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Online since: February 2006
Authors: Jing Tao Han, Hong Li
Materials and Experimental Procedure
The materials to be joined in the present investigation were commercial 1.2mm-thick cold rolled
carbon steel DQ sheet and the chemical composition and mechanical property are shown in Table 1.
Chemical composition and mechanical property of low carbon steel DQ Chemical composition [wt.%] C Si Mn P S AlS Ca Tensile strength σ b [MPa] Yield strength σ s [MPa] 0.051 0.032 0.181 0.009 0.006 0.031 0.0024 325 210 The Ag-72wt%Cu alloy foil in 50µm thickness was selected as the interlayer material.
This phenomenon indicates temperature is an important factor of diffusion, and thus influencing the bonding strength.
Temperature is a significant factor affecting diffusion and bonding strength
Chemical composition and mechanical property of low carbon steel DQ Chemical composition [wt.%] C Si Mn P S AlS Ca Tensile strength σ b [MPa] Yield strength σ s [MPa] 0.051 0.032 0.181 0.009 0.006 0.031 0.0024 325 210 The Ag-72wt%Cu alloy foil in 50µm thickness was selected as the interlayer material.
This phenomenon indicates temperature is an important factor of diffusion, and thus influencing the bonding strength.
Temperature is a significant factor affecting diffusion and bonding strength
Online since: July 2014
Authors: Santosh Kumar Mishra, Ramashankar Paswan, Kumar Sujit, Ajit Kumar, Jayanta Das, Niranjan Kumar
Introduction
Hydraulic motors convert hydraulic energy in to mechanical energy.
The model shows that hydraulic spring and nonlinear friction are major factors that can affect low-speed instability.
The stiffness of the hydraulic spring does effect when the closed cylinder is affected by outside force, which could be described as follows: K1=ΣFΔxp=ApβcL (1x1L-x12) (2) From Function (2), when dkh / dx1= 0 dk1dx1=ApβcL[2x1-L(x1L-x12)2 ] (3) When x1 = L / 2, dK1 / dx1 = 0, so K1=4ApβcL= 4βcAp2Vt (4) Work on current research of a balanced hydraulic motor that focuses on the characteristics of the motor with three planet gears [2].
According to the effects of physic- chemical properties of water on water hydraulic components, a novel valve plate for water hydraulic axial motor has been put forward whose moment exerted by the fluid field between valve plate and bearing plate is balanced entirely.
[2] YU Hongying, LUO Changjie and WANG Huimin,“ Performances of a Balanced Hydraulic Motor with Planetary Gear Train”, Chinese Journal of Mechanical Engineering, Harbin 150001, China (2012) [3] H.X.
The model shows that hydraulic spring and nonlinear friction are major factors that can affect low-speed instability.
The stiffness of the hydraulic spring does effect when the closed cylinder is affected by outside force, which could be described as follows: K1=ΣFΔxp=ApβcL (1x1L-x12) (2) From Function (2), when dkh / dx1= 0 dk1dx1=ApβcL[2x1-L(x1L-x12)2 ] (3) When x1 = L / 2, dK1 / dx1 = 0, so K1=4ApβcL= 4βcAp2Vt (4) Work on current research of a balanced hydraulic motor that focuses on the characteristics of the motor with three planet gears [2].
According to the effects of physic- chemical properties of water on water hydraulic components, a novel valve plate for water hydraulic axial motor has been put forward whose moment exerted by the fluid field between valve plate and bearing plate is balanced entirely.
[2] YU Hongying, LUO Changjie and WANG Huimin,“ Performances of a Balanced Hydraulic Motor with Planetary Gear Train”, Chinese Journal of Mechanical Engineering, Harbin 150001, China (2012) [3] H.X.
Online since: June 2013
Authors: A.R. Daneshmehr, D.J. Inman, A.R. Nateghi
It was observed that the anisotropy of the material affected the coefficients significantly.
Krawczuk and Ostachowicz [3] investigated cracked Euler-Bernoulli composite beam and the effects of material properties on the behavior of the beam, i.e. fiber orientation and volume fraction, on the behavior of the beam.
The governing equations of the composite beam is derived using Hamilton principal and can be simplified as (2) where and , , and are given by (3) In addition, we have (4) K is the shear-correction factor and should be evaluated based on the properties and stacking sequence of the laminate, though, here K is assumed 5/6 as in a rectangular section of a homogenous beam because the differences of shear-correction factors of isotropic and composite beams are shown to be negligible.
The material and geometrical properties given in the paper are as follows.
International Journal of Mechanical Science 2008, 50 : 1611-18
Krawczuk and Ostachowicz [3] investigated cracked Euler-Bernoulli composite beam and the effects of material properties on the behavior of the beam, i.e. fiber orientation and volume fraction, on the behavior of the beam.
The governing equations of the composite beam is derived using Hamilton principal and can be simplified as (2) where and , , and are given by (3) In addition, we have (4) K is the shear-correction factor and should be evaluated based on the properties and stacking sequence of the laminate, though, here K is assumed 5/6 as in a rectangular section of a homogenous beam because the differences of shear-correction factors of isotropic and composite beams are shown to be negligible.
The material and geometrical properties given in the paper are as follows.
International Journal of Mechanical Science 2008, 50 : 1611-18
Online since: August 2013
Authors: Sheng Yuan Jiang, Jiang Yong Li, Wen Fei Wang, Gao Jian Cui
Mechanism of Medium Pressure Difference Pipe Robot Speed Fluctuation
Gaojian Cui1, a, Shenyuan Jiang1,2,3,b, Jiangyong Li2,c and Wenfei Wang3,d
1 College of Electromechanical Engineering, Changchun University of Science and Technology, Changchun, China
2 College of Mechanical Engineering, Beihua University, Jilin,, China
3 College of Electromechanical Engineering, Harbin University of Technology, Harbin China
agaojiancui@126.com, bjiangshy_2002@163.com, c604204901@qq.com
Keywords: Medium pressure difference, Pipe robot, Speed fluctuation, Simulation
Abstract.
Figure 2 Comparison of three speed fluctuation curve Conclusions The main factors of affecting speed fluctuation conclude the speed influence coefficient, Robot quality, Equivalent stiffness, equivalent damping and Friction resistance mutation value.
Equivalent stiffness and equivalent damping depend on the nature of the physical environment of the pipe and the fluid medium is the inherent properties of the system.
Figure 2 Comparison of three speed fluctuation curve Conclusions The main factors of affecting speed fluctuation conclude the speed influence coefficient, Robot quality, Equivalent stiffness, equivalent damping and Friction resistance mutation value.
Equivalent stiffness and equivalent damping depend on the nature of the physical environment of the pipe and the fluid medium is the inherent properties of the system.
Online since: September 2013
Authors: Lian Jun Hu, Hong Song, Xiao Hui Zeng, Qian Li
The Research on Automatic Liquor Blending Systems Based on Wavelet Neural Networks
Lianjun Hu 1, a, Xiaohui Zeng 2,b, Hong Song 2, c and Qian Li2, d
1 School of Mechanical Engineering, Sichuan University of Science & Engineering, Zigong, China
2 School of Automation and Electronic Information Engineering, Sichuan University of Science & Engineering, Zigong, China
ahlj28288@sina.com, b xh-z@sohu.com , csh8887878@sina.com,d weiyiwoniuke@163.com
Keywords: wavelet neural networks; automatic blending; MATLAB.
Processes for automatic blending of liquors Fig. 1 Processes of the automatic blending Factors affecting qualities of liquors during production processes, which may be environmental, microbiological and chemical, physical, etc, are complicated and hard to be control precisely.
Fig. 4 Network/data manager window Summary The wavelet transformation with time-frequency localization properties and the neural network which has advantages of ability to develop, fault-tolerance, self-adaptability, self-learning, and robustness are introduced into the automatic liquor blending system.
Processes for automatic blending of liquors Fig. 1 Processes of the automatic blending Factors affecting qualities of liquors during production processes, which may be environmental, microbiological and chemical, physical, etc, are complicated and hard to be control precisely.
Fig. 4 Network/data manager window Summary The wavelet transformation with time-frequency localization properties and the neural network which has advantages of ability to develop, fault-tolerance, self-adaptability, self-learning, and robustness are introduced into the automatic liquor blending system.
Online since: January 2015
Authors: Ben Li, Fan You, Yong Guang Huang
Not only to assume the role of a mechanical connection, but also assume the role of electrical connections.
On BGA solder joints itself, the main factors affecting the solder joint reliability under the vibration impact loading environment are the diameter and height of the solder joint.
The reason may be at the combined position, due to the different material properties and geometric cross-section size changes are more dramatic, then it is prone to stress concentration under the shock and vibration environment.
On BGA solder joints itself, the main factors affecting the solder joint reliability under the vibration impact loading environment are the diameter and height of the solder joint.
The reason may be at the combined position, due to the different material properties and geometric cross-section size changes are more dramatic, then it is prone to stress concentration under the shock and vibration environment.
Online since: October 2011
Authors: Min Wang
Besides the traditional practical factors, technical factors, aesthetic factors and symbolic factors, it also should include the requirements of modern society, such as the market factor, interpersonal factor and environmental factors, etc. moreover, it also relocates the connotation of traditional design factors and their correlations and make more profound expression.
If lack of the systematic design concept and the way of analyzing the design factors systematically, it is very difficult to recognize the complicated design factors, even more difficult to achieve the design objects, and just fall into the blind “design”.
When one of the factors changed, it inevitably causes the overall change in varying degrees.
If the market demand factors varied in this system, the rest factors in this system must vary accordingly, so as to make the system lie in a certain motion state.
Summary For the design of the modern ceramics products, the factors involved with process factors (such as the whole design process, the product life cycle and the process of information feedback), function factors (including practical function, cognitive function and aesthetic function), form factors (including shape, color and texture), technical factors (such as the material technology, production technology, information technology, management technique and operation technology, etc), economic factors (such as the market demand and competition situation and economic value, etc.) and environmental factors (environmental protection, green design and sustainable development) and so on.
If lack of the systematic design concept and the way of analyzing the design factors systematically, it is very difficult to recognize the complicated design factors, even more difficult to achieve the design objects, and just fall into the blind “design”.
When one of the factors changed, it inevitably causes the overall change in varying degrees.
If the market demand factors varied in this system, the rest factors in this system must vary accordingly, so as to make the system lie in a certain motion state.
Summary For the design of the modern ceramics products, the factors involved with process factors (such as the whole design process, the product life cycle and the process of information feedback), function factors (including practical function, cognitive function and aesthetic function), form factors (including shape, color and texture), technical factors (such as the material technology, production technology, information technology, management technique and operation technology, etc), economic factors (such as the market demand and competition situation and economic value, etc.) and environmental factors (environmental protection, green design and sustainable development) and so on.
Online since: July 2014
Authors: R. Deepak Joel Johnson, G. Ugrasen
G2 *
#Department of Mechanical Science, Karunya University, Coimbatore-641114, India
1deepak.peter11@gmail.com
*Central Manufacturing Technology Institute, Tumkur Road, Bangalore-560022, India.
2ugrasen.g@gmail.com
Keywords: Laser Dressing, Superabrasive Wheels, CBN.
Although mechanical dressing is an effective approach, it can also cause deep cracks and damage which may loosen grains causing the number of cutting edge to get reduced.
Further the dressing tool wear affect the wheel dressing process which alters the grinding wheel surface topography and the wheel performance decreased.
Heat Affected Zone (HAZ): In our work the grinding wheel surface is investigated to see whether the wheel surface is affected due to the heat generated during laser dressing.
Hirao Masatoshi, Izawa Masaki, Iguchi Nobuaki, Shirase Keiichi, Yasui Takeshi,” Water jet in process dressing (1st Report) dressing property and jet pressure”, Journal of Japan Society of Precision Engineering, 1998; 64(9), Pg.1335–1339.
Although mechanical dressing is an effective approach, it can also cause deep cracks and damage which may loosen grains causing the number of cutting edge to get reduced.
Further the dressing tool wear affect the wheel dressing process which alters the grinding wheel surface topography and the wheel performance decreased.
Heat Affected Zone (HAZ): In our work the grinding wheel surface is investigated to see whether the wheel surface is affected due to the heat generated during laser dressing.
Hirao Masatoshi, Izawa Masaki, Iguchi Nobuaki, Shirase Keiichi, Yasui Takeshi,” Water jet in process dressing (1st Report) dressing property and jet pressure”, Journal of Japan Society of Precision Engineering, 1998; 64(9), Pg.1335–1339.
Online since: January 2014
Authors: Si Hua Zeng, Chun Wei, Ming Zeng, Xue Mei Xiong, Hong Xia Liu, Jian Lv, Ai Miao Qin
The fiber treatment methods had great influence on the friction and wear properties of the fiber composites.
The fiber treatments greatly improved the friction and wear properties of the fiber composites.
a c ba Effect of sisal fiber contents on the friction and wear properties.
In this case, the transfer film formed between the composites and the matching parts could be destroyed, and the tribology properties of the material could be affected.
Furthermore, the thermal resistance of the material is another important influencing factor on the friction and wear properties.
The fiber treatments greatly improved the friction and wear properties of the fiber composites.
a c ba Effect of sisal fiber contents on the friction and wear properties.
In this case, the transfer film formed between the composites and the matching parts could be destroyed, and the tribology properties of the material could be affected.
Furthermore, the thermal resistance of the material is another important influencing factor on the friction and wear properties.
Online since: January 2015
Authors: Yun Long Zhang, Mu Qin Li, Ping Liao, Yu Min Zhang
Among the factors that determined the characteristics of the MAO coatings, which included power source, oxidation time, the electrolyte composition and concentration, applied voltage and current density.
So the modifier EDTA-2Na with appropriate content would improve the surface properties of the biological inert ceramic coating.
The modifier EDTA-2Na with appropriate content would improve the surface properties of the biological inert ceramic coating.The introduce of doped EDTA-2Na improved the corrosion resistance properties.
Structure and mechanical properties of magnesium alloy treated by micro-arc discharge oxidation using direct current and high-frequency bipolar pulsing modes [J].
Duo, Influence of phytic acid concentration on coating properties obtained by MAO treatment on magnesium alloys [J].
So the modifier EDTA-2Na with appropriate content would improve the surface properties of the biological inert ceramic coating.
The modifier EDTA-2Na with appropriate content would improve the surface properties of the biological inert ceramic coating.The introduce of doped EDTA-2Na improved the corrosion resistance properties.
Structure and mechanical properties of magnesium alloy treated by micro-arc discharge oxidation using direct current and high-frequency bipolar pulsing modes [J].
Duo, Influence of phytic acid concentration on coating properties obtained by MAO treatment on magnesium alloys [J].