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Online since: December 2011
Authors: Fang Huang
Mica can improve products electrical properties, heat resistance, cracking resistance and moisture resistance, and in the liquid resin system has good resistance to caking property.
Quartz powder has low thermal expansion and good electrical insulation properties, can improve the dimensional stability and thermal conductivity of the products, improve the dielectric properties of.
In the actual choice of initiator, should consider the following factors; resin mixture in the mold of liquidity, applicable period, responsiveness, product appearance and gloss, monomer residues and products of physical and mechanical properties.
Choose the appropriate color, but also play to improve the product durability, mechanical strength and optical properties of other benefits.
Conclusion Choice of packing should be considered when the products performance, molding process and cost of several factors.
Quartz powder has low thermal expansion and good electrical insulation properties, can improve the dimensional stability and thermal conductivity of the products, improve the dielectric properties of.
In the actual choice of initiator, should consider the following factors; resin mixture in the mold of liquidity, applicable period, responsiveness, product appearance and gloss, monomer residues and products of physical and mechanical properties.
Choose the appropriate color, but also play to improve the product durability, mechanical strength and optical properties of other benefits.
Conclusion Choice of packing should be considered when the products performance, molding process and cost of several factors.
Online since: August 2016
Authors: Jiří Šafka, Luboš Bĕhálek, Jiří Habr, Michal Ackermann, Jiří Bobek, Martin Seidl
The optimal particle size fraction of coir fibres with respect to good final mechanical properties is in the range between 0,5 and 2 mm.
The moisture content in the natural fibres is one of the critical factors that have a strong impact on the interphase quality because of releasing of the water evaporated by the high processing temperatures.
Fig. 8: Printed specimen on 3D printer Easy3DMaker Tab. 2: Parameters settings for 3D printer Easy3DMaker Mechanical properties In order to evaluate the mechanical properties of created specimens the tensile tests were carried out in the laboratory of Technical University of Liberec.
The presence of natural fibres significantly improved the mechanical properties of the tested specimens.
The natural fibre presence in the composite has also a strong impact on the final physical and mechanical properties.
The moisture content in the natural fibres is one of the critical factors that have a strong impact on the interphase quality because of releasing of the water evaporated by the high processing temperatures.
Fig. 8: Printed specimen on 3D printer Easy3DMaker Tab. 2: Parameters settings for 3D printer Easy3DMaker Mechanical properties In order to evaluate the mechanical properties of created specimens the tensile tests were carried out in the laboratory of Technical University of Liberec.
The presence of natural fibres significantly improved the mechanical properties of the tested specimens.
The natural fibre presence in the composite has also a strong impact on the final physical and mechanical properties.
Online since: June 2014
Authors: Li Bao An, Yan Chen
Introduction
Due to their excellent electrical, thermal and mechanical properties, carbon nanotubes (CNTs) have become a candidate of nano materials for micro- and nano-sensors, energy storage and conversion devices, field emission displays, and many other applications [1-3].
However, there exist multiple influencing factors in DEP which include the magnitude of the applied voltage, the concentration of the CNT suspension, the duration of the electric field, the electrical properties of the CNTs and the dielectric liquid, and the geometry and spacing of the electrodes.
Electron beam irradiation on a selected area of the electrode gap will change the electrical properties of the substrate such as permittivity.
Table 1 shows the electrical properties of the components of the DEP system in simulation.
Two factors will affect the permittivity of a dielectric after electron beam irradiation: molecules number N and polarizability .
However, there exist multiple influencing factors in DEP which include the magnitude of the applied voltage, the concentration of the CNT suspension, the duration of the electric field, the electrical properties of the CNTs and the dielectric liquid, and the geometry and spacing of the electrodes.
Electron beam irradiation on a selected area of the electrode gap will change the electrical properties of the substrate such as permittivity.
Table 1 shows the electrical properties of the components of the DEP system in simulation.
Two factors will affect the permittivity of a dielectric after electron beam irradiation: molecules number N and polarizability .
Online since: October 2015
Authors: Mercedes Bonilla, Gonzalo Mármol, Lourdes Soriano, Holmer Savastano, Jordi Payá, M.V. Borrachero, J.M. Monzó
After 10 months ageing, all the mechanical properties were higher when compared to composites using OPC.
Effect on flocculation, retention, drainage and product properties.
Potential Use of Colloidal Silica in Cement Based Composites: Evaluation of the Mechanical Properties.
Physical, chemical and mechanical properties of fluid catalytic cracking catalyst residue (FC3R) blended cements.
Physical, mechanical, and durability properties of gypsum–Portland cement–natural pozzolan blends.
Effect on flocculation, retention, drainage and product properties.
Potential Use of Colloidal Silica in Cement Based Composites: Evaluation of the Mechanical Properties.
Physical, chemical and mechanical properties of fluid catalytic cracking catalyst residue (FC3R) blended cements.
Physical, mechanical, and durability properties of gypsum–Portland cement–natural pozzolan blends.
Online since: March 2008
Authors: Chun An Tang, Tao Xu
The gas pressure in rock mass and its changes in time and space are one of the
basic factors affecting gas recovery and rock failure.
In addition, from Fig.3, it can be seen that although the hydro-mechanical properties of the model are heterogeneous, initial deformation of the rock specimen is elastic and gas flow takes place along tortuous paths defined by the locations of the most permeable elements.
The modelling of progressive failure and associated fluid flow in rock samples with different homogeneity indices were carried out to investigate the hydro-mechanical response including the axial stress-axial strain and permeability evolution, fracture patterns, and flow vectors in rock samples at the scale of usual laboratory samples and gain a better understanding of the factors that control the behavior of gas flow in rocks or rock masses.
In addition, heterogeneity plays an important role in affecting the evolution of permeability in rock.
This evolution generates discrete structures that characterize the overall macroscopic mechanical response and transport properties at the scale of the overall model.
In addition, from Fig.3, it can be seen that although the hydro-mechanical properties of the model are heterogeneous, initial deformation of the rock specimen is elastic and gas flow takes place along tortuous paths defined by the locations of the most permeable elements.
The modelling of progressive failure and associated fluid flow in rock samples with different homogeneity indices were carried out to investigate the hydro-mechanical response including the axial stress-axial strain and permeability evolution, fracture patterns, and flow vectors in rock samples at the scale of usual laboratory samples and gain a better understanding of the factors that control the behavior of gas flow in rocks or rock masses.
In addition, heterogeneity plays an important role in affecting the evolution of permeability in rock.
This evolution generates discrete structures that characterize the overall macroscopic mechanical response and transport properties at the scale of the overall model.
Online since: December 2012
Authors: Dian Guang Ma, Yuan Zhan Wang, Zhi Kai Zhang, Xu Fei Liu
Ship wave is one of the key factors that affect slope stability of inland waterway because of scour and corrosion.
Yong ZHANG[4] evaluated the influence factors of cumulative plastic strain of saturated soft clay with the traffic loading as background.
For the condition of ship wave in inland waterway, the triaxial test research on dynamic properties of shallow layer soil hasn’t been carried out.
Meanwhile, the soil locates in border position of unsaturated soil and saturated soil and has similar engineering properties with upper unsaturated soil.
The safety factors are shown in Table 5.
Yong ZHANG[4] evaluated the influence factors of cumulative plastic strain of saturated soft clay with the traffic loading as background.
For the condition of ship wave in inland waterway, the triaxial test research on dynamic properties of shallow layer soil hasn’t been carried out.
Meanwhile, the soil locates in border position of unsaturated soil and saturated soil and has similar engineering properties with upper unsaturated soil.
The safety factors are shown in Table 5.
Online since: July 2016
Authors: Hao Lei Wang, Chao Zhu
In this paper, a under-construction suspension bridge with span of 1688m is taken as a case-study, Comparative analyses are performed mainly focusing on basic parameters, carrying efficiency of main cable, static behavior and dynamic properties as different high strength cable are adopted in this suspension bridge.
Where = sectional area of main cable; f = sag of cable; l = span of suspension bridge; = allowable stress of cable materials; = increasing coefficient considering the dead weight of protective layer of main cable, hangers, cable clamp and other factors(=1.1 in this study) ; =unit weight of cable materials; = dead weight of stiffened girder, pavement, auxiliary facilities, etc.; =live load.
Distribution of vertical deflection of under live loads stiffened girder under live loads Analysis on the dynamic properties A comparative analysis on dynamic characteristic of NZCB with two types of main cable was performed by using aforementioned FEM model.
This shows that the girder-dominated vibration mode is less affected by main cable, but the cable-involved vibration mode is affected greatly.
[7] S.J.Sun, Study on mechanical properties of the super-span suspension bridge with CFRP cables, Changan University, Xian, China, 2013, pp. 52-68
Where = sectional area of main cable; f = sag of cable; l = span of suspension bridge; = allowable stress of cable materials; = increasing coefficient considering the dead weight of protective layer of main cable, hangers, cable clamp and other factors(=1.1 in this study) ; =unit weight of cable materials; = dead weight of stiffened girder, pavement, auxiliary facilities, etc.; =live load.
Distribution of vertical deflection of under live loads stiffened girder under live loads Analysis on the dynamic properties A comparative analysis on dynamic characteristic of NZCB with two types of main cable was performed by using aforementioned FEM model.
This shows that the girder-dominated vibration mode is less affected by main cable, but the cable-involved vibration mode is affected greatly.
[7] S.J.Sun, Study on mechanical properties of the super-span suspension bridge with CFRP cables, Changan University, Xian, China, 2013, pp. 52-68
Online since: October 2012
Authors: Chun Hu Zhao
In fact, mutual restraint and mutual influence between this three factors, groundwater seepage field and the deformation of the rock stress result in groundwater-solid coupling effect[1].
And the“▽P”reflected the impact of the water seepage field in solid skeleton, its essence is that the pore pressure generated in the fluid flow affected the stress field of the solid skeleton, thereby affecting the deformation of the solid skeleton.
(4)In addition, to determine the safety and critical distance which depends on the fault water ressure, the rock mechanics properties of the control of a combination of factors. the numerical simulation of Fluid-Solid coupling analysis provide favorable conditions for research facilities.
Hydrogelogical and mechanical basics of water inrush from karstic collapse columns in Northern China[J].Journal of china coal society, 2004, 29(2): 182-185.
Hydrogelogical and mechanical basics of water inrush from karstic collapse columns in Northern China[J].Journal of china coal society, 2004, 29(2): 182-185.
And the“▽P”reflected the impact of the water seepage field in solid skeleton, its essence is that the pore pressure generated in the fluid flow affected the stress field of the solid skeleton, thereby affecting the deformation of the solid skeleton.
(4)In addition, to determine the safety and critical distance which depends on the fault water ressure, the rock mechanics properties of the control of a combination of factors. the numerical simulation of Fluid-Solid coupling analysis provide favorable conditions for research facilities.
Hydrogelogical and mechanical basics of water inrush from karstic collapse columns in Northern China[J].Journal of china coal society, 2004, 29(2): 182-185.
Hydrogelogical and mechanical basics of water inrush from karstic collapse columns in Northern China[J].Journal of china coal society, 2004, 29(2): 182-185.
Online since: March 2015
Authors: Hai Bin Li
The performance of automobile drive axle housing structure affects whether the automobile design is successful or not.
So the performance of automobile drive axle housing structure affects whether the automobile design is successful or not.
When builting the drive axle housing geometric model, the axle housing structure has been simplified based on it’s structure and operating characteristics, while maintaining its mechanical properties [2]: (1)In order to simplify modeling and extract middle section in the process of building finite element model and mesh generation based on shell element, the fillet angles of the drive axle housing is simplified to the right one
The number of mesh will affect the calculation accuracy and the scale.
So before determining the number of mesh , we should weigh these two factors.
So the performance of automobile drive axle housing structure affects whether the automobile design is successful or not.
When builting the drive axle housing geometric model, the axle housing structure has been simplified based on it’s structure and operating characteristics, while maintaining its mechanical properties [2]: (1)In order to simplify modeling and extract middle section in the process of building finite element model and mesh generation based on shell element, the fillet angles of the drive axle housing is simplified to the right one
The number of mesh will affect the calculation accuracy and the scale.
So before determining the number of mesh , we should weigh these two factors.
Online since: June 2024
Authors: Khudhayer J. Jadee, Mohammed Ali Nasser, Noor Alhuda Hayder Ali
As a result, the load-deflection properties measured during real testing were very different from those anticipated by the spring equation.
Utilizing mass for improved spring properties and high cyclic strength.
The following factors were taken into account when creating the Belleville spring are; the material type, the thickness of the sheet metal and the details or dimensions of the Belleville spring.
This spring steel is already heat treated, which is used in spiral spring of the sliding doors of shops as shown in Fig. 4, and the tested mechanical properties conducted in the General Company for Engineering Inspection and Qualification are listed in Table 3.
The tested mechanical properties of the sheet metal.
Utilizing mass for improved spring properties and high cyclic strength.
The following factors were taken into account when creating the Belleville spring are; the material type, the thickness of the sheet metal and the details or dimensions of the Belleville spring.
This spring steel is already heat treated, which is used in spiral spring of the sliding doors of shops as shown in Fig. 4, and the tested mechanical properties conducted in the General Company for Engineering Inspection and Qualification are listed in Table 3.
The tested mechanical properties of the sheet metal.