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Online since: July 2014
Authors: Mao Yue Li, Yun Zhong Fu, Hai Bin Yu
In this paper, the situation about the blade machining with the finite element analysis is introduced, and the factors about the blade machining deformation is also summarized.
The most important is the mechanical and physical properties can be obtained from the finite element simulation results.
The deformations of the tool, work-piece and machine tools and other factors were considered in this model, but the coupling effect between the tool deformation and work-piece deformation were not considered.
Therefore, the factors of the milling force, deformation and radial cutting depth will affect each other.
Chinese Journal of Mechanical Engineering, 2001, 37(1): 6-10.
The most important is the mechanical and physical properties can be obtained from the finite element simulation results.
The deformations of the tool, work-piece and machine tools and other factors were considered in this model, but the coupling effect between the tool deformation and work-piece deformation were not considered.
Therefore, the factors of the milling force, deformation and radial cutting depth will affect each other.
Chinese Journal of Mechanical Engineering, 2001, 37(1): 6-10.
Online since: February 2006
Authors: Xian Li Liu, Fu Gang Yan, Y.F. Li, Yang Wang, Jing Shu Hu, Yan Jun Wang
Based on the above discussion, research on grinding PCD tools at present mostly focused on
grinding mechanism and single factor's optimization under the definite condition, lack of
researching and optimizing integrated effect of certain factors on grinding process.
Experimental Method This study chose PCD tools with E Six CTB002 brand material whose mechanical and physical property is shown in Table 1.
This experiment chose grinding speed (rotational speed of grinding wheel), grain size of grinding wheel and grinding pressure that affect grinding process at the most, and was carried out in orthogonal experimental method, L9(3 4 ) orthogonal table with 3 factors and 3 levels.
The experimental factors and levels are shown in Table 2.
Therefore, to grinding efficiency, the best grinding efficiency is rotational speed 3500r/min, grain Table 2 Value of experimental factors and levels Factor 1 Factor 2 Factor 3 Factor level Rotational speed [r/min] Grain size [µm] Grinding pressure [Pa] Level 1 1500 09 5.5 Level 2 2500 15 4.0 Level 3 3500 22 2.5 size 22µm (or 9µm), grinding pressure 2.5Pa.
Experimental Method This study chose PCD tools with E Six CTB002 brand material whose mechanical and physical property is shown in Table 1.
This experiment chose grinding speed (rotational speed of grinding wheel), grain size of grinding wheel and grinding pressure that affect grinding process at the most, and was carried out in orthogonal experimental method, L9(3 4 ) orthogonal table with 3 factors and 3 levels.
The experimental factors and levels are shown in Table 2.
Therefore, to grinding efficiency, the best grinding efficiency is rotational speed 3500r/min, grain Table 2 Value of experimental factors and levels Factor 1 Factor 2 Factor 3 Factor level Rotational speed [r/min] Grain size [µm] Grinding pressure [Pa] Level 1 1500 09 5.5 Level 2 2500 15 4.0 Level 3 3500 22 2.5 size 22µm (or 9µm), grinding pressure 2.5Pa.
Online since: December 2012
Authors: Zhi Min Lu, Yu Long Zheng, Guang Liang Zhou, Lin Zhang
This shows the performance of CFRP pressure vessel is related not only with fiber strength but also with material properties of resin matrix, tension and solidifying system of winding process.
Basis for normal distribution properties it is little that deviation treble standard deviation, which is about 3% and can be neglected in engineering.
This shows the performance of composite is not only related with fiber strength but also with matrix formulation and fabrication technology. 4.1 Material properties of resin matrix have an important effect on composite properties, specimens in this test have been manufactured by continuous carbon fiber–-amine system, a new flexible formula.
A part of winding tension even equal to zero and this seriously affect the performance of carbon fiber materials.
Research direction: Mechanical Properties of Pressure Vessel and Solid Rocket Motor Case.
Basis for normal distribution properties it is little that deviation treble standard deviation, which is about 3% and can be neglected in engineering.
This shows the performance of composite is not only related with fiber strength but also with matrix formulation and fabrication technology. 4.1 Material properties of resin matrix have an important effect on composite properties, specimens in this test have been manufactured by continuous carbon fiber–-amine system, a new flexible formula.
A part of winding tension even equal to zero and this seriously affect the performance of carbon fiber materials.
Research direction: Mechanical Properties of Pressure Vessel and Solid Rocket Motor Case.
Online since: August 2019
Authors: Victoria Malets, Petro Savchuk, Vitalii Kashytskyi, Dmitro Matrunchyk, Anastasia Kushniruk
The advantage of nanoscale fillers is that they have high elastic, mechanical, plastic, magnetic, electrical and tribological properties [2].
Ultrasonic treatment positively affects the structure and physical and mechanical properties of epoxy composites, regardless of the magnetic susceptibility of the filler.
[2] Buketov А.V., Sapronov О.О., Brailo М.V., Aleksenko V.L., Influence of the ultrasonic treatment on the mechanical and thermal properties of epoxy nanocomposites, Materials Science. – Vol. 49, Number 5, 2014, рр. 696-702
[8] Stuhlyak, P.D., Epoxy-dyano composites: technology of forming, physico-mechanical and thermophysical properties, Ternopil: Step, 2011, 165
[11] Sanzharovsky A.T., Physico-mechanical properties of polymer and paint coatings, M.: Chemistry, 1978, 184
Ultrasonic treatment positively affects the structure and physical and mechanical properties of epoxy composites, regardless of the magnetic susceptibility of the filler.
[2] Buketov А.V., Sapronov О.О., Brailo М.V., Aleksenko V.L., Influence of the ultrasonic treatment on the mechanical and thermal properties of epoxy nanocomposites, Materials Science. – Vol. 49, Number 5, 2014, рр. 696-702
[8] Stuhlyak, P.D., Epoxy-dyano composites: technology of forming, physico-mechanical and thermophysical properties, Ternopil: Step, 2011, 165
[11] Sanzharovsky A.T., Physico-mechanical properties of polymer and paint coatings, M.: Chemistry, 1978, 184
Online since: August 2011
Authors: Bing Hao Bao, Feng Jiang
The mechanism of the pulsed current annealing affecting the GMI effect is explained qualitatively.
Introduction The giant magneto-impedance (GMI) effect has attracted considerable scientific and technological interest especially because of its applicability in magnetic sensing and as an additional tool to investigate soft magnetic materials properties [1, 2, 3].
The penetration depth depends on electrical and magnetic properties of the conductor, such as conductivity, and circular permeability at a given frequency.
Thus, the magnetic anisotropy is a key factor affecting magneto-impedance effect.
Fig. 1 Experiment set-up for GMI Fig. 2 Schematic view of the magnetization of the magnetic domain The theory of influence of pulsed current annealing on the GMI effect There are two main reasons for the pulsed current annealing affecting the GMI effect.
Introduction The giant magneto-impedance (GMI) effect has attracted considerable scientific and technological interest especially because of its applicability in magnetic sensing and as an additional tool to investigate soft magnetic materials properties [1, 2, 3].
The penetration depth depends on electrical and magnetic properties of the conductor, such as conductivity, and circular permeability at a given frequency.
Thus, the magnetic anisotropy is a key factor affecting magneto-impedance effect.
Fig. 1 Experiment set-up for GMI Fig. 2 Schematic view of the magnetization of the magnetic domain The theory of influence of pulsed current annealing on the GMI effect There are two main reasons for the pulsed current annealing affecting the GMI effect.
Online since: April 2019
Authors: Marek Tarraste, Egidijus Katinas, Maksim Antonov, Vytenis Jankauskas
Results help to identify and understand melting and solidification of grains affected at high temperature.
Unfortunately, there are other negative factors as well: deformation and structural changes, sinking of reinforced material in lower density matrix (could be visible in cross-section) [8,9].
SEM and EDS analysis of microstructure shows behaviour of particles affected by temperature.
In interdiffusion zone, Co was changed by Fe because of their similar properties.
This temperature and holding time are very good for connection between matrix and small hardening phase but results in reduction of mechanical properties of W2F2C or W6Fe6C [13] (Fig. 6b).
Unfortunately, there are other negative factors as well: deformation and structural changes, sinking of reinforced material in lower density matrix (could be visible in cross-section) [8,9].
SEM and EDS analysis of microstructure shows behaviour of particles affected by temperature.
In interdiffusion zone, Co was changed by Fe because of their similar properties.
This temperature and holding time are very good for connection between matrix and small hardening phase but results in reduction of mechanical properties of W2F2C or W6Fe6C [13] (Fig. 6b).
Online since: May 2020
Authors: N.E. Skryabina, Olga M. Kanunnikova, V.I. Lad’yanov
Such changes in the properties indicate the change of the electronic structure of the atoms of the alloy composition elements.
Most investigations of the processes of the hydrogen interaction with amorphous alloys are focused on alloy bulk properties.
At the ion bombardment of the multicomponent alloy, the phases with stronger interatomic bonds and smaller etch factors form protruding irregularities.
Skryabina, Effect of hydrogen on the properties of amorphous alloys “finemet” type: PEN-X effect.
Pavlova, Interaction of the surface of ribbons of amorphous soft-magnetic iron-based alloys with water and their magnetic properties, Phys.
Most investigations of the processes of the hydrogen interaction with amorphous alloys are focused on alloy bulk properties.
At the ion bombardment of the multicomponent alloy, the phases with stronger interatomic bonds and smaller etch factors form protruding irregularities.
Skryabina, Effect of hydrogen on the properties of amorphous alloys “finemet” type: PEN-X effect.
Pavlova, Interaction of the surface of ribbons of amorphous soft-magnetic iron-based alloys with water and their magnetic properties, Phys.
Online since: September 2013
Authors: Gaetano S. Palazzo, Pierpaolo Carlone
Pultrusion process: scheme (a); tapered inlet (b); Couette flow in the liquid region (c); mechanical properties computation in the gel zone (d); TCR between die and material surfaces (e).
This force acts along a direction normal to die surfaces, thus not affecting the pulling force except at the tapered die entrance (Fig. 1b).
Moreover, taking into account the non-homogeneous and anisotropic nature of the composite material, lumped properties (herein computed following the rules of mixtures [2-6,10,12]) should be introduced.
The post-processing of thermochemical results provided viscosity profiles, as well as work piece dimensional changes and mechanical properties distribution in the cross section (Fig. 4a).
Vaughan, An analysis of factors affecting pull force for the pultrusion of graphite/epoxy composites, J.
This force acts along a direction normal to die surfaces, thus not affecting the pulling force except at the tapered die entrance (Fig. 1b).
Moreover, taking into account the non-homogeneous and anisotropic nature of the composite material, lumped properties (herein computed following the rules of mixtures [2-6,10,12]) should be introduced.
The post-processing of thermochemical results provided viscosity profiles, as well as work piece dimensional changes and mechanical properties distribution in the cross section (Fig. 4a).
Vaughan, An analysis of factors affecting pull force for the pultrusion of graphite/epoxy composites, J.
Online since: September 2016
Authors: A.A. Nuraini, S.M. Sapuan, Mohamad Ridzwan Ishak, M.F.M. Alkbir
Therefore, the current work focuses on using kenaf fiber due to the good mechanical properties and widely commercially availability of this material.
Due to of the elastic properties of constituent materials began to be insulted continuously.
Furthermore, reducing the mechanical properties in the region was destroyed affecting adjacent regions and accelerates Mode-III is associated with a brittle fracturing crushing and splaying mode.
Yuan, Improving the mechanical properties of natural fibre fabric reinforced epoxy composites by alkali treatment, J.
Al-shuja, Influence of fiber content on mechanical , morphological and thermal properties of kenaf fibers reinforced poly ( vinyl chloride )/ thermoplastic polyurethane poly-blend composites, J.
Due to of the elastic properties of constituent materials began to be insulted continuously.
Furthermore, reducing the mechanical properties in the region was destroyed affecting adjacent regions and accelerates Mode-III is associated with a brittle fracturing crushing and splaying mode.
Yuan, Improving the mechanical properties of natural fibre fabric reinforced epoxy composites by alkali treatment, J.
Al-shuja, Influence of fiber content on mechanical , morphological and thermal properties of kenaf fibers reinforced poly ( vinyl chloride )/ thermoplastic polyurethane poly-blend composites, J.
Online since: November 2013
Authors: Wei Yao Hsu, Yuan Chieh Cheng, Pei Jen Wang
During mass production, one of the key factors in costs reduction is to enhance lifetime of the molding tools.
In this study, a novel material made of a nickel-phosphorus-polytetrafluoroethylene (Ni-P-PTFE) compound was plated electrolessly on experimental dies to study relevant properties.
Since Ni-P-PTFE exhibits strong anti-adhesion properties, it is noted to improve the lifetime of the dies.
In conclusion, the adhesion phenomenon is interpreted via hydrophobic contact angles showing that hydrophobic contact angle of Ni-P-PTFE surfaces is smaller when compared to Ni-P surfaces which infers the anti-adhesion properties of Ni-P-PTFE materials.
Finally, hydrophobic effects in term of contact angle measurement are used for demonstration of anti-adhesion properties of Ni-P-PTFE plated surface.
In this study, a novel material made of a nickel-phosphorus-polytetrafluoroethylene (Ni-P-PTFE) compound was plated electrolessly on experimental dies to study relevant properties.
Since Ni-P-PTFE exhibits strong anti-adhesion properties, it is noted to improve the lifetime of the dies.
In conclusion, the adhesion phenomenon is interpreted via hydrophobic contact angles showing that hydrophobic contact angle of Ni-P-PTFE surfaces is smaller when compared to Ni-P surfaces which infers the anti-adhesion properties of Ni-P-PTFE materials.
Finally, hydrophobic effects in term of contact angle measurement are used for demonstration of anti-adhesion properties of Ni-P-PTFE plated surface.