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Online since: June 2013
Authors: Peng Wang, Guo Qiang Liu, Di Wu
Because the physical and mechanical properties of miscellaneous fill are discrete and irregular, we cannot use uniform physical indexes to describe it.
Meanwhile, considering the miscellaneous fill with many irregular properties, it is difficult, sometime impossible, to sample and test in situ.
To analyze how the values of c and φ affect soil nailing wall design, an engineering example calculated and analyzed by Lizheng-FSPw60 is given.
Factor of safety against overturning and sliding must meet the requirements of the specification in each variable calculation. 1.Influence of C and Φ Values on the Stability of the Foundation Pit In this analysis process, parameters were all constant values except c and φ.
Surface layer is jetted by 100±20mm C20 fine stone concrete. 2.Design and Checking Calculation The checking results of external stability are that the average design value of the pressure at the bottom of the foundation 108 kPa < 150 kPa, the max design value of the pressure at the edge of the foundation 146 kPa < 12150 kPa, factor of safety against overturning 14.65 > 1.60 and factor of safety against sliding 1.62 > 1. 30.
Meanwhile, considering the miscellaneous fill with many irregular properties, it is difficult, sometime impossible, to sample and test in situ.
To analyze how the values of c and φ affect soil nailing wall design, an engineering example calculated and analyzed by Lizheng-FSPw60 is given.
Factor of safety against overturning and sliding must meet the requirements of the specification in each variable calculation. 1.Influence of C and Φ Values on the Stability of the Foundation Pit In this analysis process, parameters were all constant values except c and φ.
Surface layer is jetted by 100±20mm C20 fine stone concrete. 2.Design and Checking Calculation The checking results of external stability are that the average design value of the pressure at the bottom of the foundation 108 kPa < 150 kPa, the max design value of the pressure at the edge of the foundation 146 kPa < 12150 kPa, factor of safety against overturning 14.65 > 1.60 and factor of safety against sliding 1.62 > 1. 30.
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
Online since: December 2014
Authors: Marcela Bučányová, Eva Riečičiarová
Dynamic properties of the gearing affect behaviour of a machine aggregate as the complete unit and effect also technological process quality to a large degree.
Depiction a - depiction of the standard initial defect vectors, b - depiction of teeth surface contact One of the important properties of the spiroid gearings is possibility to gain a large overlap factor.
It allows then to design mechanism with improved accuracy and better vibration-acoustic properties.
References [1] Mudrik, J. and all: Modelling and Properties Analysis of a Geared Machine Aggregate.
[3] Král, Š.; Kinematic accuracy and dynamic properties of gearing.
Depiction a - depiction of the standard initial defect vectors, b - depiction of teeth surface contact One of the important properties of the spiroid gearings is possibility to gain a large overlap factor.
It allows then to design mechanism with improved accuracy and better vibration-acoustic properties.
References [1] Mudrik, J. and all: Modelling and Properties Analysis of a Geared Machine Aggregate.
[3] Král, Š.; Kinematic accuracy and dynamic properties of gearing.
Online since: March 2021
Authors: M.M.H. Shamsudin, N.H. Hamid, M.A. Mohd Fauzi
The fresh physical properties of recycled PET fiber reinforced concrete is slump test while the hardened mechanical properties are compressive strength and flexural strength.
Therefore, the interlocking of fibers that resists the flow of fresh concrete is affecting the workability of concrete.
Table 3 shows the summary of all results of mechanical properties obtained throughout this study.
Faisal, The Mechanical Properties of PET Fiber Reinforced Concrete from Recycled Bottle Wastes, Adv.
Montedo, Mechanical Properties of Recycled PET Fibre in Concrete, Mater.
Therefore, the interlocking of fibers that resists the flow of fresh concrete is affecting the workability of concrete.
Table 3 shows the summary of all results of mechanical properties obtained throughout this study.
Faisal, The Mechanical Properties of PET Fiber Reinforced Concrete from Recycled Bottle Wastes, Adv.
Montedo, Mechanical Properties of Recycled PET Fibre in Concrete, Mater.
Online since: November 2013
Authors: Wen Wen Deng, Fang Wang, Ferdinand M. Machibya, Shang Gao, Xiao Long Wang, Min Hu
Material properties
Table 2.
The findings of this study should not be generally applied into clinical practices in which teeth movements are significantly affected by multiple patients’ factors such as masticatory forces, salivary lubrication and orofacial muscle functions.
Factors associated with the stability of titanium screws placed in the posterior region for orthodontic anchorage.
A prospective study of the risk factors associated with failure of mini-implants used for orthodontic anchorage.
Effects of predrilling depth and implant shape on the mechanical properties of orthodontic mini-implants during the insertion procedure.
The findings of this study should not be generally applied into clinical practices in which teeth movements are significantly affected by multiple patients’ factors such as masticatory forces, salivary lubrication and orofacial muscle functions.
Factors associated with the stability of titanium screws placed in the posterior region for orthodontic anchorage.
A prospective study of the risk factors associated with failure of mini-implants used for orthodontic anchorage.
Effects of predrilling depth and implant shape on the mechanical properties of orthodontic mini-implants during the insertion procedure.
Online since: December 2024
Authors: Thammaporn Thublaor, Phatarapol Thongsan
The development of multiphase bainitic/martensitic steel aims to enhance the mechanical properties and corrosion resistance compared to traditional pearlitic steel.
U75V is favored due to its mechanical properties that meet the demands of local railway infrastructure.
The steels include U20Mn-1 (granular bainite + martensite), U20Mn-2 (acicular bainite), and U75V (pearlitic structure), each selected for its unique properties relevant to railway applications in tropical climates.
Additionally, the metals will be characterized to study the corrosion behavior and the factors influencing their corrosion resistance.
These factors contribute to a more stable structure less susceptible to corrosion.
U75V is favored due to its mechanical properties that meet the demands of local railway infrastructure.
The steels include U20Mn-1 (granular bainite + martensite), U20Mn-2 (acicular bainite), and U75V (pearlitic structure), each selected for its unique properties relevant to railway applications in tropical climates.
Additionally, the metals will be characterized to study the corrosion behavior and the factors influencing their corrosion resistance.
These factors contribute to a more stable structure less susceptible to corrosion.
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: 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: July 2015
Authors: Azwan Sapit, Amir Khalid, Mohd Faisal Hushim, Mohd Azahari Razali, M. Jaat, Akmal Nizam Mohammad
Fuel-air mixing is important process in diesel combustion which significantly affects the combustion and emission of diesel engine.
These kinds of emission formation are greatly affected by spray atomization.
Precise optimization of the fuel injection, spray atomization and fuel-air mixing are among the fundamental factors that control the combustion and emission formation[4-5].
Difference in droplet size, with the larger droplets of RO have bigger kinetic energy and the not easily affected by air entrainment.
Manshoor, Izzuddin Zaman, “Impacts of biodiesel storage duration on fuel properties and emissions”, Procedia Engineering, volume 68, 2013, Pages 225 – 230, Elsevier, 2013, DOI: 10.1016/j.proeng.2013.12.172
These kinds of emission formation are greatly affected by spray atomization.
Precise optimization of the fuel injection, spray atomization and fuel-air mixing are among the fundamental factors that control the combustion and emission formation[4-5].
Difference in droplet size, with the larger droplets of RO have bigger kinetic energy and the not easily affected by air entrainment.
Manshoor, Izzuddin Zaman, “Impacts of biodiesel storage duration on fuel properties and emissions”, Procedia Engineering, volume 68, 2013, Pages 225 – 230, Elsevier, 2013, DOI: 10.1016/j.proeng.2013.12.172
Online since: November 2011
Authors: Kun Zhu, Ai Min Ji, Quan Sheng Huang
Methods Determining the Weights of Characteristics in Mechanical Products Design on Case-base Reasoning
Aimin Jia, Kun Zhub and Quansheng Huangc
College of Mechanical & Electrical Engineering,Hohai University, Changzhou, Jiangsu,213022,China
ajam@ustc.edu, bzhukun80074925@126.com chuangquans@126.com
Keywords: Case-based reasoning, Weights of case characteristics, Analytic hierarchy process, Roughness set theory, Combination weighting method.
It is more obvious in some areas which mechanical experiences occupy a certain position.
Subjective weighting assignment is given subjectively by experts according to experiences and practical judgment of themselves, therefore it maybe affected by some factors like experts’ mood and outside environment and the result is often different of everyone.
Some definitions and properties of related conceptions are as follows: (1) The conception of equivalent set ① The definition of equivalent set Definition 1: for (one or some attributes included in A), is true, so objects and are equivalent about attribute set A.
It is more obvious in some areas which mechanical experiences occupy a certain position.
Subjective weighting assignment is given subjectively by experts according to experiences and practical judgment of themselves, therefore it maybe affected by some factors like experts’ mood and outside environment and the result is often different of everyone.
Some definitions and properties of related conceptions are as follows: (1) The conception of equivalent set ① The definition of equivalent set Definition 1: for (one or some attributes included in A), is true, so objects and are equivalent about attribute set A.