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Online since: December 2010
Authors: Lin Zhu, Ji Yun Li
And the effects of workpiece speed, ultrasonic amplitude and grain size on surface roughness were researched by using single-factor testing way.
Introduction Titanium alloy is widely used in various fields because of its fine physicochemical properties.
However, surface roughness, which is one of the important indexes in surface processing quality, is a key factor for fatigue strength, contact stiffness, corrosion properties and complexation properties [2].
The effects of workpiece speed, ultrasonic amplitude and grain size on surface roughness are researched by using single-factor testing way.
Fig. 2 Effect of workpiece speed on surface roughness (amplitude: A=12μm) According to the Fig. 2, we can know that the surface roughness does not change significantly with the increasing of workpiece speed in common lapping whether using W28 grinding paste or W7 grinding paste, the reason is that the increasing of workpiece speed is essentially that time variable is introduced to material deformation removal process, therefore the changes of workpiece speed mainly affect the physical and mechanical properties of machined surface[4], however, it exercises a very little influence on the geometric properties [5].
Introduction Titanium alloy is widely used in various fields because of its fine physicochemical properties.
However, surface roughness, which is one of the important indexes in surface processing quality, is a key factor for fatigue strength, contact stiffness, corrosion properties and complexation properties [2].
The effects of workpiece speed, ultrasonic amplitude and grain size on surface roughness are researched by using single-factor testing way.
Fig. 2 Effect of workpiece speed on surface roughness (amplitude: A=12μm) According to the Fig. 2, we can know that the surface roughness does not change significantly with the increasing of workpiece speed in common lapping whether using W28 grinding paste or W7 grinding paste, the reason is that the increasing of workpiece speed is essentially that time variable is introduced to material deformation removal process, therefore the changes of workpiece speed mainly affect the physical and mechanical properties of machined surface[4], however, it exercises a very little influence on the geometric properties [5].
Online since: December 2024
Authors: Hai Tao Wang, Yi Yang, Yu Zhang, Yue Xin, Ying Zhou
Influencing factors and level design.
There are great differences under different influencing factors.
(2) The primary and secondary order of factors affecting the compressive strength of iron tailings-fly ash base geopolymers is: curing temperature> iron tailings content> liquid-solid ratio.
Fresh properties, mechanical strength and microstructure of fly ash geopolymer paste reinforced with sawdust[J].
Experimental Study on Effect of Freeze-Thaw Cycle on Mechanical Properties of Recycled Concrete[D].
There are great differences under different influencing factors.
(2) The primary and secondary order of factors affecting the compressive strength of iron tailings-fly ash base geopolymers is: curing temperature> iron tailings content> liquid-solid ratio.
Fresh properties, mechanical strength and microstructure of fly ash geopolymer paste reinforced with sawdust[J].
Experimental Study on Effect of Freeze-Thaw Cycle on Mechanical Properties of Recycled Concrete[D].
Online since: March 2006
Authors: Xia Ting Feng, Cong Xin Chen, Cai Hua Liu
A test apparatus was developed to study shear-flow coupling properties for a marble
fracture with sand.
The hydraulic properties of rock fractures are affected by many factors, such as normal and shear stresses, normal and shear displacements and geometrical parameters of fracture surfaces.
The results revealed that both shear stress and displacement applied on a fracture with sand can produce influence on hydromechanical properties.
There are great differences between shear-flow coupling properties of a rough fracture and those of a fracture with sand.
Development of a shear-flow test apparatus and determination of coupled properties for a single rock joint.
The hydraulic properties of rock fractures are affected by many factors, such as normal and shear stresses, normal and shear displacements and geometrical parameters of fracture surfaces.
The results revealed that both shear stress and displacement applied on a fracture with sand can produce influence on hydromechanical properties.
There are great differences between shear-flow coupling properties of a rough fracture and those of a fracture with sand.
Development of a shear-flow test apparatus and determination of coupled properties for a single rock joint.
Online since: January 2012
Authors: Yang Zhi Chen, Hua Ping Yao, Huang Ping
Analysis on Dynamic Lubrication Characteristics of Gas Film in Hard Disk System
Hua-ping Yao1, Huang Ping2, Yang-zhi Chen2,a
1School of Mechanical and Electrical Engineering, Zhongkai University of Agriculture and Engineering, Guangzhou 510640, China,
2School of Mechanical Engineering, South China University of Technology,
Guangzhou 510640, China,
ameyzchen@scut.edu.cn
Keywords: Lubrication characteristics, gas film, magnetic slider, dynamic response curve
Abstract.
Consequently, the fluctuation in up-and-down direction is the main factor of affecting the dynamic lubrication function.
Flight characteristic of head becomes an important factor that can affects memory property of hard disk driver.
Consequently, the fluctuation in up-and-down direction is the main factor of affecting the dynamic lubrication function.
The result shows the oscillation of slider in up-and-down direction have a larger effect on the film lubrication function, and consequently, the fluctuation in up-and-down direction is the main factor to affect the dynamic lubrication function.
Consequently, the fluctuation in up-and-down direction is the main factor of affecting the dynamic lubrication function.
Flight characteristic of head becomes an important factor that can affects memory property of hard disk driver.
Consequently, the fluctuation in up-and-down direction is the main factor of affecting the dynamic lubrication function.
The result shows the oscillation of slider in up-and-down direction have a larger effect on the film lubrication function, and consequently, the fluctuation in up-and-down direction is the main factor to affect the dynamic lubrication function.
Online since: August 2019
Authors: Olga I. Tarasova, Yuriy V. Yurkin, V.V. Avdonin
Effect of Heavy Filler on Dynamic Mechanical Properties of Polymer Composites
O.I.
Experimental studies on the effect of frequency and temperature on the dynamic mechanical properties of filled composites are studied poorly and require further research.
Fillers have a great influence on the properties of compositions; the assessment of their impact is a particularly important factor.
It is stated that the type of filler affects the damping properties.
Sweeney.An Introduction to the Mechanical Properties of Solid Polymers, Wiley, 2004
Experimental studies on the effect of frequency and temperature on the dynamic mechanical properties of filled composites are studied poorly and require further research.
Fillers have a great influence on the properties of compositions; the assessment of their impact is a particularly important factor.
It is stated that the type of filler affects the damping properties.
Sweeney.An Introduction to the Mechanical Properties of Solid Polymers, Wiley, 2004
Online since: July 2022
Authors: Jun Ma, Xian Yan Zhou, Togeir Welo
The critical factor to achieve high dimensional accuracy is reducing the through-thickness gradients on both the profile bottom and sidewall.
The gap opening GA, as shown in Fig. 1(b), is applied to characterize the springback levels, the deviation of which mainly results from two factors, the large sidewall angle θ1 and the bottom angle θ2.
Uniaxial tensile tests were conducted to investigate the mechanical properties of the as-received materials.
The mechanical properties of carbon steel were employed to simulate the elastic deformation of the shim block.
Paulsen, A new mechanical calibration strategy for U-channel extrusions, Int.
The gap opening GA, as shown in Fig. 1(b), is applied to characterize the springback levels, the deviation of which mainly results from two factors, the large sidewall angle θ1 and the bottom angle θ2.
Uniaxial tensile tests were conducted to investigate the mechanical properties of the as-received materials.
The mechanical properties of carbon steel were employed to simulate the elastic deformation of the shim block.
Paulsen, A new mechanical calibration strategy for U-channel extrusions, Int.
Online since: January 2012
Authors: Shi Gen Zhu, Xiao Ben Qi
Introduction
Nodular cast iron has been an attractive kind of materials for stamping and drawing dies of automobiles because of the combination of low cost of the material, good castability and good mechanical properties[1].
To improve the properties of the ductile iron, i.e. hardness, wear resistance, surface modification by lasers [2,3,4] and electron beams [5] have been used in the industrial application.
In this study, the main factors affecting the modified layer are electric current (I), rotating speed (ω) of the work piece, contact pressure (F) and flow rate of collant (v).
And the other factors supplied the requirement for the success of the experiment.
But the other factors have little effect on the width and depth of modified layer. 2.
To improve the properties of the ductile iron, i.e. hardness, wear resistance, surface modification by lasers [2,3,4] and electron beams [5] have been used in the industrial application.
In this study, the main factors affecting the modified layer are electric current (I), rotating speed (ω) of the work piece, contact pressure (F) and flow rate of collant (v).
And the other factors supplied the requirement for the success of the experiment.
But the other factors have little effect on the width and depth of modified layer. 2.
Online since: February 2014
Authors: Guo Liang Mou, Chao Xin Li, Jun You, Xue Jun Zhang, Zi Cheng Zhu
When it works, the ice layer is melted by water pressure and thermal power and other factors.
In this experiment, the factors influencing the deicing effect are nozzle aperture, the water-jet temperature, jet pressure, motor power and the distance and angle between nozzle and ice surface, etc.
Nozzle aperture and jet pressure are the main factors for this device.
In this model the relief angle is negative, which means only one surface of edge is affected by the ice cutting resistance.
Conducted repeated experiments to find out the impacting factors in the deicing work.
In this experiment, the factors influencing the deicing effect are nozzle aperture, the water-jet temperature, jet pressure, motor power and the distance and angle between nozzle and ice surface, etc.
Nozzle aperture and jet pressure are the main factors for this device.
In this model the relief angle is negative, which means only one surface of edge is affected by the ice cutting resistance.
Conducted repeated experiments to find out the impacting factors in the deicing work.
Online since: August 2014
Authors: Na Yin, Xian Tang Meng, Fei Li, Yang Cui, Zhi Wei Zhou
Table 1 Chemical compositions of 380CL(wt%)
C
Si
Mn
P
S
Alt
Standards
≤0.16
≤0.30
≤1.20
≤0.030
≤0.025
380CL
≤0.12
≤0.10
≤1.10
≤0.020
≤0.010
0.020-0.050
Mechanical Properties.
Table 2 shows the results of mechanical properties.
The results of mechanical properties in Table 2 show that values of strength and elongation are within the normal range.
Furthermore, the main factors caused butt welding cracks are material performances, baiting, crimping, the status of the electrode and its tip holder, scumming, side cut, rounding and flaring[5,6].
Bryant, Picklin: Steel properties and structures.
Table 2 shows the results of mechanical properties.
The results of mechanical properties in Table 2 show that values of strength and elongation are within the normal range.
Furthermore, the main factors caused butt welding cracks are material performances, baiting, crimping, the status of the electrode and its tip holder, scumming, side cut, rounding and flaring[5,6].
Bryant, Picklin: Steel properties and structures.
Online since: July 2019
Authors: Mohammad Ali Ketabi, Ali Sadeghi, Farbod Tondnevis, Reza Fekrazad, Mohamad Mahdi Abolhasani
Chemical composition, physical structure, surface properties and mechanical properties of scaffolds are necessary factors to enhance the cell-scaffold interaction [8-11].
Nano-HA and FHA have ability to increase mechanical properties such as compressive strength and modulus and biocompatibility of scaffold [18-20].
In addition, scaffolds need sufficient mechanical properties to support mechanical forces during implantation and tissue regeneration process.
Nano HA and FHA particles could play as a reinforced component in polymeric composite scaffold due to its superior mechanical properties [27-29].
Traditional factors.
Nano-HA and FHA have ability to increase mechanical properties such as compressive strength and modulus and biocompatibility of scaffold [18-20].
In addition, scaffolds need sufficient mechanical properties to support mechanical forces during implantation and tissue regeneration process.
Nano HA and FHA particles could play as a reinforced component in polymeric composite scaffold due to its superior mechanical properties [27-29].
Traditional factors.