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Online since: November 2011
Authors: Qiang Fu, Hong Zhao, Nan Cao, Jin Jun Li
The geometric model and detail design of the planar target, which is one of the main factors affecting the system’s measuring stability and accuracy, are presented.
Such as global positioning system (GPS) [1], mechanical arm localization system, ultrasonic localization system, electromagnetism location system and optical location system.
Usually this process can be accomplished by mechanical or self-calibration method.
Mechanical method needs related equipments, and the measurement process is usually tedious and time-consuming.
According to the properties of rigid motion, the coordinates of the marked points and the tip remain same in.
Such as global positioning system (GPS) [1], mechanical arm localization system, ultrasonic localization system, electromagnetism location system and optical location system.
Usually this process can be accomplished by mechanical or self-calibration method.
Mechanical method needs related equipments, and the measurement process is usually tedious and time-consuming.
According to the properties of rigid motion, the coordinates of the marked points and the tip remain same in.
Online since: January 2013
Authors: Xuan Sun
Possible factors which causes fracture of cubic hinge sleeve was analyzed preliminary.
In order to smooth mesh and without affecting the accuracy of the condition, the model is simplified, which is included by 2 points.
After discussion with experts, the reason of fracture in the hole and bottom of cubic hinge sleeve maybe include two factors.
Journal of Mechanical Strength.
China Mechanical Engineering.
In order to smooth mesh and without affecting the accuracy of the condition, the model is simplified, which is included by 2 points.
After discussion with experts, the reason of fracture in the hole and bottom of cubic hinge sleeve maybe include two factors.
Journal of Mechanical Strength.
China Mechanical Engineering.
Online since: August 2009
Authors: Qiang Zhang, G.H. Wu, Mao Qiang Duan, X. Chen, Xiao Li Huang
All the results indicate that shape
of shield materials affects the MSE properties much and the MSE properties of shield with square and
circular shape with 3mm in depth are 39.3 and 53.5 dB, respectively.
In this paper, the Maxwell 2D software is introduced to study the magnetic shielding effectiveness (MSE) of iron plate, meanwhile, factors that influencing the MSE of iron plate is also investigated in order to provide another reference for magnetic shielding simulation.
Fig.1 Model of Maxwell 2D on magnetic shielding (left) and the uniform magnetic field where materials located (right) Results and discussion The simulated magnetic shielding effectiveness of shield with square and circular shape with 3mm depth is listed in Table 1. it shows that shape of shield materials affects the MSE properties much and the MSE properties of shield with square and circular shape with 3mm in depth are 39.3 and 53.5 dB, respectively.
That is, the increase of side length of magnetic shield will lead to the decrease of MSE properties of iron plate.
Lu:Journal of Mechanical strength.
In this paper, the Maxwell 2D software is introduced to study the magnetic shielding effectiveness (MSE) of iron plate, meanwhile, factors that influencing the MSE of iron plate is also investigated in order to provide another reference for magnetic shielding simulation.
Fig.1 Model of Maxwell 2D on magnetic shielding (left) and the uniform magnetic field where materials located (right) Results and discussion The simulated magnetic shielding effectiveness of shield with square and circular shape with 3mm depth is listed in Table 1. it shows that shape of shield materials affects the MSE properties much and the MSE properties of shield with square and circular shape with 3mm in depth are 39.3 and 53.5 dB, respectively.
That is, the increase of side length of magnetic shield will lead to the decrease of MSE properties of iron plate.
Lu:Journal of Mechanical strength.
Online since: October 2008
Authors: Aldo Roberto Boccaccini, Johann Cho
a
johann.cho@imperial.ac.uk ba.boccaccini@imperial.ac.uk
Keywords: ceramic matrix composites, carbon nanotubes, mechanical properties, sintering,
glasses
Abstract Carbon nanotubes (CNTs) are promising reinforcing elements for structural composites
due to their remarkable mechanical properties.
However, it should be noted that the surfactants may introduce undesirable impurities which can affect the sintering process and/or the as-produced composite properties.
Mechanical properties and relevant toughening mechanisms A summary of mechanical properties achieved with CNT/inorganic matrix composites, as reported in the literature, is presented in Table 1.
Table 1 Overview of mechanical properties of CNT/inorganic matrix composites Matrix material C�T content Processing routes Investigated properties [(%) indicates property improvement compared to monolith] Year [Ref.]
However, it should be pointed out that the real value of CNTs lies in their range and breadth of properties, which include mechanical, electrical and thermal properties.
However, it should be noted that the surfactants may introduce undesirable impurities which can affect the sintering process and/or the as-produced composite properties.
Mechanical properties and relevant toughening mechanisms A summary of mechanical properties achieved with CNT/inorganic matrix composites, as reported in the literature, is presented in Table 1.
Table 1 Overview of mechanical properties of CNT/inorganic matrix composites Matrix material C�T content Processing routes Investigated properties [(%) indicates property improvement compared to monolith] Year [Ref.]
However, it should be pointed out that the real value of CNTs lies in their range and breadth of properties, which include mechanical, electrical and thermal properties.
Online since: February 2011
Authors: Bin Wei, Yan Han, Xue Hui Zhao, Zhen Quan Bai
This article analyzed and summarized the dangers and the factors of sour gas corrosion.
Factors influenced hydrogen sulfide stress corrosion cracking Factors influenced hydrogen sulfide stress corrosion cracking includes two sides: environment factors and material factors. 4.1 Environmental factors Environment factors mainly includes: H2S concentration, pH value, temperature and working stress. 1)H2S concentration:The total amount of hydrogen in the alloy increased with the increase of H2S concentration, shorten the time of occurrence of hydrogen sulfide stress cracking.
Besides the factors above, CO2 concentration, Cl- concentration and types of additives, such as types of drilling fluid, types of inhibitor are likely to affect the SSC sensitivity of the material. 4.2 Material factors Material factors mainly includes: hardness, microstructure, chemical composition, cold work and so on. 1) Hardness: Hardness is an important factor of metallic materials’ SSC.
Material factors are basic factors to affecting the hydrogen sulfide stress corrosion cracking.
Table 3 was the properties of sour service drill pipe [13], these drill pipe have a significant breakthrough in the microstructure and hardness performance.
Factors influenced hydrogen sulfide stress corrosion cracking Factors influenced hydrogen sulfide stress corrosion cracking includes two sides: environment factors and material factors. 4.1 Environmental factors Environment factors mainly includes: H2S concentration, pH value, temperature and working stress. 1)H2S concentration:The total amount of hydrogen in the alloy increased with the increase of H2S concentration, shorten the time of occurrence of hydrogen sulfide stress cracking.
Besides the factors above, CO2 concentration, Cl- concentration and types of additives, such as types of drilling fluid, types of inhibitor are likely to affect the SSC sensitivity of the material. 4.2 Material factors Material factors mainly includes: hardness, microstructure, chemical composition, cold work and so on. 1) Hardness: Hardness is an important factor of metallic materials’ SSC.
Material factors are basic factors to affecting the hydrogen sulfide stress corrosion cracking.
Table 3 was the properties of sour service drill pipe [13], these drill pipe have a significant breakthrough in the microstructure and hardness performance.
Online since: May 2011
Authors: Hong Xiang Zhu, Nan Nan Xia, Shuang Fei Wang, Hui He, Ying Hui Wang
The product of emulsion polymerization with St and BA has a good comprehensive properties and a certain sizing effectiveness.
Due to its presence in the latex, it produces a porous film, which deteriorates the product’s properties in the adhesive force, waterproof, gloss and electric performance.
Reaction time on properties of emulsion From Figure 1 we can see: With the increase of reaction time, the solid content did not change significantly.
For yield, four factors of the R value is no big difference.
The product of emulsion polymerization using St and BA has a good comprehensive properties and a certain sizing effectiveness.
Due to its presence in the latex, it produces a porous film, which deteriorates the product’s properties in the adhesive force, waterproof, gloss and electric performance.
Reaction time on properties of emulsion From Figure 1 we can see: With the increase of reaction time, the solid content did not change significantly.
For yield, four factors of the R value is no big difference.
The product of emulsion polymerization using St and BA has a good comprehensive properties and a certain sizing effectiveness.
Online since: January 2011
Authors: Li Liu, Li Wei Xu, Y.D Huang
The effect of physical properties on the interfacial adhesion properties of fiber reinforced nylon66 composites have been investigated in this paper.
Thus, the interphase in fiber-reinforced composites plays a very important role in determining the composite mechanical properties.The interphase is a very small region over which the mechanical and physical properties change from the bulk properties of one component to the bulk properties of the other component (polymer).
The properties of the interphase can significantly affect the load transfer characteristics and the macroscopic mechanical response of the composite under external loading.
It is well recognized that dispersion, wetting and interaction between fiber and polymeric matrix are critical factors in designing fiber reinforced polymer composites[4].
Enhancement of the mechanical properties.
Thus, the interphase in fiber-reinforced composites plays a very important role in determining the composite mechanical properties.The interphase is a very small region over which the mechanical and physical properties change from the bulk properties of one component to the bulk properties of the other component (polymer).
The properties of the interphase can significantly affect the load transfer characteristics and the macroscopic mechanical response of the composite under external loading.
It is well recognized that dispersion, wetting and interaction between fiber and polymeric matrix are critical factors in designing fiber reinforced polymer composites[4].
Enhancement of the mechanical properties.
Online since: October 2011
Authors: Zhi Hui Hu, Ji Quan Hu
On the question of fatigue and degradation caused by bending-over-sheaves, the available research [6,7] mainly focus on the effect of tension, diameter ratio of sheave to wire rope and contact conditions of wire rope with sheave on bending fatigue life, the factors that may bring wire rope mechanical damage, such as the fleet angle and angle of wrap and so on, still need further study.
Mechanical Damage of Wire Ropes When wire rope is bending over sheaves, in addition to the fatigue damage caused by bending, mechanical damage will be affected by fleet angle and angle of wrap as the structural specificity of wire ropes, the damage results in degradation of the quality and influence of the fatigue life of wire ropes. 1) Damage caused by fleet angle In general lifting mechanical design specification, the fleet angle is limited when wire rope is running on and off sheaves.
Angle of wrap can also cause damage to wire rope, and the size of angle affect the degree of damage, thus affect the fatigue life of wire ropes.
The damage mechanism of angle of wrap is related to the geometric properties of wire rope.
When the wire rope is bending over sheaves, the wire will be damaged and the shape of wire cross-section will change because of the impact of various factors such as fleet angle and angle of wrap, the contact and extrusion between wires and between the wire surface and the groove surface.
Mechanical Damage of Wire Ropes When wire rope is bending over sheaves, in addition to the fatigue damage caused by bending, mechanical damage will be affected by fleet angle and angle of wrap as the structural specificity of wire ropes, the damage results in degradation of the quality and influence of the fatigue life of wire ropes. 1) Damage caused by fleet angle In general lifting mechanical design specification, the fleet angle is limited when wire rope is running on and off sheaves.
Angle of wrap can also cause damage to wire rope, and the size of angle affect the degree of damage, thus affect the fatigue life of wire ropes.
The damage mechanism of angle of wrap is related to the geometric properties of wire rope.
When the wire rope is bending over sheaves, the wire will be damaged and the shape of wire cross-section will change because of the impact of various factors such as fleet angle and angle of wrap, the contact and extrusion between wires and between the wire surface and the groove surface.
Online since: February 2014
Authors: Qian Tan, Ying Min Li, Chuan Guo Jia
The mechanical properties, deformation and damage form of embedded parts were investigated.Experimental results indicate that it has good mechanical properties and favorable deformation performance under tensile and shear loads in normal work.
But its mechanical properties have no testing and passing any inspection of project, which will bring a lot of limitations and uncertainty in application.
In this paper, in order to figure out the mechanical properties, deformation and failure pattern of channel embedded part, experimental research were carried out.
So as to prevent concrete from entering into the channel and affecting the test proceeding.
It has good mechanical properties and favorable deformation performance under tensile and shear loads in normal work.
But its mechanical properties have no testing and passing any inspection of project, which will bring a lot of limitations and uncertainty in application.
In this paper, in order to figure out the mechanical properties, deformation and failure pattern of channel embedded part, experimental research were carried out.
So as to prevent concrete from entering into the channel and affecting the test proceeding.
It has good mechanical properties and favorable deformation performance under tensile and shear loads in normal work.
Online since: March 2012
Authors: Sheng Hua Lv, Qiang Cao, Di Li
PCs is a new kind of high performance water-reducing agents and has many excellent properties.
Therefore, the excellent properties of PCs would be obtained maintaining molar ratios of n(AA) : n(APEG) was 4.0.
That is because the properties of PCs was affected by the molecular weight of PCs, and the dosage of the initiator would affect molecular weight of PCs.
Sachsenhauser, Experimental determination of the thermodynamic parameters affecting the adsorption behavior and dispersion effectiveness of PCSE superplasticizers, Cement and Concrete Research, 40(2005) 699-709
Wu, Factors influencing properties of phosphate cement-based binder for rapid repair of concrete, Cement and Concrete Research. 29 (1999) 389-396.
Therefore, the excellent properties of PCs would be obtained maintaining molar ratios of n(AA) : n(APEG) was 4.0.
That is because the properties of PCs was affected by the molecular weight of PCs, and the dosage of the initiator would affect molecular weight of PCs.
Sachsenhauser, Experimental determination of the thermodynamic parameters affecting the adsorption behavior and dispersion effectiveness of PCSE superplasticizers, Cement and Concrete Research, 40(2005) 699-709
Wu, Factors influencing properties of phosphate cement-based binder for rapid repair of concrete, Cement and Concrete Research. 29 (1999) 389-396.