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Online since: September 2017
Authors: Ľuboslav Straka, Slavomíra Hašová, František Špalek
Table 2 shows the physical properties of graphite electrodes with designation EX – 60 [8].
Table 2 Physical properties of the graphite with designation EX – 60[7] Density [g.cm-3] Hardness [Shore] Specific Resistance [Ω.m.10-6] Tensile Strength [MPa] Compressive strength [MPa] Typical Grain Size [μm] 1.8 62 13 80 140 10 Properties of copper electrodes.
Table 3 shows the chemical and physical properties of copper EN Cu-ETP (DIN E-Cu 58).
This method allows to assess the level of importance of the individual factors affecting the manufacturing process.
Evaluation of the effect of factors.
Table 2 Physical properties of the graphite with designation EX – 60[7] Density [g.cm-3] Hardness [Shore] Specific Resistance [Ω.m.10-6] Tensile Strength [MPa] Compressive strength [MPa] Typical Grain Size [μm] 1.8 62 13 80 140 10 Properties of copper electrodes.
Table 3 shows the chemical and physical properties of copper EN Cu-ETP (DIN E-Cu 58).
This method allows to assess the level of importance of the individual factors affecting the manufacturing process.
Evaluation of the effect of factors.
Online since: September 2017
Authors: L.V. Radionova, M.A. Sosedkova, T.A. Lisovskaya
We herein present a mathematical model of hot rolling temperature parameters that factors in how the strip temperature changes in the rolling stand and in the inter-stand gap as well as when metal is transported along the mill train.
Those parameters affect the plastic properties of the roll, the parameters of drafting, the energy and power parameters of the process, the structure and the quality of rolled products, etc.
The model to find the temperature of metals in the technological flow of the rolling mill is generally written as follows [1] , where is the temperature of the metal at the previous calculation point or the initial temperature, ; are the losses of temperature when the metal is being rolled or transported along the mill train, ; is heating of the metal during its deformation, ; is the increase in the temperature of the metal, induced by the heating devices of the mill, ; is the cooling of the metal, induced by the cooling devices of the same, ; are the factors affecting the changes in the roll temperature; are the factors contributing to the cooling of the metal when rolled or transported along the mill train; are the factors causing the heating of the roll during the plastic deformation process; are the heating devices in the rolling mill train; are the cooling devices in the rolling mill train.
The module is implemented as a software product based on the mathematical hot rolling model; it is designed to help study how the technological parameters of hot rolling affect the energy and power parameters of the process, the temperature parameters, the physical and chemical properties as well as the geometry of sheets.
Pesin, Choice of strategy and cooling modes of rolled products to achieve the required set of consumer properties, Ferrous metallurgy. 4 (2011) 64-69
Those parameters affect the plastic properties of the roll, the parameters of drafting, the energy and power parameters of the process, the structure and the quality of rolled products, etc.
The model to find the temperature of metals in the technological flow of the rolling mill is generally written as follows [1] , where is the temperature of the metal at the previous calculation point or the initial temperature, ; are the losses of temperature when the metal is being rolled or transported along the mill train, ; is heating of the metal during its deformation, ; is the increase in the temperature of the metal, induced by the heating devices of the mill, ; is the cooling of the metal, induced by the cooling devices of the same, ; are the factors affecting the changes in the roll temperature; are the factors contributing to the cooling of the metal when rolled or transported along the mill train; are the factors causing the heating of the roll during the plastic deformation process; are the heating devices in the rolling mill train; are the cooling devices in the rolling mill train.
The module is implemented as a software product based on the mathematical hot rolling model; it is designed to help study how the technological parameters of hot rolling affect the energy and power parameters of the process, the temperature parameters, the physical and chemical properties as well as the geometry of sheets.
Pesin, Choice of strategy and cooling modes of rolled products to achieve the required set of consumer properties, Ferrous metallurgy. 4 (2011) 64-69
Online since: September 2013
Authors: Ping Wang, Ji Huan He, Ling Ye Wu
Many attempts have been made to reveal the tearing properties of textiles.
These factors are listed in Table 3.
Table 3 The factors which influence the he fabric elongation ΔL when the first mesh is destroyed Mesh Yarn Warp knitted fabric Geometrical properties The inscribed circle diameter of a mesh[d]; The angle of the adjacent two edges of the mesh[]; The edge number of the mesh[n] Yarn radius[r]; Yarn density[D]; Yarn spacing[d] Physical and mechanical properties Elastic modulus[]; Elongation at break[]; Friction coefficient[] Elastic modulus[E]; Elongation at break[] ; Friction coefficient[]; Tearing Strength[F] After forecasting, experimental and mechanical analyzing for the tearing process of warp knitted fabrics with hexagonal meshes, we confirm four main factors which influence the fabric elongation ΔL when the first mesh is destroyed.
The results show that the tearing properties of warp knitted fabrics with hexagonal meshes depend on the geometrical and mechanical parameters(and ) of fabrics.
Xu: Tearing properties of the coated multiaxial warp knitted fabric.
These factors are listed in Table 3.
Table 3 The factors which influence the he fabric elongation ΔL when the first mesh is destroyed Mesh Yarn Warp knitted fabric Geometrical properties The inscribed circle diameter of a mesh[d]; The angle of the adjacent two edges of the mesh[]; The edge number of the mesh[n] Yarn radius[r]; Yarn density[D]; Yarn spacing[d] Physical and mechanical properties Elastic modulus[]; Elongation at break[]; Friction coefficient[] Elastic modulus[E]; Elongation at break[] ; Friction coefficient[]; Tearing Strength[F] After forecasting, experimental and mechanical analyzing for the tearing process of warp knitted fabrics with hexagonal meshes, we confirm four main factors which influence the fabric elongation ΔL when the first mesh is destroyed.
The results show that the tearing properties of warp knitted fabrics with hexagonal meshes depend on the geometrical and mechanical parameters(and ) of fabrics.
Xu: Tearing properties of the coated multiaxial warp knitted fabric.
Online since: May 2014
Authors: Priyan Mendis, Saeed Miramini, Li Hai Zhang, Martin Richardson
However, as the mechanical properties of locking plate material (e.g. stainless steel and titanium) are normally much higher than that of bone, the high stiffness of locking plate might still suppress IFM required for indirect bone healing [3, 4, 7].
The material properties of the cortical bone, marrow and fracture callus applied in this study are shown in Table 1.
In other words formation of a symmetric tissue is a critical factor affecting the healing outcomes [2, 4].
Jung, "The finite element analysis of a fractured tibia applied by composite bone plates considering contact conditions and time-varying properties of curing tissues," Composite Structures, vol. 92, pp. 2109-2118, 2010
Margevicius, et al., "Effects of mechanical factors on the fracture healing process.," Clinical orthopaedics and related research, pp.
The material properties of the cortical bone, marrow and fracture callus applied in this study are shown in Table 1.
In other words formation of a symmetric tissue is a critical factor affecting the healing outcomes [2, 4].
Jung, "The finite element analysis of a fractured tibia applied by composite bone plates considering contact conditions and time-varying properties of curing tissues," Composite Structures, vol. 92, pp. 2109-2118, 2010
Margevicius, et al., "Effects of mechanical factors on the fracture healing process.," Clinical orthopaedics and related research, pp.
Online since: September 2012
Authors: Rui Huo, Jin Hua Xie, Yan Feng Guan, Ying Gao
(3)
1.2 The establishment of cutting stability figure
According to control engineering theory, time domain properties of output about the vibration system depends on the roots’ nature of characteristic equations of the system’s transfer function .
Observed from Fig.d, the whole stability curve move to the right with the increase of the natural frequency ωn .Direction coefficient u is also a basic factor affected by processing process.
Because there are many nonlinear factors in actual processing, amplitude of chatter will not increase indefinitely, but will continue in a particular amplitude. 4 Example calculation about limit cutting width of regenerative chatter system Considering of the complexity of formula in the second quarter, use another mathematical way to calculate the limit cutting width in here.
Kinematics differential equation has been established, cutting system stability has been discussed, stability figure has been drew, and the factors affecting the stability of chatter has been explored.
Advanced manufacturing technology and its development trend[J].Journal of mechanical engineering .2003,10(39) [4] Qiangxing Zhang, Sainsbury M G.
Observed from Fig.d, the whole stability curve move to the right with the increase of the natural frequency ωn .Direction coefficient u is also a basic factor affected by processing process.
Because there are many nonlinear factors in actual processing, amplitude of chatter will not increase indefinitely, but will continue in a particular amplitude. 4 Example calculation about limit cutting width of regenerative chatter system Considering of the complexity of formula in the second quarter, use another mathematical way to calculate the limit cutting width in here.
Kinematics differential equation has been established, cutting system stability has been discussed, stability figure has been drew, and the factors affecting the stability of chatter has been explored.
Advanced manufacturing technology and its development trend[J].Journal of mechanical engineering .2003,10(39) [4] Qiangxing Zhang, Sainsbury M G.
Online since: March 2009
Authors: Janina Adamus
Titanium and its alloys are noteworthy materials
because of their unique properties, which include low specific gravity (4.43 ÷ 4.85 g/cm
3), high
mechanical properties (tensile strength from Rm ≈ 240 MPa for commercially pure titanium Grade 1
to Rm ≈ 1750 MPa for heat treated beta alloys [6]) and good corrosion resistance.
Of the many factors which have a direct influence on the course of sheet-titanium forming processes, the values that can be controlled are: - geometrical factors such as: shape and size of the blank, corner radius of the die and punch, - external factors e.g. holding-down force and the way it is implemented, frictional conditions.
As friction is a very important factor affecting the course of the sheet-metal forming process, the proper selection of the technological lubricants and the determination of the area, which should be lubricated, is essential.
Gunawarmana, Mitsuo Niinomia, Toshikazu Akahoria, Junichi Takedaa, Hiroyuki Toda: Mechanical properties of Ti-4.5Al-3V-2Mo-2Fe and possibility for healthcare applications.
Gierzyńska-Dolna: Tribological properties of titanium alloys (in Polish).
Of the many factors which have a direct influence on the course of sheet-titanium forming processes, the values that can be controlled are: - geometrical factors such as: shape and size of the blank, corner radius of the die and punch, - external factors e.g. holding-down force and the way it is implemented, frictional conditions.
As friction is a very important factor affecting the course of the sheet-metal forming process, the proper selection of the technological lubricants and the determination of the area, which should be lubricated, is essential.
Gunawarmana, Mitsuo Niinomia, Toshikazu Akahoria, Junichi Takedaa, Hiroyuki Toda: Mechanical properties of Ti-4.5Al-3V-2Mo-2Fe and possibility for healthcare applications.
Gierzyńska-Dolna: Tribological properties of titanium alloys (in Polish).
Online since: July 2011
Authors: Chakaravarthy Ezilarasan, Ke Zhu, A Velayudham, K. Palanikumar
Assessment of factors influencing tool wear on the machining of Nimonic C-263 alloy with PVD coated carbide inserts
C.Ezilarasan1a, V.S.Senthil kumar2b, A.Velayudham3c, K.Palanikumar4d
1.
Research Scholar, Department of Mechanical Engineering, Anna University, Chennai-25, India 2* Associate Professor, Department of Mechanical Engineering, Anna University, Chennai-25, India, 3Combat Vehicles Research and Development Establishment, Chennai-54, Avadi, India, 4Sri Sairam Institute of Technology, Chennai-119, India Email : aezhilshriram.c@gmail.com, bvsskumar@annauniv.edu Keywords: Nimonic; C-263;Turning; ANOVA; Modeling; RSM; SEM; Flank wear; Abstract: Nimonic C-263 alloy is extensively used in the field of like aerospace, power generators and heat exchangers due to its higher thermal properties.
From the above literatures, the importance of cutting conditions and tool material is clear as these induce the tool wear there by affecting the surface integrity of the material.
Determination of the optimum factor level The calculated S/N ratio of the three factors on the flank wear in machining the C-263 alloy for each level is shown in Table 4.
The optimum factor level was determined based on the S/N and ANOVA analysis.
Research Scholar, Department of Mechanical Engineering, Anna University, Chennai-25, India 2* Associate Professor, Department of Mechanical Engineering, Anna University, Chennai-25, India, 3Combat Vehicles Research and Development Establishment, Chennai-54, Avadi, India, 4Sri Sairam Institute of Technology, Chennai-119, India Email : aezhilshriram.c@gmail.com, bvsskumar@annauniv.edu Keywords: Nimonic; C-263;Turning; ANOVA; Modeling; RSM; SEM; Flank wear; Abstract: Nimonic C-263 alloy is extensively used in the field of like aerospace, power generators and heat exchangers due to its higher thermal properties.
From the above literatures, the importance of cutting conditions and tool material is clear as these induce the tool wear there by affecting the surface integrity of the material.
Determination of the optimum factor level The calculated S/N ratio of the three factors on the flank wear in machining the C-263 alloy for each level is shown in Table 4.
The optimum factor level was determined based on the S/N and ANOVA analysis.
Online since: December 2013
Authors: M. Fathullah, Z. Shayfull, S.M. Nasir, M.F.M.A. Hamzas, Norshah Afizi Shuaib
Selection of Factors
b.
These factors were chosen based on the thermal properties of is SABIC Innovative Plastics Cycolac MG47 ABS as well as recommended processing value by Autodesk Moldflow Insight 2011 software.
Only the effects of the 5 factors are taken into considerations and other factors are neglected.
As for conformal cooling channel, the most significant factor that affects the warpage is packing pressure at 45.28%.
Filling time which is the most significant factor affecting warpage in straight cooling channel drops to the second position with 28.12%.
These factors were chosen based on the thermal properties of is SABIC Innovative Plastics Cycolac MG47 ABS as well as recommended processing value by Autodesk Moldflow Insight 2011 software.
Only the effects of the 5 factors are taken into considerations and other factors are neglected.
As for conformal cooling channel, the most significant factor that affects the warpage is packing pressure at 45.28%.
Filling time which is the most significant factor affecting warpage in straight cooling channel drops to the second position with 28.12%.
Online since: March 2015
Authors: Hai Xia Chen
We use quartz crystal material from a physical point of constitutive equations derived in detail combined with the boundary conditions of the liquid Kanasawa QCM response model and Martin correction BVD equivalent circuit model; then apply transmission line theory and the theory of Acoustic impedance load, the research results can be useful as a QCM-D model, response model and Martin mode, then in-depth analysis of the liquid phase conditions, factors affecting the QCM frequency change, we propose a new method for measuring the density of the unknown liquid viscosity supplement.
Transmission line model can be caused by mechanical displacement of sound waves into electrical signals, and vice versa.
Due to the unique properties of quartz crystal material, making the quartz wafer by the external electric field frequency is an even multiple of its natural frequency, polarization-induced excitation average charge equal to zero, resonance does not occur.
Utilizing this property can be extended to obtain: quality quartz crystal frequency offset its surface adsorbed is linearly proportional.
Figure.3 Load impedance of QCM with frequency Thus, closely related to the acoustic load material properties change with sheer mass deposition, the deposition process or quality, changes in material properties or by the chemical adsorption, physical effects.
Transmission line model can be caused by mechanical displacement of sound waves into electrical signals, and vice versa.
Due to the unique properties of quartz crystal material, making the quartz wafer by the external electric field frequency is an even multiple of its natural frequency, polarization-induced excitation average charge equal to zero, resonance does not occur.
Utilizing this property can be extended to obtain: quality quartz crystal frequency offset its surface adsorbed is linearly proportional.
Figure.3 Load impedance of QCM with frequency Thus, closely related to the acoustic load material properties change with sheer mass deposition, the deposition process or quality, changes in material properties or by the chemical adsorption, physical effects.
Online since: March 2018
Authors: Napassavong Osothsilp, Jakkapan Jariyajirawatana
Quality of RCS depends on many crucial properties and some of them are mechanical properties.
The temperature of sand before releasing into the mixing process and the time to release each type of materials in the mixing process should be at proper levels to prevent premature curing or cross links between phenolic resin and hexamine, which affects mechanical properties of RCS [1].
The properties of sand and phenolic resin used in the type of RCS under study were shown in Table 1.
Properties of sands and phenolic resins in RCS under study.
It was found all factors significantly affected bending strength except for the time to release calcium stearate.
The temperature of sand before releasing into the mixing process and the time to release each type of materials in the mixing process should be at proper levels to prevent premature curing or cross links between phenolic resin and hexamine, which affects mechanical properties of RCS [1].
The properties of sand and phenolic resin used in the type of RCS under study were shown in Table 1.
Properties of sands and phenolic resins in RCS under study.
It was found all factors significantly affected bending strength except for the time to release calcium stearate.