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Monitoring Technological Conditions for Preparing DLC Films in Supersonic Flow of Hydrocarbon Plasma
Online since: January 2013
Authors: George A. Pozdnyakov, S.N. Svitasheva
The interest in thin diamond-like carbon (DLC) films is caused by their unique physical and chemical properties.
The film composition affects the mechanical stresses in the film, its corrosion properties, hardness, and resistance wear.
These limiting factors define the following parameters: a) mobility of particles over substrate, b) film thickness, and c) the rate of plasma pickling substrate.
Impact on DLC films properties of substrate temperature and density, velocity of plasma flow was studied.
Kolesov, Optical properties of TiO2 films made by air oxidation of Ti, Phys.
The film composition affects the mechanical stresses in the film, its corrosion properties, hardness, and resistance wear.
These limiting factors define the following parameters: a) mobility of particles over substrate, b) film thickness, and c) the rate of plasma pickling substrate.
Impact on DLC films properties of substrate temperature and density, velocity of plasma flow was studied.
Kolesov, Optical properties of TiO2 films made by air oxidation of Ti, Phys.
Online since: July 2013
Authors: Rajkumar Ohdar, Md Israr Equbal, Vinod Kumar
Furthermore, a statistical analysis of variance (ANOVA) is performed to find significant factors.
The most important stage in this method lies in the selection of control factors.
The total degree of freedom (DOF) for four factors each at three levels is 8.
Following are the simulation properties used as given in Table 4.
Flash thickness, billet temperature and friction coefficient observed as the most significant parameters affecting the response.
The most important stage in this method lies in the selection of control factors.
The total degree of freedom (DOF) for four factors each at three levels is 8.
Following are the simulation properties used as given in Table 4.
Flash thickness, billet temperature and friction coefficient observed as the most significant parameters affecting the response.
Online since: January 2012
Authors: Nazanin Farhadyar, Mirabdullah Seyed Sadjadi
It is well known that the chemical properties of the solid surfaces and their geometry affect wettability of them with liquid.
Another factor affecting the hydrophilic property is the chemical structure of the surfaces.
For many applications, the desired properties of coatings are mainly as follows: good adhesion, good hydrophilicity of the surface, and improvement in comparison with pure organic or inorganic coatings used [5-7] Polymer coatings lead to good adhesion but do not really improve the mechanical properties.
The compatibility between the organic and the inorganic phase strongly affects the thermal, mechanical, and optical properties.
The hydrophilic properties of surfaces were confirmed by contact angle measurements.
Another factor affecting the hydrophilic property is the chemical structure of the surfaces.
For many applications, the desired properties of coatings are mainly as follows: good adhesion, good hydrophilicity of the surface, and improvement in comparison with pure organic or inorganic coatings used [5-7] Polymer coatings lead to good adhesion but do not really improve the mechanical properties.
The compatibility between the organic and the inorganic phase strongly affects the thermal, mechanical, and optical properties.
The hydrophilic properties of surfaces were confirmed by contact angle measurements.
Online since: June 2014
Authors: Zhi Jun Liu, Xiao Le Li, Wei Gang Zheng
Mechanical & Electronic Engineering college, Guizhou University; Guiyang 550025
2.
School of physics & Mechanical Engineering, Xiamen University; Xiamen 361005 a237097004@qq.com,bweigangzheng@163.com,c907322541@qq.com Key word: Steering pump Bracket; Frame optimization; workbench; FEA Abstract.
The safe coefficient of the mechanical components is 1.3 ~ 1.5 [2].
The objective function are the minimum mass of bracket and the max stress, getting strength information and stiffness information from initial statics analysis, deciding final design scheme refer to optimized configuration and manufacturing process. adopting tetrahedron finite element as basic structure based on element properties of multi-objective frame optimization module in workbench14.0 Building optimal model and meshing.
P1---the thickness of left side plate, P2---the thickness of right side plate, P3---the thickness of first ribbed plate, P4---the thickness of second ribbed plate,P5---the thickness of third ribbed plate, P6---the thickness of forth ribbed plate (3) The safety factor value of the ordinary mechanical components is 1.3~1.5, for guaranteeing bracket safety we decide its safety factor value is greater than or equal to 1.5 Fig.5 Optimized geometric model Optimized results.
School of physics & Mechanical Engineering, Xiamen University; Xiamen 361005 a237097004@qq.com,bweigangzheng@163.com,c907322541@qq.com Key word: Steering pump Bracket; Frame optimization; workbench; FEA Abstract.
The safe coefficient of the mechanical components is 1.3 ~ 1.5 [2].
The objective function are the minimum mass of bracket and the max stress, getting strength information and stiffness information from initial statics analysis, deciding final design scheme refer to optimized configuration and manufacturing process. adopting tetrahedron finite element as basic structure based on element properties of multi-objective frame optimization module in workbench14.0 Building optimal model and meshing.
P1---the thickness of left side plate, P2---the thickness of right side plate, P3---the thickness of first ribbed plate, P4---the thickness of second ribbed plate,P5---the thickness of third ribbed plate, P6---the thickness of forth ribbed plate (3) The safety factor value of the ordinary mechanical components is 1.3~1.5, for guaranteeing bracket safety we decide its safety factor value is greater than or equal to 1.5 Fig.5 Optimized geometric model Optimized results.
Online since: July 2019
Authors: Wen Teng Wang, Yu Chen Lin
And it means that there are some important factors not considered in the study.
The size of the grain will affect the PLA properties.
When the grain size is larger than 100 μm, it will reduce the PLA mechanical properties.
"Mechanical properties of rice husks fiber reinforced polyester composites."
Urquiza, “Effect of the Recycling and Annealing on the Mechanical and Fracture Properties of Poly(Lactic Acid)”, J Polym Environ, Vol. 18 (2010), p. 654–660
The size of the grain will affect the PLA properties.
When the grain size is larger than 100 μm, it will reduce the PLA mechanical properties.
"Mechanical properties of rice husks fiber reinforced polyester composites."
Urquiza, “Effect of the Recycling and Annealing on the Mechanical and Fracture Properties of Poly(Lactic Acid)”, J Polym Environ, Vol. 18 (2010), p. 654–660
Online since: August 2011
Authors: Zhong Hai Liu, Ming Hai Wang, Wei Wang
Because titanium alloy has a lot of excellent properties, e.g. smaller density, higher specific strength, corrosion resistance and so on, it is widely used for making important engine thin-walled parts [1].
Many scholars engaged in the research of factors including cutting property, machining parameter, tool parameter and fixture [2-9], and obtained some achievements, but the research achievements in the field of experimental machining involved in precision cutting titanium alloy thin-walled parts is still fewer.
The vacuum cups fixture is used to prevent distortion and fixture stress from affecting the precision machining experiment.
In this study, in order to reduce deformation of workpiece and obtain a better surface quality in cutting process, three machining parameters are selected as controlled factors.
In this paper, the main factors affecting the objective function are only cutting speed, feed rate and cutting depth, so the objective function is given as: (2) where vc, f and ap are the design variables, Q is the material removal volume per unit time.
Many scholars engaged in the research of factors including cutting property, machining parameter, tool parameter and fixture [2-9], and obtained some achievements, but the research achievements in the field of experimental machining involved in precision cutting titanium alloy thin-walled parts is still fewer.
The vacuum cups fixture is used to prevent distortion and fixture stress from affecting the precision machining experiment.
In this study, in order to reduce deformation of workpiece and obtain a better surface quality in cutting process, three machining parameters are selected as controlled factors.
In this paper, the main factors affecting the objective function are only cutting speed, feed rate and cutting depth, so the objective function is given as: (2) where vc, f and ap are the design variables, Q is the material removal volume per unit time.
Online since: September 2013
Authors: Mohd Mustafa Al Bakri Abdullah, R.M. Ikhwan Zaini, Z.A. Ahmad, M. Mazlan, H.M. Nor Hakim, A. Bakir Azman
The origin and magnitude of various types of wear, such as flank wear, rake wear and notch wear are the dominant factors, which govern the machining performance of cutting tools.
All these factors for assessing the machining performance of a cutting tool are mutually inter-dependent.
Addition of MgO showed small effect to prevent the excessive chipping although it is not enough to extend the tool life for tool B thus increasing the properties of fracture toughness for ceramic insert.
Ahmad, “Effect of Al2O3/YSZ microstructures on wear and mechanical properties of cutting inserts,” Journal of Alloys and Compounds, Volume 478, Issues 1-2, 10 June 2009, pg: 608-614
“The effects of MgO addition on microstructure, mechanical properties and wear performance of zirconia-toughened alumina cutting inserts,” Journal of Alloys and Compounds, doi:10.1016/j.jallcom. 2010.03.054.
All these factors for assessing the machining performance of a cutting tool are mutually inter-dependent.
Addition of MgO showed small effect to prevent the excessive chipping although it is not enough to extend the tool life for tool B thus increasing the properties of fracture toughness for ceramic insert.
Ahmad, “Effect of Al2O3/YSZ microstructures on wear and mechanical properties of cutting inserts,” Journal of Alloys and Compounds, Volume 478, Issues 1-2, 10 June 2009, pg: 608-614
“The effects of MgO addition on microstructure, mechanical properties and wear performance of zirconia-toughened alumina cutting inserts,” Journal of Alloys and Compounds, doi:10.1016/j.jallcom. 2010.03.054.
Online since: July 2014
Authors: Li Jun Yang, Chao Jian Hou, Wei Qiang Chen, Liang Li, Yang Wang
Jose[9] also used 1064nm pulsed Nd:YAG laser to do the cutting experiments of CFRP, the results show that the good cutting quality can be obtained by laser parameters optimization used response surface method and put forward material composition and fiber volume content are the main factors to control cutting performance.
a)Along/vertical fibre direction b)A certain angle with fiber direction Fig.11 The surface topography of kerf under different cutting direction Summary 1) By choosing suitable laser parameters can effectively reduce the heat affected zone of surface; 2) When cutting direction is consistent with fiber direction, the heat affected zone of surface can be reduced; 3) Laser cutting speed is the most significant factor which affect the quality of cross-section; 4) Suitable laser parameters and the cutting direction can get no delaminated kerf which has less burr, small heat affected zone and smoothing cross section.
Journal of Mechanical & Electrical Engineering,2013(30):182-184
Mechanical Design and Theory in Hebei University of Science and Technology,2012:1-5
Study on microwave absorbing ability and mechanical properties of carbonous composiyes[D].Dong hua university,2008:27-28.
a)Along/vertical fibre direction b)A certain angle with fiber direction Fig.11 The surface topography of kerf under different cutting direction Summary 1) By choosing suitable laser parameters can effectively reduce the heat affected zone of surface; 2) When cutting direction is consistent with fiber direction, the heat affected zone of surface can be reduced; 3) Laser cutting speed is the most significant factor which affect the quality of cross-section; 4) Suitable laser parameters and the cutting direction can get no delaminated kerf which has less burr, small heat affected zone and smoothing cross section.
Journal of Mechanical & Electrical Engineering,2013(30):182-184
Mechanical Design and Theory in Hebei University of Science and Technology,2012:1-5
Study on microwave absorbing ability and mechanical properties of carbonous composiyes[D].Dong hua university,2008:27-28.
Online since: October 2011
Authors: Aisyah Omar, Muhammad Ikman Ishak, Muhamad Noor Harun, Eshamsul Sulaiman, Noor Hayaty Abu Kasim
However, one of the main factors of OMI failures is the implant insertion procedure in which the clinician find it difficult to obtain the best angle to insert the OMI.
All these factors should be considered by orthodontists to avoid the risk of complications during and after the treatment [2].
Thus, there are several factors from mechanical and biological point of view that affect the clinical performance of orthodontic mini-implant such as the dimension and design of implant, the thickness of cortical bone and the insertion angle of implant placement.
The material properties of the models were assumed to be homogeneous, isotropic and linearly elastic based on the previous studies [15, 16, 17].
The contact properties between the implant and bones were defined with a friction coefficient of 0.3.
All these factors should be considered by orthodontists to avoid the risk of complications during and after the treatment [2].
Thus, there are several factors from mechanical and biological point of view that affect the clinical performance of orthodontic mini-implant such as the dimension and design of implant, the thickness of cortical bone and the insertion angle of implant placement.
The material properties of the models were assumed to be homogeneous, isotropic and linearly elastic based on the previous studies [15, 16, 17].
The contact properties between the implant and bones were defined with a friction coefficient of 0.3.
Online since: November 2013
Authors: Yin Sheng Yang, Yue Meng Jiang, Hai Na Wang
Biological characteristics
Management strategy
Figure 2-3 Management biomimetic processes
As can be seen, constantly evaluating and improving the characteristics of the biomimetic process is a cyclical process, which is consistent with evolutionary characteristics and management of development properties.
The factors about technological innovation are the basic elements of technological innovation.
During biological enzyme the catalytic reaction process, the efficiency of the enzyme-catalyzed reaction is affected by some factors such as ultraviolet, rays, light, heat, surface active agents, metal salts and strong acid since there is changed in the structure of the enzyme protein [5] .
The agricultural enterprises technological innovation enzyme will be affected by a number of factors to determine the speed of development of technological innovation. 3) “Market substrate” similarity.
(1)Reasonable staffing structure and talent play potentially Team task needs to put into many factors together such as science, knowledge, information, resources, energy and many other factors, further re-processing, integration, changes in the accumulation process.
The factors about technological innovation are the basic elements of technological innovation.
During biological enzyme the catalytic reaction process, the efficiency of the enzyme-catalyzed reaction is affected by some factors such as ultraviolet, rays, light, heat, surface active agents, metal salts and strong acid since there is changed in the structure of the enzyme protein [5] .
The agricultural enterprises technological innovation enzyme will be affected by a number of factors to determine the speed of development of technological innovation. 3) “Market substrate” similarity.
(1)Reasonable staffing structure and talent play potentially Team task needs to put into many factors together such as science, knowledge, information, resources, energy and many other factors, further re-processing, integration, changes in the accumulation process.