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Online since: June 2023
Authors: Raja Nor Izawati Raja Othman, Noor Amieza Mohamad, Nur Fazlin Abdul Jamilr
To improve electrical and mechanical properties, combine carbon nanotubes with insulating polymers [9].
It has good chemical resistance, adhesion, heat and electrical resistance, low shrinkage, and mechanical properties, including strength and hardness [12].
Adding fillers may enhance mechanical and physical properties [14].
The thickness of the composite is one of the important factors that affect the permittivity of the samples in this study.
Agarwal, “A study of mechanical properties of epoxy resin in presence of different hardeners,” Technol.
It has good chemical resistance, adhesion, heat and electrical resistance, low shrinkage, and mechanical properties, including strength and hardness [12].
Adding fillers may enhance mechanical and physical properties [14].
The thickness of the composite is one of the important factors that affect the permittivity of the samples in this study.
Agarwal, “A study of mechanical properties of epoxy resin in presence of different hardeners,” Technol.
Online since: April 2007
Authors: Zhi Ping Liu, Zheng Guo Jin, Hong Yu Zheng, Jin Li Zhang
High thermal conductivity, along with good electrical and mechanical properties, makes
aluminum nitride a very promising material for electronic packaging and substrates.
But the purity, particle size, particle size distribution, oxygen content and specific surface area of raw materials affect the sinterability and properties of AlN ceramics.
Although powder B and D were made by the same method, they have very different properties.
As the preparation process was same for the four samples, the purity, particle size and its distribution were the predominant factors that influenced the densification.
Thermal properties.
But the purity, particle size, particle size distribution, oxygen content and specific surface area of raw materials affect the sinterability and properties of AlN ceramics.
Although powder B and D were made by the same method, they have very different properties.
As the preparation process was same for the four samples, the purity, particle size and its distribution were the predominant factors that influenced the densification.
Thermal properties.
Online since: December 2012
Authors: Shu Fen Zhou, Xian Wu Hao, Zi Qing Li
Its stiffness is reasonable or not will affect the accuracy of the internal force and deformation.
In practical engineering applications, the combination stiffness is more in line with the mechanical characteristic of the composite structure, and the calculation results are more closer to the actual situation.
The structure stiffness is reasonable or not will directly affect the accuracy of the internal force and deformation.
The properties of these two materials are not fully functioning.
But unified theory considers steel tubular and concrete as a unified unit to explore the impacts of composite material which is more in accordance with the mechanical characteristics of composite structure.
In practical engineering applications, the combination stiffness is more in line with the mechanical characteristic of the composite structure, and the calculation results are more closer to the actual situation.
The structure stiffness is reasonable or not will directly affect the accuracy of the internal force and deformation.
The properties of these two materials are not fully functioning.
But unified theory considers steel tubular and concrete as a unified unit to explore the impacts of composite material which is more in accordance with the mechanical characteristics of composite structure.
Online since: June 2016
Authors: Wahyono Suprapto, Djarot B. Darmadi, Rudy Sunoko, Widia Setiawan
The welding speed does not present a significant effect on the joint mechanical behaviour using the optimized parameters.
The relationship welding parameters, micro hardness, micro structure and tensile properties are investigated to evaluate the quality of the joint.
Two factors are important to get a relatively higher tensile strength.The presence of fine, prefect, without any defect in microstrucure are essential to enhace the strength of the weld Zone. 4.
Roberto Frias, s/n 4200-465 Porto, Portugal [6] Yong Zhao ⇑, Lilong Zhou, Qingzhao Wang, Keng Yan, Jiasheng Zou, 2013, Defects and tensile properties of 6013 aluminum alloy T-joints by friction stir welding, Provincial Key Lab of Advanced Welding Technology, Jiangsu University of Science and Technology, No. 2 Mengxi Road, Zhenjiang 212003, Jiangsu, China
[7] Lei Cui, Xinqi Yang∗, Guang Zhou, Xiaodong Xu, Zhikang Shen, 2012, Characteristics of defects and tensile behaviors on friction stir welded AA6061-T4 T-joints, Tianjin Key Laboratory of Advanced Joining Technology, School of Material Science and Engineering, Tianjin University, Tianjin 300072, People’s Republic of China [8] Xiaopeng Hou, Xinqi Yang ⇑, Lei Cui, Guang Zhou,2013, Influences of joint geometry on defects and mechanical properties of friction stir welded AA6061-T4 T-joints, Tianjin Key Laboratory of Advanced Joining Technology, School of Materials Science and Engineering, Tianjin University, Tianjin 300072, China
The relationship welding parameters, micro hardness, micro structure and tensile properties are investigated to evaluate the quality of the joint.
Two factors are important to get a relatively higher tensile strength.The presence of fine, prefect, without any defect in microstrucure are essential to enhace the strength of the weld Zone. 4.
Roberto Frias, s/n 4200-465 Porto, Portugal [6] Yong Zhao ⇑, Lilong Zhou, Qingzhao Wang, Keng Yan, Jiasheng Zou, 2013, Defects and tensile properties of 6013 aluminum alloy T-joints by friction stir welding, Provincial Key Lab of Advanced Welding Technology, Jiangsu University of Science and Technology, No. 2 Mengxi Road, Zhenjiang 212003, Jiangsu, China
[7] Lei Cui, Xinqi Yang∗, Guang Zhou, Xiaodong Xu, Zhikang Shen, 2012, Characteristics of defects and tensile behaviors on friction stir welded AA6061-T4 T-joints, Tianjin Key Laboratory of Advanced Joining Technology, School of Material Science and Engineering, Tianjin University, Tianjin 300072, People’s Republic of China [8] Xiaopeng Hou, Xinqi Yang ⇑, Lei Cui, Guang Zhou,2013, Influences of joint geometry on defects and mechanical properties of friction stir welded AA6061-T4 T-joints, Tianjin Key Laboratory of Advanced Joining Technology, School of Materials Science and Engineering, Tianjin University, Tianjin 300072, China
Online since: May 2009
Authors: Qing Long An, Ming Chen, X.Y. Wang, H. Xu, Yun Shan Zhang
Introduction
With the development of oil-gas exploitation technology and more complicated geological
conditions for casings working, such as corrosive environment, casings with high comprehensive
mechanical properties are needed in the oil-gas industry [1, 2]. 2Cr13 is a high-strength and high-Cr
stainless steel, which is qualified for the severe working environment as casings material.
Taking into account the mechanical properties of 2Cr13 (Table 2) and the style of tools wear, cutting speed of 100m/min, with a depth of cut of 0.3mm were used.
Table 1 Parameters of the two cutters Type Coat thickness(µm) Rake angle(°) Relief angle(°) Corner radius(mm) T1 3 12 3 0.08 T2 3 0 6 0.12 Table 2 Mechanical properties of 2Cr13 Parameter Value Unit Yield strength 665-758 [N/mm 2] Tensile strength 724 [N/mm 2] Coefficient of extension ≥15 [%] Hardness ≤25.4 [HRC] Finite Element Model Finite Element Mesh and Boundary Conditions.
This model is suitable for modeling cases with high strain, strain rate, strain hardening, and non-linear material properties, which represent the main numerical challenges when modeling metal cutting.
In this study, the key factors that affect the temperature are rake angle and corner radius.
Taking into account the mechanical properties of 2Cr13 (Table 2) and the style of tools wear, cutting speed of 100m/min, with a depth of cut of 0.3mm were used.
Table 1 Parameters of the two cutters Type Coat thickness(µm) Rake angle(°) Relief angle(°) Corner radius(mm) T1 3 12 3 0.08 T2 3 0 6 0.12 Table 2 Mechanical properties of 2Cr13 Parameter Value Unit Yield strength 665-758 [N/mm 2] Tensile strength 724 [N/mm 2] Coefficient of extension ≥15 [%] Hardness ≤25.4 [HRC] Finite Element Model Finite Element Mesh and Boundary Conditions.
This model is suitable for modeling cases with high strain, strain rate, strain hardening, and non-linear material properties, which represent the main numerical challenges when modeling metal cutting.
In this study, the key factors that affect the temperature are rake angle and corner radius.
Online since: February 2013
Authors: Ying Li, Zheng Yong Cheng, Ji Ke Liu, Wen Juan Gu
The factors that impact the waterproofing performance of the impregnant were investigated including the emulsifier amount, the penetration depth and the contact time.
The properties of concrete coated with the composite impregnant were researched.
And the factors that affect the waterproofing performance were also investigated.
The concrete specimen should be cured for 15days after coating at the temperature of 20℃~23℃ and relative humidity of 50%~60% before the waterproofing properties being detected.
Nu¨rnberger, The Corrosion Properties of Stainless Steel Reinforcement, contribution to the Festschrift zu Ehren von Prof.
The properties of concrete coated with the composite impregnant were researched.
And the factors that affect the waterproofing performance were also investigated.
The concrete specimen should be cured for 15days after coating at the temperature of 20℃~23℃ and relative humidity of 50%~60% before the waterproofing properties being detected.
Nu¨rnberger, The Corrosion Properties of Stainless Steel Reinforcement, contribution to the Festschrift zu Ehren von Prof.
Online since: October 2010
Authors: Ren Bo Xu, Xiao Guang Liu, Fu Quan Tu
Flow field analysis and optimization scheme
For separation process two-phase flow, the improtant factor are interactions of mass, momentum and
energy between two phase.
When this situation happened, the separation efficiency will certainly be greatly affected, and the micro-bubbles will increase the difficulty of the second separator and ultimately affect the whole system performance[5].
Owing to the separation system has a wide range of adaptation, it also can apply to degass in the complex structure wells or dirlling process in situation that some related properties unclear.
The paper assumed that the variable factors of mixture are independent and have no influence each other, this is not absolute with the actual situation; further in-depth study should consider the mutual influence of various factors to make simulate conditions closer to the actual situation.
Mechanical Engineer.
When this situation happened, the separation efficiency will certainly be greatly affected, and the micro-bubbles will increase the difficulty of the second separator and ultimately affect the whole system performance[5].
Owing to the separation system has a wide range of adaptation, it also can apply to degass in the complex structure wells or dirlling process in situation that some related properties unclear.
The paper assumed that the variable factors of mixture are independent and have no influence each other, this is not absolute with the actual situation; further in-depth study should consider the mutual influence of various factors to make simulate conditions closer to the actual situation.
Mechanical Engineer.
Online since: April 2014
Authors: Zhan Shan Liu, Hai Chao Yu, Wei Wei An, Xiao Li Zhao
These micro-wrinkles cause unique mechanical, optical, electronic and other properties due to wave interference phenomena [3-4].
Due to its rich chemical composition, ginkgo biloba has many unique properties and a wide range of applications including drug development, ancient climate research, and biogenetics [12-14].
Studies have been carried out to fully characterize the wetting properties of ginkgo leaves by measuring CA and roll-off angle with the deionized water.
Previous study indicated that the main factors affecting the wetting properties were surface roughness and wax [11].
Stafford, Surface wrinkling: A versatile platform for measuring thin-film properties, Advanced Materials, Vol. 23, Issue 3 (2011) pp. 349–368
Due to its rich chemical composition, ginkgo biloba has many unique properties and a wide range of applications including drug development, ancient climate research, and biogenetics [12-14].
Studies have been carried out to fully characterize the wetting properties of ginkgo leaves by measuring CA and roll-off angle with the deionized water.
Previous study indicated that the main factors affecting the wetting properties were surface roughness and wax [11].
Stafford, Surface wrinkling: A versatile platform for measuring thin-film properties, Advanced Materials, Vol. 23, Issue 3 (2011) pp. 349–368
Online since: December 2014
Authors: Andreas Öchsner, Sadegh Imani Yengejeh, Seyedeh Alieh Kazemi
In particular, the effect of imperfections on the mechanical properties, i.e.
In the following, the results of several investigations on the evaluation of the mechanical properties of CNTs are presented.
They pointed out that the effect of chirality on the mechanical properties and failure mode of CNTs is significant.
Later, Lu and Hu [7] conducted a computational simulation in order to investigate the mechanical properties of CNTs.
Lu, Molecular dynamics study on buckling of single-wall carbon nanotube-based intramolecular junctions and influence factors, Comp.
In the following, the results of several investigations on the evaluation of the mechanical properties of CNTs are presented.
They pointed out that the effect of chirality on the mechanical properties and failure mode of CNTs is significant.
Later, Lu and Hu [7] conducted a computational simulation in order to investigate the mechanical properties of CNTs.
Lu, Molecular dynamics study on buckling of single-wall carbon nanotube-based intramolecular junctions and influence factors, Comp.
Online since: October 2011
Authors: Liang Zhao, Meng Su, Yun Chen Miao
With the enhancement of the motion velocity of robots, dynamics factors exert a growing influence on the robot performance.
The affecting factors include: manufacturing errors and assembly errors of mechanical components; mechanism errors in the joint motion transmission; errors of control algorithms; resolution of sensors and encoders; forward and inverse solutions’ calculation errors in kinematics and dynamics etc.
(2) Dynamic error model.As each component of robot has different material and geometric properties, the actual robot system is not an absolute rigid system.
Therefore, rigidity analysis is also an important factor in the accuracy analysis.
Structural error mainly affects the z direction position error of the SCARA manipulator end-executor and the x and y direction orientation error, transmission error mainly affects its x and y direction position error and the z direction orientation error.
The affecting factors include: manufacturing errors and assembly errors of mechanical components; mechanism errors in the joint motion transmission; errors of control algorithms; resolution of sensors and encoders; forward and inverse solutions’ calculation errors in kinematics and dynamics etc.
(2) Dynamic error model.As each component of robot has different material and geometric properties, the actual robot system is not an absolute rigid system.
Therefore, rigidity analysis is also an important factor in the accuracy analysis.
Structural error mainly affects the z direction position error of the SCARA manipulator end-executor and the x and y direction orientation error, transmission error mainly affects its x and y direction position error and the z direction orientation error.