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Online since: July 2014
Authors: N. Dinesh, Selvaraj Venkatram, Sohil Thomas, Muthukumarasamy Maheshwaran, B. Vijaya Ramnath, K. Venkataraman
As the engine is closed, the air cooling of the engine is affected, so a radiator is fixed to cool the engine.
The anchoring properties of Auxetic fibers would tend to lock the fibers into the matrix when debonding has occurred, leading to enhanced fiber-pullout resistance.
These characteristic materials display properties such as improved strength, acoustic behavior, improved fracture toughness, superior energy absorption, damping improvement, and indentation resistance.
These properties shows that auxetic fiber can be used for airbag manufacturing as it possess high tear strength.
Golias, “Overview of critical risk factors in Power-Two-Wheeler safety”.
The anchoring properties of Auxetic fibers would tend to lock the fibers into the matrix when debonding has occurred, leading to enhanced fiber-pullout resistance.
These characteristic materials display properties such as improved strength, acoustic behavior, improved fracture toughness, superior energy absorption, damping improvement, and indentation resistance.
These properties shows that auxetic fiber can be used for airbag manufacturing as it possess high tear strength.
Golias, “Overview of critical risk factors in Power-Two-Wheeler safety”.
Online since: July 2015
Authors: Ismail bin Bakar, Nursyahidah binti Saedon, Nurul Farhana bt Mohd Seth, Adnan bin Zainorabidin
These two main factors may be based on the characteristics of the soil itself.
This study is focused on its physical properties and shrinkage measurement.
There are two main factors poses as a challenge to engineers when they deal with this type of soil [1].
The content of peat soils differs from locations due to the factors such as temperature and degree of humification.
Mechanical Properties of Peat.
This study is focused on its physical properties and shrinkage measurement.
There are two main factors poses as a challenge to engineers when they deal with this type of soil [1].
The content of peat soils differs from locations due to the factors such as temperature and degree of humification.
Mechanical Properties of Peat.
Online since: May 2012
Authors: He Ting Zhou
Experimental Research on Reinforcing Effect of Spiral Steel Fiber
Heting Zhou1,a
1Zhejiang Industry Polytechnic College, Shaoxing Zhejiang Province, China
aheting.zhou@163.com
Keywords: Spiral Steel Fibers, Bond Strength, Mechanical Anchorage Force
Abstract.
Meanwhile, steel fibers will strengthen the fatigue property and durability of a structure.
Thus, intensifying the bond strength between steel fibers and their concrete matrix is a major factor in improving the reinforcing nature of steel fibers.
And it is supposed that the physical form of steel fibers will significantly affect their bond strength with the concrete matrix.
All of these demonstrate that the helical-effect of the spiral steel fiber has greatly facilitated its bond strength with cement mortar, that is, the mechanical anchorage has been strengthened.
Meanwhile, steel fibers will strengthen the fatigue property and durability of a structure.
Thus, intensifying the bond strength between steel fibers and their concrete matrix is a major factor in improving the reinforcing nature of steel fibers.
And it is supposed that the physical form of steel fibers will significantly affect their bond strength with the concrete matrix.
All of these demonstrate that the helical-effect of the spiral steel fiber has greatly facilitated its bond strength with cement mortar, that is, the mechanical anchorage has been strengthened.
Online since: November 2011
Authors: Khaled M. Ibrahim, Yasser Fouad, Brando Okolo
Although these results, and those reported elsewhere [10, 11] provide essential information about how ECAP processing affect key engineering properties of AZ series Mg alloys, none has focused on the wear behavior of the processed alloy.
Several factors such as pressure, temperature, sliding speed and chemical composition of the mating surfaces can define the outcome of wear events in a decisive way.
The goal of the heat treatment was to further improve on the mechanical properties (strength, hardness and some ductility) of the processed material via ageing techniques, i.e. inducing the precipitation of constituents held in the solid solution.
Rai and Pathak [13], discussed that wear mechanism in Ni-Cr-Mo-V steel is defined by three distinct factors dominant at the low sliding velocity and high sliding velocity.
Conclusion Clearly ECAP processing of magnesium AZ80 leads to improved wear properties in this alloy.
Several factors such as pressure, temperature, sliding speed and chemical composition of the mating surfaces can define the outcome of wear events in a decisive way.
The goal of the heat treatment was to further improve on the mechanical properties (strength, hardness and some ductility) of the processed material via ageing techniques, i.e. inducing the precipitation of constituents held in the solid solution.
Rai and Pathak [13], discussed that wear mechanism in Ni-Cr-Mo-V steel is defined by three distinct factors dominant at the low sliding velocity and high sliding velocity.
Conclusion Clearly ECAP processing of magnesium AZ80 leads to improved wear properties in this alloy.
Online since: October 2007
Authors: Michael Ferry, O. Al-Buhamad, M. Zakaria Quadir
UFG Al alloys are possible candidate materials for use
in structural, automotive and aerospace applications due to a range of attractive properties such low
density combined with high strength.
By utilizing both SPD and the pinning effects of fine particles, it is possible to generate a hybrid microstructure containing both high strength zones and more ductile zones by exploiting the properties of different Al alloys.
The effect of solute atoms might be a significant factor affecting the deformation microstructure since scandium has strong dislocation dragging capability that reduces mobility and generates additional dislocations to sustain deformation.
By controlling the relative thickness of the Al and Al(Sc) layers, as well as the annealing conditions, it is possible to generate a microstructure exhibiting a unique combination of mechanical properties [11].
By controlling both the relative thickness of the Al and Al(Sc) layers and annealing conditions, it is possible to generate a microstructure with a unique combination of mechanical properties such as high strength and reasonable ductility.
By utilizing both SPD and the pinning effects of fine particles, it is possible to generate a hybrid microstructure containing both high strength zones and more ductile zones by exploiting the properties of different Al alloys.
The effect of solute atoms might be a significant factor affecting the deformation microstructure since scandium has strong dislocation dragging capability that reduces mobility and generates additional dislocations to sustain deformation.
By controlling the relative thickness of the Al and Al(Sc) layers, as well as the annealing conditions, it is possible to generate a microstructure exhibiting a unique combination of mechanical properties [11].
By controlling both the relative thickness of the Al and Al(Sc) layers and annealing conditions, it is possible to generate a microstructure with a unique combination of mechanical properties such as high strength and reasonable ductility.
Online since: March 2011
Authors: Hui Guang Bian, Chuan Sheng Wang, Rui Qin Wang, Zhen Zhen Wang, Jun Ling Zhang
Introduction
In the rubber mixing process, there are many factors affecting the efficiency and the quality of mixing rubber, among which mixing temperature is one of the most important factors which decided mixer performance, productivity and quality of mixing.Studying the internal mixer chamber temperature distribution and the changes of rubber temperature with time in the mixing process, is an important part of the mixer mixing theory, which has an important significance in studying how to avoid scorching, optimization of mixing conditions, how to improve the rotor and the cooling structure of mixer chamber , how to increase the rotor speed, how to improve quality and productivity of mixing rubber.This paper simulates the 3-D temperature field of internal mixer chamber using the finite element analysis software ---ADINA.
1 Modeling
1.1 Physical model
In this paper, the physical model of the synchronization rectangular rotor X (S) M - 1. 7Y mixer is established in working condition
(8) Where, Nu is Nusselt number,whose size reflects the strength of convective heat transfer;;Re is Reynolds number, whose size reflects the affect the fluid state on the heat transfer; Pr is Prandtl authorized number ,whose size reflects the affect material properties on heat transfer.
/ = 7. 475 <10, so this is a short heat transfer pipe, the flow in channel is not yet fully developed, inner layer of the laminar flow is very thin, and the heat resistance is weak,; the heat transfer coefficient calculated according to Formula (9) is too small and need correction, and the correction factor is 1.28.
Then: <20, therefore, it is also belong to the short-channel heat transfer, its heat transfer coefficient also need correction, correction factor is 1.13.
According to the principle of heat balance, the heat generated in the mixing process can be expressed as type (12), said: = 3600 (12) Where: is the heat generated in the mixing process, kJ / h; 3600 is the mechanical equivalent of heat, ; is the motor power, ; is the transfer efficiency, 0.6 ~ 0.7.
(8) Where, Nu is Nusselt number,whose size reflects the strength of convective heat transfer;;Re is Reynolds number, whose size reflects the affect the fluid state on the heat transfer; Pr is Prandtl authorized number ,whose size reflects the affect material properties on heat transfer.
/ = 7. 475 <10, so this is a short heat transfer pipe, the flow in channel is not yet fully developed, inner layer of the laminar flow is very thin, and the heat resistance is weak,; the heat transfer coefficient calculated according to Formula (9) is too small and need correction, and the correction factor is 1.28.
Then: <20, therefore, it is also belong to the short-channel heat transfer, its heat transfer coefficient also need correction, correction factor is 1.13.
According to the principle of heat balance, the heat generated in the mixing process can be expressed as type (12), said: = 3600 (12) Where: is the heat generated in the mixing process, kJ / h; 3600 is the mechanical equivalent of heat, ; is the motor power, ; is the transfer efficiency, 0.6 ~ 0.7.
Online since: February 2011
Authors: Hong Mei Zhao, Dan Su, Zhi Mei Shao, Hong Gang Li
The shearer drum is the operation mechanism, its design will directly affect the coal mining machine's life and the enterprise economic effectiveness. physical and mechanical properties diversity of coal lead to the drum design diversity drum ,the drum design must follow the "tailored" design principle.
For each cylinder in the helix angle, lead, inside and outside diameter, the intercept and installation of components gap shape cutter are the same, the different components of that gap on the location of cutter; the difference between different drum roller intercept, both inside and outside diameter of the leaf and the side plate shape and other factors.
Based on the principle of functional design from the perspective of the analysis of the drum, combined with product appearance, function groups, manufacturing and many other factors on the drum break it down, combined, will eventually be divided into a series of roller base module, the module by the matrix shown in Fig.3 shows, the drum exploded basic modules.
There are a lot of different drum the same factors, only difference is that size, size, position and direction.
Mechanical design and manufacturing,202(12) ,(2007) [4] Hongmei Zhao.
For each cylinder in the helix angle, lead, inside and outside diameter, the intercept and installation of components gap shape cutter are the same, the different components of that gap on the location of cutter; the difference between different drum roller intercept, both inside and outside diameter of the leaf and the side plate shape and other factors.
Based on the principle of functional design from the perspective of the analysis of the drum, combined with product appearance, function groups, manufacturing and many other factors on the drum break it down, combined, will eventually be divided into a series of roller base module, the module by the matrix shown in Fig.3 shows, the drum exploded basic modules.
There are a lot of different drum the same factors, only difference is that size, size, position and direction.
Mechanical design and manufacturing,202(12) ,(2007) [4] Hongmei Zhao.
Fabrication and Growth Mechanism of Nanoleaf Sodium Titanate Coating on High-Purity Titanium Surface
Online since: August 2018
Authors: Akiyoshi Osaka, Yan Fu Yan, Ya Ming Wang, Zhi Lu, Guang Xin Wang, Shuai Dong Guo, Shun Lan Deng, Yong Fa Song
Due to desirable characteristics of mechanical properties and biocompatibility, Ti and its alloys are widely used as implants embedded in the human body [2].
The surface morphology, energy, roughness, surface hydrophilicity, surface chemical composition and surface wettability of implant are considered as the main factors that affect the biocompatibility of implants [4].
The factors that affect the biocompatibility of implant include the surface morphology, surface roughness, chemical composition and wettability of the implant surface [17].
Zhang, Effects of growth substrate on the morphologies of TiO2 hierarchical nanoarrays and their optical and photocatalytic properties, Journal of Materials Science Materials in Electronics. 27 (2016) 2103-2107
Effects of Ce on microstructure and properties of Mg-2Zn-0.4Zr-xCe biomedical magnesium alloys, Transations of Materials and Heat Treatment,2016,(10):96-101
The surface morphology, energy, roughness, surface hydrophilicity, surface chemical composition and surface wettability of implant are considered as the main factors that affect the biocompatibility of implants [4].
The factors that affect the biocompatibility of implant include the surface morphology, surface roughness, chemical composition and wettability of the implant surface [17].
Zhang, Effects of growth substrate on the morphologies of TiO2 hierarchical nanoarrays and their optical and photocatalytic properties, Journal of Materials Science Materials in Electronics. 27 (2016) 2103-2107
Effects of Ce on microstructure and properties of Mg-2Zn-0.4Zr-xCe biomedical magnesium alloys, Transations of Materials and Heat Treatment,2016,(10):96-101
Online since: June 2013
Authors: Daniel Covatariu, Nicolae Ţăranu, Ionut Ovidiu Toma, Mihai Budescu, Irina Lungu
The weak masonry (made from bricks and bounded with low-strength mortars) were created using mortars which, depending on different external factors, were degraded and there are necessary urgent rehabilitation interventions in order to assure the masonry’s durability by protecting the joints with new, compatible and reversible materials and techniques (according to Venice charter requirements).
It is important to understand that the life span as well as the environmental factors such as: water and freeze-thaw cycles, differential settlements accompanied occasionally by extraordinary actions including earthquakes and windstorms, produce permanent deteriorations on masonry buildings, imposing remedial actions, restoration or reconstruction.
Therefore the current concept of sustainable construction should include the idea of reversibility caused by the daily changes, resulting from the emerging of new technologies and material properties that are becoming more efficient.
In addition to the above mentioned factors the amount of water used in mixtures that can interact with the compounds of the degraded structure should be considered.
The failure modes of the reinforced joint masonry differs from those observed on the control specimens, namely with vertically developed cracks near the joint reinforced area, with a less affected central area.
It is important to understand that the life span as well as the environmental factors such as: water and freeze-thaw cycles, differential settlements accompanied occasionally by extraordinary actions including earthquakes and windstorms, produce permanent deteriorations on masonry buildings, imposing remedial actions, restoration or reconstruction.
Therefore the current concept of sustainable construction should include the idea of reversibility caused by the daily changes, resulting from the emerging of new technologies and material properties that are becoming more efficient.
In addition to the above mentioned factors the amount of water used in mixtures that can interact with the compounds of the degraded structure should be considered.
The failure modes of the reinforced joint masonry differs from those observed on the control specimens, namely with vertically developed cracks near the joint reinforced area, with a less affected central area.
Online since: December 2011
Authors: Yu Ding Zhu, Li Ming Shen, Jian Jun Hou, Jie Song
Overall performance is generally determined by three properties: comfort, support and durability. [1] Foam is always used as a component in a composite system, serves as the “bridge” material that can tailor itself to supplement the other materials like spring and fiber.
Table1 Factors level table of foam sample Factors levels Foam types Foam combinations 1 ①latex foam A(50mm) 2 ②ordinary foam B(20+30mm) Experiment mattresses are comprised of pocket spring layer, foam layer and composite fabrics layer.
In the physical properties of mattress, peak pressure and average pressure can reflect the firmness of mattress. [4] So, they are important indicators of mattress comfort.
The choice of mattress foams is very important to the design of mattress, and it directly affects the body pressure distribution properties of the mattress and human comfort.
China Mechanical Engineering.1997, 08(01) in Chinese
Table1 Factors level table of foam sample Factors levels Foam types Foam combinations 1 ①latex foam A(50mm) 2 ②ordinary foam B(20+30mm) Experiment mattresses are comprised of pocket spring layer, foam layer and composite fabrics layer.
In the physical properties of mattress, peak pressure and average pressure can reflect the firmness of mattress. [4] So, they are important indicators of mattress comfort.
The choice of mattress foams is very important to the design of mattress, and it directly affects the body pressure distribution properties of the mattress and human comfort.
China Mechanical Engineering.1997, 08(01) in Chinese