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Online since: December 2007
Authors: Samuel I En Lin
These include its unique guiding and dispersive properties, a wide
range of single mode operation, highly birefringent characteristics (~10-3), and high-power light
transmission, etc.
Birefringence caused by geometrical factors, such as elliptic holes or nonsymmetrical cell arrangement in PCF, has been reported by Lin [5].
The stress distribution will greatly affect the birefringence of PCF via general photo-elastic relation.
In this report, we present some of the design factors on the influence of PCF birefringence.
Table 1 shows the material properties used in the analysis.
Birefringence caused by geometrical factors, such as elliptic holes or nonsymmetrical cell arrangement in PCF, has been reported by Lin [5].
The stress distribution will greatly affect the birefringence of PCF via general photo-elastic relation.
In this report, we present some of the design factors on the influence of PCF birefringence.
Table 1 shows the material properties used in the analysis.
Online since: December 2012
Authors: Yong Lu, Dong Gao, Ming Liang Zhang, Wei Chen
In addition, the flux pinning exhibits a variety of special characteristics, such as no-mechanical connection, the passive stability and the selective constrained degrees of freedom (DOFs).
As is known with experiment, the mutual force is relative to lots of factors, such as the magnetic strength, the gap between the HTSC and PM and field-cooling height, as well as the temperature of HTSC.
It is known that the flux pinned vertical force dependent on other factors, such as the property of superconductor material and the influence of temperature, so a new proportional coefficent of performance is added into IDM.
The improved formula is given vent with addition of a novel proportional coefficient of performance affected by other factors.
Z., Preparation and properties of PMP YBCO bulk with submicrometre Y2BaCUO5 Particles, Superconducting Science and Technology, Vol. 13, 2000, pp. 703-708
As is known with experiment, the mutual force is relative to lots of factors, such as the magnetic strength, the gap between the HTSC and PM and field-cooling height, as well as the temperature of HTSC.
It is known that the flux pinned vertical force dependent on other factors, such as the property of superconductor material and the influence of temperature, so a new proportional coefficent of performance is added into IDM.
The improved formula is given vent with addition of a novel proportional coefficient of performance affected by other factors.
Z., Preparation and properties of PMP YBCO bulk with submicrometre Y2BaCUO5 Particles, Superconducting Science and Technology, Vol. 13, 2000, pp. 703-708
Online since: September 2010
Authors: Tsutomo Sekine, Toshiyuki Obikawa
It has been reported that mechanical attrition treatment promoted the
formation of nanostructured surface layer [1].
In addition, it was reported that cold rolling had great effect on mechanical properties of austenitic stainless steels [10]; the increase in the cold reduction rate increased the tensile strength, whereas decreased the ductility.
Strain-induced martensitic transformation is also known as one of the factors to enhance formability.
The figures show that both factors decreased with increase in humidity.
From the results, the frictional phenemena can affect the surface condition of material.
In addition, it was reported that cold rolling had great effect on mechanical properties of austenitic stainless steels [10]; the increase in the cold reduction rate increased the tensile strength, whereas decreased the ductility.
Strain-induced martensitic transformation is also known as one of the factors to enhance formability.
The figures show that both factors decreased with increase in humidity.
From the results, the frictional phenemena can affect the surface condition of material.
Online since: December 2009
Authors: Bekir Sami Yilbas, Iyad T. Alzaharnah, S. Al-Kaabi
Introduction
Characteristics of flexural motion of a bar depend on the mechanical properties such as density,
stiffness and damping factor of the substrate material.
Once any one of these properties is modified, the wave characteristics of the motion will change.
In this case, the bar resembles the cantilever assembly with non-uniform mechanical properties due to heating.
Initially the substrate material is assumed to be at a reference temperature, To, therefore, the initial condition becomes: 0 at t TT o = = The thermal properties of the bar material used are given as: 53 W/m.K for thermal conductivity and 520 J/kg.k for specific heat.
The structural material properties are given as: 7880 kg/m3 for density, 0.015 for damping coefficient and 1.5 × 10-5 1/K for thermal expansion coefficient.
Once any one of these properties is modified, the wave characteristics of the motion will change.
In this case, the bar resembles the cantilever assembly with non-uniform mechanical properties due to heating.
Initially the substrate material is assumed to be at a reference temperature, To, therefore, the initial condition becomes: 0 at t TT o = = The thermal properties of the bar material used are given as: 53 W/m.K for thermal conductivity and 520 J/kg.k for specific heat.
The structural material properties are given as: 7880 kg/m3 for density, 0.015 for damping coefficient and 1.5 × 10-5 1/K for thermal expansion coefficient.
Online since: January 2014
Authors: Yun Fei Mai, Wen Jing Ding, Shao Long Liu
Its property directly affects the performance, handling stability and safety of vehicle.
Fitness Function with Improved Discipline Factor.
PSO algorithm with disciplinary factors can significantly improve the system's fluctuations, making the system more stable and meet the test requirements.
In a word, the PSO algorithm with disciplinary factors to optimize PI parameter is feasible, effective and it can greatly reduce the test bench system tuning control parameters time.
[4] Taichi Shiiba: Journal of Mechanical Science and Technology, Vol.4 (2009) No.23, p.954
Fitness Function with Improved Discipline Factor.
PSO algorithm with disciplinary factors can significantly improve the system's fluctuations, making the system more stable and meet the test requirements.
In a word, the PSO algorithm with disciplinary factors to optimize PI parameter is feasible, effective and it can greatly reduce the test bench system tuning control parameters time.
[4] Taichi Shiiba: Journal of Mechanical Science and Technology, Vol.4 (2009) No.23, p.954
Online since: December 2012
Authors: Cai Hong Ding, Pei Liu
On the one hand, the holding force of each clip on batteries’ electrode is one of the main factors to influence the contact resistance and voltage drop on them.
It is found obviously from the actual production that the holding force on the electrode, exerted by clips, is a key factor to affect both the battery charging and discharging performance and the consistency of li-ion batteries[2].
Since the inaccuracy of the spring, machining and mechanical assembly, the clip’s holding force of the same specification is even different, no matter in the same or different batches.
In this way, circuit and working temperature[3] has a great influence on the signal, and affects the accuracy of measurement.
[3] Yun Ye, Yadong Jiang, Zhiming Wu, Guangzhong Xie, Hongjuan Zeng, Study on Temperature Dependent Piezoelectric Properties of PVDF Thin Films, Proceedings of 6th International Symposium on Test and Measurement(Volume 3)(2005) [4] Interlink Electronics force sensing resistor (FSR) [BD/OL]. [0.10-02-04]. http://www.interlinkelectronices.com/force_sensors/technologise/fsr.html [5] Bruce Carter, Ron Mancini, Jianqing Yao, Authoritative guide of operational amplifier, Third ed.
It is found obviously from the actual production that the holding force on the electrode, exerted by clips, is a key factor to affect both the battery charging and discharging performance and the consistency of li-ion batteries[2].
Since the inaccuracy of the spring, machining and mechanical assembly, the clip’s holding force of the same specification is even different, no matter in the same or different batches.
In this way, circuit and working temperature[3] has a great influence on the signal, and affects the accuracy of measurement.
[3] Yun Ye, Yadong Jiang, Zhiming Wu, Guangzhong Xie, Hongjuan Zeng, Study on Temperature Dependent Piezoelectric Properties of PVDF Thin Films, Proceedings of 6th International Symposium on Test and Measurement(Volume 3)(2005) [4] Interlink Electronics force sensing resistor (FSR) [BD/OL]. [0.10-02-04]. http://www.interlinkelectronices.com/force_sensors/technologise/fsr.html [5] Bruce Carter, Ron Mancini, Jianqing Yao, Authoritative guide of operational amplifier, Third ed.
Online since: August 2016
Authors: Stiliana Raynova, Brian Gabbitas, Fei Yang, Leandro Bolzoni
Abstract: This research focuses on the development of low cost powder metallurgy (PM) Ti alloys suitable for application in PM thermomechanical processing with mechanical properties comparable to those of wrought Ti6Al4V alloy.
The higher YS and UTS are because of two factors: firstly, the severe deformation during thermomechanical processing results in extra strong interparticle cohesion; secondly, the comparatively high oxygen content of the starting Ti or Ti6Al4V HDH powders.
The physical and mechanical properties such as sintered density and tensile properties are presented and compared.
The tensile properties of the as sintered samples are shown in Fig. 3 as a comparison with the tensile properties of the further thermomechanically treated samples.
Further thermomechanical treatment by ODF and PCE did not improve the properties.
The higher YS and UTS are because of two factors: firstly, the severe deformation during thermomechanical processing results in extra strong interparticle cohesion; secondly, the comparatively high oxygen content of the starting Ti or Ti6Al4V HDH powders.
The physical and mechanical properties such as sintered density and tensile properties are presented and compared.
The tensile properties of the as sintered samples are shown in Fig. 3 as a comparison with the tensile properties of the further thermomechanically treated samples.
Further thermomechanical treatment by ODF and PCE did not improve the properties.
Online since: August 2017
Authors: Grzegorz Struzikiewicz, Ksenia Rumian
Introduction
The selection procedure of machining conditions is a complex process and there are numerous factors that should be taken into consideration.
The development of metallurgy resulted in the improvement of many properties of alloys, but at the same time caused a significantly more difficult machining process of those alloys.
Some factors related to the procedure of the cutting parameters selection have a great significance for the environment protections, such as the elimination of the cooling during cutting process.
Due to the fact two determining factors of the shape and dimensional accuracy and the changes of field temperature and cutting force distribution are that the value of the feed and cutting speed, those two parameters were assumed as variables f and vc respectively.
Graphic representation of the effect of variables on a mean value of the specific cutting force kc (a) and S/N signal (b) The results of the analysis show that the most important parameter affecting to the value of cut resistance is the feed.
The development of metallurgy resulted in the improvement of many properties of alloys, but at the same time caused a significantly more difficult machining process of those alloys.
Some factors related to the procedure of the cutting parameters selection have a great significance for the environment protections, such as the elimination of the cooling during cutting process.
Due to the fact two determining factors of the shape and dimensional accuracy and the changes of field temperature and cutting force distribution are that the value of the feed and cutting speed, those two parameters were assumed as variables f and vc respectively.
Graphic representation of the effect of variables on a mean value of the specific cutting force kc (a) and S/N signal (b) The results of the analysis show that the most important parameter affecting to the value of cut resistance is the feed.
Online since: January 2005
Authors: J.S. Park, Do Hyang Kim, J.H. Kim, Myung Hyun Lee, Won Tae Kim
Introduction
Considering the mechanical properties of the amorphous materials, amorphous particles or fibers
can be an excellent candidate for the reinforcing phase in the ductile metal matrix composites [1, 2,
3].
While outstanding mechanical properties of amorphous materials have been recognized in many studies, the limited thermal stability often provided a significant obstacle for practicing the amorphous phase as reinforcing materials during casting process [4-6].
For the evaluation of the mechanical property, uniaxial compression tests were conducted using an Instron-type machine (Hounsfield H25KT) at room temperature with a strain rate of 4.0 x 10 -3 s-1.
Another important factor for the successful fabrication of the composite is a stable interface between the reinforcing phase and the matrix.
Lyman, Metals Handbook 8th Ed.: Properties and Selection of Metals, ASM, Ohio (1961) pp. 957
While outstanding mechanical properties of amorphous materials have been recognized in many studies, the limited thermal stability often provided a significant obstacle for practicing the amorphous phase as reinforcing materials during casting process [4-6].
For the evaluation of the mechanical property, uniaxial compression tests were conducted using an Instron-type machine (Hounsfield H25KT) at room temperature with a strain rate of 4.0 x 10 -3 s-1.
Another important factor for the successful fabrication of the composite is a stable interface between the reinforcing phase and the matrix.
Lyman, Metals Handbook 8th Ed.: Properties and Selection of Metals, ASM, Ohio (1961) pp. 957
Online since: August 2021
Authors: Olga V. Vodopyanova, Sergey O. Nepryakhin
Roll pass sequence
Matrix (Latin square) of incomplete factor analysis was compiled (table 1) in order to determine the patterns of relationships of the influence of the speed mismatch during continuous high-speed rolling according to the oval-round-oval sequence (see Figure 1).
The deviation of the roll rotation frequency in the considered stand (first and/or third) from the rotation frequency of the rolls corresponding to the matched mode determined by the simulation results was chose as the factors affecting the technological parameters of the rolling process.
Also, when setting the tasks, the following conditions were accepted: - the rolling process is symmetrical; - the working tool is a completely rigid body; - the rolled material is characterized by uniformity and isotropy of properties, and its rheology is represented by the dependence of the yield stress on the basic thermomechanical parameters; - the contact interaction is described by shear types of friction with the value of the friction factor is 1.
0.59 5.91 0.101 0.05 1.08 6.47 0.166 -10 0 -0.11 0.67 6.13 0.110 -0.12 0.61 7.01 0.090 -0.59 1.35 6.86 0.197 0 10 -0.32 0.68 6.17 0.110 -0.02 0.51 6.06 0.084 0.09 1.16 6.11 0.190 -10 10 -0.05 0.72 6.07 0.118 0.17 0.59 5.62 0.104 -0.52 1.21 6.56 0.184 5 0 -0.54 0.74 6.06 0.112 -0.02 0.52 5.79 0.089 -1.99 0.91 8.46 0.108 0 -5 -0.37 0.69 6.01 0.115 -0.07 0.55 6.09 0.090 -0.38 1.26 6.81 0.184 5 -5 -0.71 0.76 6.46 0.117 -0.09 0.55 5.87 0.093 -2.32 0.99 5.87 0.168 10 0 -0.58 0.74 6.25 0.119 -0.15 0.60 6.39 0.093 -0.01 0.91 6.29 0.144 0 -10 -0.48 0.76 6.59 0.115 -0.13 0.59 6.29 0.094 -1.10 1.08 7.18 0.151 10 -10 -0.87 0.76 6.54 0.116 -0.03 0.53 5.99 0.090 -0.45 1.23 6.83 0.180 -5 -5 -0.53 0.75 6.49 0.115 -0.04 0.57 6.05 0.094 0.04 1.23 6.32 0.194 5 5 -0.27 0.71 6.33 0.112 -0.06 0.53 6.02 0.088 -0.29 1.37 6.60 0.207 It is worth noting that under the influence of dam stresses, there is a noticeable increase in the proportion of compressive stresses in the center of the blank, which can favorably affect
Odinsov, Improvement of electric and mechanical system for automated strip tension control at continuous wide-strip hot-rolling mill, Procedia Engineering. 150 (2016) 11-17
The deviation of the roll rotation frequency in the considered stand (first and/or third) from the rotation frequency of the rolls corresponding to the matched mode determined by the simulation results was chose as the factors affecting the technological parameters of the rolling process.
Also, when setting the tasks, the following conditions were accepted: - the rolling process is symmetrical; - the working tool is a completely rigid body; - the rolled material is characterized by uniformity and isotropy of properties, and its rheology is represented by the dependence of the yield stress on the basic thermomechanical parameters; - the contact interaction is described by shear types of friction with the value of the friction factor is 1.
0.59 5.91 0.101 0.05 1.08 6.47 0.166 -10 0 -0.11 0.67 6.13 0.110 -0.12 0.61 7.01 0.090 -0.59 1.35 6.86 0.197 0 10 -0.32 0.68 6.17 0.110 -0.02 0.51 6.06 0.084 0.09 1.16 6.11 0.190 -10 10 -0.05 0.72 6.07 0.118 0.17 0.59 5.62 0.104 -0.52 1.21 6.56 0.184 5 0 -0.54 0.74 6.06 0.112 -0.02 0.52 5.79 0.089 -1.99 0.91 8.46 0.108 0 -5 -0.37 0.69 6.01 0.115 -0.07 0.55 6.09 0.090 -0.38 1.26 6.81 0.184 5 -5 -0.71 0.76 6.46 0.117 -0.09 0.55 5.87 0.093 -2.32 0.99 5.87 0.168 10 0 -0.58 0.74 6.25 0.119 -0.15 0.60 6.39 0.093 -0.01 0.91 6.29 0.144 0 -10 -0.48 0.76 6.59 0.115 -0.13 0.59 6.29 0.094 -1.10 1.08 7.18 0.151 10 -10 -0.87 0.76 6.54 0.116 -0.03 0.53 5.99 0.090 -0.45 1.23 6.83 0.180 -5 -5 -0.53 0.75 6.49 0.115 -0.04 0.57 6.05 0.094 0.04 1.23 6.32 0.194 5 5 -0.27 0.71 6.33 0.112 -0.06 0.53 6.02 0.088 -0.29 1.37 6.60 0.207 It is worth noting that under the influence of dam stresses, there is a noticeable increase in the proportion of compressive stresses in the center of the blank, which can favorably affect
Odinsov, Improvement of electric and mechanical system for automated strip tension control at continuous wide-strip hot-rolling mill, Procedia Engineering. 150 (2016) 11-17