Rehner equation), mechanical properties (ASTM D 412-06) and dynamic mechanical properties (by DMA technique) were investigated.
The crucial factor of Tg is the structure of processing oil.
In the dynamic mechanical properties study, it can also consider the capability of using for industrial applications from the tested data.
Moreover, palm benzyl ester gives better mechanical properties to the rubber compound than the one with aromatic oil.
Cure properties, mooney viscosity (ASTM D 1646-94), Cross-link density (Flory–Rehner equation), mechanical properties (ASTM D 412-06) and dynamic mechanical properties (by DMA technique) were investigated.
The crucial factor of Tg is the structure of processing oil.
In the dynamic mechanical properties study, it can also consider the capability of using for industrial applications from the tested data.
Moreover, palm benzyl ester gives better mechanical properties to the rubber compound than the one with aromatic oil.
Online since: July 2015
Authors: Robert Černý, Igor Medveď, Jaromír Žumár, Iñigo Antepara
Any possible pathways for moisture within the stonework caused by architectural factors or structural damages will enhance the distribution of salts and air-pollutants and their concentration over time as well as contribute significantly to its biological colonization and further biodeterioration [5].
The former is determined by the water surface tension and adhesive forces, while the latter by the hydrostatic pressure and depends on the permeability properties of the material.
The presence of salts in buildings can be due to several factors, such as air pollution and sea spray [1], chemical reactions, primarily present in building materials, added during reconstruction or renovation of buildings, or transported by rising damp [6].
The dry-mechanical removal of efflorescence can affect the thermodynamic behaviour of salts in relation to environmental conditions and can influence the drying behaviour of the object [12].
The parameters affecting the performance of the poultice are the water source (moistening of masonry, from the poultice itself or from a partial bath), poultice composition (clay, cellulose compounds, other, or their mixtures), thickness of the layer, and environmental conditions (affect the kinetics and/or location of salt).
The former is determined by the water surface tension and adhesive forces, while the latter by the hydrostatic pressure and depends on the permeability properties of the material.
The presence of salts in buildings can be due to several factors, such as air pollution and sea spray [1], chemical reactions, primarily present in building materials, added during reconstruction or renovation of buildings, or transported by rising damp [6].
The dry-mechanical removal of efflorescence can affect the thermodynamic behaviour of salts in relation to environmental conditions and can influence the drying behaviour of the object [12].
The parameters affecting the performance of the poultice are the water source (moistening of masonry, from the poultice itself or from a partial bath), poultice composition (clay, cellulose compounds, other, or their mixtures), thickness of the layer, and environmental conditions (affect the kinetics and/or location of salt).
Online since: July 2013
Authors: Natthaphop Suwannamek, Nanjaporn Ruangpaisarn, Chureerat Prahsan
Antibacterial properties, surface area, and fiber crystalization were investigated.
The greater antibacterial properties were found at lower modified chitosan loading compared ZnO.
Chitosan is available in a wide range of molecular weights and degrees of deacetylation, which are the main factors affecting the particle size, particle formation and aggregation [3].
Modified chitosan and ZnO particle increased PP fiber antibacterial properties.
Antibacterial properties of antimicrobial-finished textile products.
The greater antibacterial properties were found at lower modified chitosan loading compared ZnO.
Chitosan is available in a wide range of molecular weights and degrees of deacetylation, which are the main factors affecting the particle size, particle formation and aggregation [3].
Modified chitosan and ZnO particle increased PP fiber antibacterial properties.
Antibacterial properties of antimicrobial-finished textile products.
Online since: October 2006
Authors: Seung Hoon Nahm, Joon Hyun Lee, Jong Yup Kim
So, it is very important to understand material defect shape and distribution, and its effect on
mechanical properties exactly.
Introduction It is very important to understand the effect of defect on fatigue properties because the practical properties of engineering materials are often determined by the defect.
In the case of casting defects, however, they are still not possible to fully account for not only the effect on the properties, but also the condition by NDT because of its complex shape and small size[3], even though several methods for predicting the mechanical strength[4~6] and characterizing the defective condition[7,8] have been proposed.
As shown in Fig. 2 and 3, the relation between fatigue properties and the square root of total defect area estimated has very good linearity in log-normal plot with about 0.8 ~ 0.9 of determination factor.
The relation between fatigue properties and maximum defect size was also shown in Fig. 4 and 5.
Introduction It is very important to understand the effect of defect on fatigue properties because the practical properties of engineering materials are often determined by the defect.
In the case of casting defects, however, they are still not possible to fully account for not only the effect on the properties, but also the condition by NDT because of its complex shape and small size[3], even though several methods for predicting the mechanical strength[4~6] and characterizing the defective condition[7,8] have been proposed.
As shown in Fig. 2 and 3, the relation between fatigue properties and the square root of total defect area estimated has very good linearity in log-normal plot with about 0.8 ~ 0.9 of determination factor.
The relation between fatigue properties and maximum defect size was also shown in Fig. 4 and 5.
Online since: January 2014
Authors: Shao Jie Liu, Qian Qian Hu, Pei Xin Li, Xiao Meng Chu
The mechanical properties, construction performance and water resistance of the mortar were improved and costs came down.
The polymer used was PS-HEMA, which achieved better mechanical properties, construction performance and water resistance to the mortar.
The factors and levels were shown in Table 2.
Said, Effect of the addition of an acrylic polymer on the mechanical properties of mortar, ACI Mater.
Benaggoun, Properties of polymer modified mortars made with blended cements, Adv.
The polymer used was PS-HEMA, which achieved better mechanical properties, construction performance and water resistance to the mortar.
The factors and levels were shown in Table 2.
Said, Effect of the addition of an acrylic polymer on the mechanical properties of mortar, ACI Mater.
Benaggoun, Properties of polymer modified mortars made with blended cements, Adv.
Online since: December 2014
Authors: Xiao Hui Xun, Yu Feng Wei, De Xin Nei
About columnar jointed basalt, Wang Yi [4], Shi Anchi [5], etc. studied the mechanical properties of this type rock, got the deformation modulus value range, all the members of the opposite sex characteristics etc.
Understand the characteristics of columnar jointed basalt intrinsic factors and the nature of reason, it's available in the columnar joints basalt, foundation surface excavation for the future of the columnar joints basalt exposure after the relaxation characteristics of performance, construction method and matters needing attention in construction research has the vital role. 3 The reason of fragmentation and deformation parameters do not match Site survey found that columnar jointed basalt has the following typical characteristics: (1) Characteristics of the medium itself Characteristics of the rock itself, the media is a key factor in determining the mechanical properties of rock and the characteristics of the medium itself can be reflected by physical indicators.
Table 3 shows the study area to collect physical and mechanical properties of basalt, we can be seen from the table, columnar jointed basalt rock of proportion, bulk density were higher than other spots Basalt oblique, almond basalt, meanwhile, on the porosity and water absorption than other rocks, these characteristics determine rock mechanical properties of the medium columnar jointed basalt rock lithology is superior to the other rocks in the study area, from the table, compressive strength, elastic modulus and other mechanical indicators have clearly reflected.
Figure 1 The characteristics 1 of columnar Figure 2 The characteristics 2 of columnar jointed basalt outcropping microcracks jointed basalt outcropping microcracks 4 Conclusions According to the results of tests and analysis shows that rock fragmentation size, is not the only factor in the decision of rock deformation resistance, mechanical properties, development and other structural characteristics of the surface structure factors also play an important influence.
Columnar jointed basalt, although the block of the rock is small, because the mechanical properties of the rock medium is good in itself, and the rigid structure of the surface in contact with rock, tightly closed, and therefore has a high deformation modulus and longitudinal wave velocity.
Understand the characteristics of columnar jointed basalt intrinsic factors and the nature of reason, it's available in the columnar joints basalt, foundation surface excavation for the future of the columnar joints basalt exposure after the relaxation characteristics of performance, construction method and matters needing attention in construction research has the vital role. 3 The reason of fragmentation and deformation parameters do not match Site survey found that columnar jointed basalt has the following typical characteristics: (1) Characteristics of the medium itself Characteristics of the rock itself, the media is a key factor in determining the mechanical properties of rock and the characteristics of the medium itself can be reflected by physical indicators.
Table 3 shows the study area to collect physical and mechanical properties of basalt, we can be seen from the table, columnar jointed basalt rock of proportion, bulk density were higher than other spots Basalt oblique, almond basalt, meanwhile, on the porosity and water absorption than other rocks, these characteristics determine rock mechanical properties of the medium columnar jointed basalt rock lithology is superior to the other rocks in the study area, from the table, compressive strength, elastic modulus and other mechanical indicators have clearly reflected.
Figure 1 The characteristics 1 of columnar Figure 2 The characteristics 2 of columnar jointed basalt outcropping microcracks jointed basalt outcropping microcracks 4 Conclusions According to the results of tests and analysis shows that rock fragmentation size, is not the only factor in the decision of rock deformation resistance, mechanical properties, development and other structural characteristics of the surface structure factors also play an important influence.
Columnar jointed basalt, although the block of the rock is small, because the mechanical properties of the rock medium is good in itself, and the rigid structure of the surface in contact with rock, tightly closed, and therefore has a high deformation modulus and longitudinal wave velocity.
Online since: January 2012
Authors: J. Cornide, Véronique Smanio, Thomas Sourmail, C. Capdevilla, Carlos Garcia-Mateo, Francisca G. Caballero
Evolution of microstructure and mechanical properties during tempering of continuously cooled bainitic steels.
Indeed, for a number of mechanical components, ferrite pearlite microstructures are no longer sufficient in terms of mechanical properties.
In the following, results are presented for three different bainitic steel grades, and the origins of the changes in mechanical properties are discussed.
Results Influence of tempering on mechanical properties.
However, this alone cannot explain the changes in mechanical properties.
Indeed, for a number of mechanical components, ferrite pearlite microstructures are no longer sufficient in terms of mechanical properties.
In the following, results are presented for three different bainitic steel grades, and the origins of the changes in mechanical properties are discussed.
Results Influence of tempering on mechanical properties.
However, this alone cannot explain the changes in mechanical properties.
Online since: August 2006
Authors: Satoru Takahashi, Yoshio Harada, Masayuki Yoshiba, Raito Kawamura
Mechanical tensile or compressive loading was applied progressively to the TBC
specimen by an axial loading mode.
Strength properties of various TBC systems under tensile or compressive loading at room temperature Figure 10 shows 0.2% proof stresses of the various TBC systems under the tensile and compressive loadings.
Discussion Affecting factors for failure behavior of TBC system under static loading From the comprehensive examination of the mechanical failure behavior under the static loading conditions for various TBC systems with different coating characteristics, the testing temperature was confirmed to become one of the most important affecting factors.
Conclusion (1) The mechanical failure behavior of TBC system depends strongly on the temperature.
[3] Mechanical Performance of Advanced Materials, Ins.
Strength properties of various TBC systems under tensile or compressive loading at room temperature Figure 10 shows 0.2% proof stresses of the various TBC systems under the tensile and compressive loadings.
Discussion Affecting factors for failure behavior of TBC system under static loading From the comprehensive examination of the mechanical failure behavior under the static loading conditions for various TBC systems with different coating characteristics, the testing temperature was confirmed to become one of the most important affecting factors.
Conclusion (1) The mechanical failure behavior of TBC system depends strongly on the temperature.
[3] Mechanical Performance of Advanced Materials, Ins.
Online since: February 2012
Authors: Kelvin K.M. Loh, Rayson H.C. Oh, Willy C.K. Tan
In addition to the tensile properties of the yarn, fabric weave structure is crucial as propagation of stress waves is affected by the weave structure.
In addition, optical light stimulation was also reported to have a slight improvement on the mechanical properties of the silk fibre.
However in some cases, an optimum value will be reached after which there will be a drop in mechanical properties.
In addition to yarn parameters playing an important role to the overall composite mechanical properties, fabric weave structure is also as important.
Stitching is another commonly used method to improve mechanical properties of weaved fabrics.
In addition, optical light stimulation was also reported to have a slight improvement on the mechanical properties of the silk fibre.
However in some cases, an optimum value will be reached after which there will be a drop in mechanical properties.
In addition to yarn parameters playing an important role to the overall composite mechanical properties, fabric weave structure is also as important.
Stitching is another commonly used method to improve mechanical properties of weaved fabrics.