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Online since: October 2011
Authors: Qing Lin Tao, Yi Hu, Zhi Qiang Li, Shan Suo Zheng
The research shows that sectional dimension is the most sensitive factor in the damage of SRC column and the steel ratio takes the second place, and then the strength of concrete is the most insensitive design parameter.
Introduction The structure will be injured by the excitation of seismic wave, and the mechanical property of component is degraded constantly by accumulative effect of damage.
According to the 84 groups experimental data obtained from existing achievements, the multiple linear regression formula between and main parameters which affect the deformation and stiffness of SRC column is expressed as follows: (6) where, , , , andare the strength of concrete, shear span ratio, axial compressive ratio, stirrup volumetric percentage and stirrup characteristic value, separately.
The design parameters and material properties of the original component are given as follows: the calculated height of SRC column is 3600mm, the sectional dimension of component is 800mm×800mm, the size of H steel section is H500×450×30×45, the distribution of longitudinal reinforcement in the component is 1625 and the distribution of stirrup in the component is 10@100; the degree of concrete strength is C45; the grade of H section steel is Q235; the grade of reinforcement is HPB235.
The research achievements show that sectional dimension is the most sensitive factor in the damage of SRC column and the steel ratio takes the second place, and then the strength of concrete is the most insensitive design parameter.
Introduction The structure will be injured by the excitation of seismic wave, and the mechanical property of component is degraded constantly by accumulative effect of damage.
According to the 84 groups experimental data obtained from existing achievements, the multiple linear regression formula between and main parameters which affect the deformation and stiffness of SRC column is expressed as follows: (6) where, , , , andare the strength of concrete, shear span ratio, axial compressive ratio, stirrup volumetric percentage and stirrup characteristic value, separately.
The design parameters and material properties of the original component are given as follows: the calculated height of SRC column is 3600mm, the sectional dimension of component is 800mm×800mm, the size of H steel section is H500×450×30×45, the distribution of longitudinal reinforcement in the component is 1625 and the distribution of stirrup in the component is 10@100; the degree of concrete strength is C45; the grade of H section steel is Q235; the grade of reinforcement is HPB235.
The research achievements show that sectional dimension is the most sensitive factor in the damage of SRC column and the steel ratio takes the second place, and then the strength of concrete is the most insensitive design parameter.
Online since: December 2011
Authors: Xiao Wei Tian, Liang Wang, Chao Wang, Yi Sheng Zhang, Bin Zhu, Hong Qing Li
The hot stamping technology (press hardening) is one of the most successful in producing complex components with superior mechanical properties [2].
Infrared thermography can be used for accurate measurement of temperature due to its three basic advantages:non-contact temperature measurement which has no impact on physical properties of objects under measurement and equipment; fast response and wide range of measurement.
Many factors such as composition, temperature, surface state and measuring direction, could affect the value of emissivity [7].
The future work will focus on the influence on emissivity of other factors.
Analysis of microstructure and mechanical properties of different high strength carbon steels after hot stamping, Journal of Materials Processing Technology. 211(2011) 1117-1125
Infrared thermography can be used for accurate measurement of temperature due to its three basic advantages:non-contact temperature measurement which has no impact on physical properties of objects under measurement and equipment; fast response and wide range of measurement.
Many factors such as composition, temperature, surface state and measuring direction, could affect the value of emissivity [7].
The future work will focus on the influence on emissivity of other factors.
Analysis of microstructure and mechanical properties of different high strength carbon steels after hot stamping, Journal of Materials Processing Technology. 211(2011) 1117-1125
Online since: August 2012
Authors: Yu Qing Yuan, Xue Chan Li, Liu Yang Wang, Tao Guo, Wei Li
A new test-bed machine, named level tension for interlayer, was developed, and its mechanical composition and work principle were also set forth.
Experimental design In order to study working properties and crack resistance of the sandwich material with horizontal force, research group developed a special test beach which is mainly composed of support structure,plane test-bed, load applying and force measuring device.
Moreover, hotting and baking affect on tensile strength.
These two kinds of factors above have been checked out by tests.
Therefore, by direct shear and pull out test, interlaminar shear properties will be studied with the JHY-A material shear apparatus.
Experimental design In order to study working properties and crack resistance of the sandwich material with horizontal force, research group developed a special test beach which is mainly composed of support structure,plane test-bed, load applying and force measuring device.
Moreover, hotting and baking affect on tensile strength.
These two kinds of factors above have been checked out by tests.
Therefore, by direct shear and pull out test, interlaminar shear properties will be studied with the JHY-A material shear apparatus.
Online since: December 2006
Authors: Q.S. Liu, Yu Yong Jiao, C.N. Lin
The downtime, as
we know, is one of the key factors in speeding the tunnel construction.
Table 1 selects some of the evaluated rock properties by TSP measurement at No.8 profile, #7 shaft.
It can be seen that from pile 2351 to 2372, an intact rock is concluded with little change in properties.
Table 1 Computed and evaluated rock properties by TSP measurement (selected results) (YHQW� 1R�� DYH� W�SH� 3RV�W�RQ� 9H�RF�W�� Vp/Vs 3R�VVRQ� 'HQV�W�� 6�HDU� 0RGX�XV� ��3D�� '�QDP�F� �RXQ !
Through interpretation of the testing data, the wave velocities and the rock properties are evaluated, and the locations, sizes of hazardous formations are determined.
Table 1 selects some of the evaluated rock properties by TSP measurement at No.8 profile, #7 shaft.
It can be seen that from pile 2351 to 2372, an intact rock is concluded with little change in properties.
Table 1 Computed and evaluated rock properties by TSP measurement (selected results) (YHQW� 1R�� DYH� W�SH� 3RV�W�RQ� 9H�RF�W�� Vp/Vs 3R�VVRQ� 'HQV�W�� 6�HDU� 0RGX�XV� ��3D�� '�QDP�F� �RXQ !
Through interpretation of the testing data, the wave velocities and the rock properties are evaluated, and the locations, sizes of hazardous formations are determined.
Online since: February 2014
Authors: Xiao Feng Li, Jian Ping Yang, Tao Yang, Xing Ao Li, Min Fen Gu, Jian Bo Yang
These applications are based on its unique properties, such as the rather low thermal decomposition temperature, semiconductor properties and excellent optical qualities [1,2,3].
In order to further understand the 3d-TM doped Cu3N, in this paper, the influence of doping of Mn element on the structural, mechanical, electrical, optical and magnetic properties of copper nitride thin film was systematically studied.
From Table.2, the datum shows that the microhardness of Mn-doped copper nitride (Cu3N:Mnx) films increase with the content of Mn increasing, which indicates that the mechanical properties of copper nitride films could be improved by Mn doping, as consistent with Al-doped films concluded by Li[12].
More works are necessary to find the exact origin and the improvement of ferromagnetic properties.
Properties of Al-doped Copper Nitride Films Prepared by Reactive Magnetron Sputtering, J.
In order to further understand the 3d-TM doped Cu3N, in this paper, the influence of doping of Mn element on the structural, mechanical, electrical, optical and magnetic properties of copper nitride thin film was systematically studied.
From Table.2, the datum shows that the microhardness of Mn-doped copper nitride (Cu3N:Mnx) films increase with the content of Mn increasing, which indicates that the mechanical properties of copper nitride films could be improved by Mn doping, as consistent with Al-doped films concluded by Li[12].
More works are necessary to find the exact origin and the improvement of ferromagnetic properties.
Properties of Al-doped Copper Nitride Films Prepared by Reactive Magnetron Sputtering, J.
Online since: January 2014
Authors: Bogdan Antoszewski
The intensity of scuffing is also affected by such factors as a dynamic increase in temperature or changes in the kinetics of friction pair.
These factors show that scuffing is a very complex process [1,3].
[5] B.Antoszewski, Production, properties and application of laser textured components, Logistyka 6 (2009) 88-100
Radek, B.Antoszewski, Influence of laser treatment on the properties of electro-spark deposited coatings, Kovove Materialy-Metallic Materials 47 (2009) (1) 31-38
Radek, K.Bartkowiak, Performance properties of electro-spark deposited carbide-ceramic coatings modified by laser beam, Physics Procedia 5 (2010) 417-423
These factors show that scuffing is a very complex process [1,3].
[5] B.Antoszewski, Production, properties and application of laser textured components, Logistyka 6 (2009) 88-100
Radek, B.Antoszewski, Influence of laser treatment on the properties of electro-spark deposited coatings, Kovove Materialy-Metallic Materials 47 (2009) (1) 31-38
Radek, K.Bartkowiak, Performance properties of electro-spark deposited carbide-ceramic coatings modified by laser beam, Physics Procedia 5 (2010) 417-423
Online since: June 2025
Authors: Ou Yang Kun, Guan Yu Wang, Ying Qiao Liu, Xue Can Li, Yun Bo Yan
Adding different metal elements to aluminum causes it to change its mechanical properties.
Mechanical properties [19].
Comparisons of mechanical properties between Ti72 and Ti alloys manufactured through additive manufactured: (a) Density; (b) Tensile properties; (c) Specific strength [21].
Researchers are investigating how carbon fiber reinforcement affects the specific strength and mechanical properties of coal and petroleum-based carbon foams.
This approach enabler the use of ceramics with cheaper internal electrodes and without affecting the piezoelectric characteristics.
Mechanical properties [19].
Comparisons of mechanical properties between Ti72 and Ti alloys manufactured through additive manufactured: (a) Density; (b) Tensile properties; (c) Specific strength [21].
Researchers are investigating how carbon fiber reinforcement affects the specific strength and mechanical properties of coal and petroleum-based carbon foams.
This approach enabler the use of ceramics with cheaper internal electrodes and without affecting the piezoelectric characteristics.
Online since: October 2014
Authors: Vera Murgul, Nikolay Vatin, Milja Penić
More detailed way to classify the double skin facades according to the (Figure 1, 2) [5, 6]:
- type of ventilation: natural; enhanced by ventilator; mechanical
- airflow direction: to the top or to the bottom (only in case of mechanical ventilation)
In the cold season exterior vents are closed to allow heat to build up in the cavity spaces, which protects against cold winds while improving the thermal insulating properties of the windows by as 20%.
Together, all those physical factors condition the design of a double skin façade, and must be respected and followed in order to achieve improved comfort of the internal environment and reduce energy consumption.
Vatin: Properties of the wall structures made of autoclaved cellular concrete products on the polyurethane foam adhesive.
- airflow direction: to the top or to the bottom (only in case of mechanical ventilation)
In the cold season exterior vents are closed to allow heat to build up in the cavity spaces, which protects against cold winds while improving the thermal insulating properties of the windows by as 20%.
Together, all those physical factors condition the design of a double skin façade, and must be respected and followed in order to achieve improved comfort of the internal environment and reduce energy consumption.
Vatin: Properties of the wall structures made of autoclaved cellular concrete products on the polyurethane foam adhesive.
Online since: August 2017
Authors: Cătălin Popa, Codruța Sarosi, Marioara Moldovan, Diana Sucala, Stanca Cuc
Nano-fillers have shown outstanding mechanical properties and they are widely used as reinforcing materials associated with polymeric matrices for high performance applications.
The interpretations of SEM analysis images could be done depending on the factors which influenced the infiltration of resin in the etching dentine.
This layer is an interface between dentin and adhesive and the quality of the dental restoration depends greatly on its properties.
The quality and structure of the hybrid layer depends of a few factors.
The hybrid layer thickness was apparently not affected by the smear layer thickness.
The interpretations of SEM analysis images could be done depending on the factors which influenced the infiltration of resin in the etching dentine.
This layer is an interface between dentin and adhesive and the quality of the dental restoration depends greatly on its properties.
The quality and structure of the hybrid layer depends of a few factors.
The hybrid layer thickness was apparently not affected by the smear layer thickness.
Online since: July 2007
Authors: Bing Chun Zhang, Ke Yang, Yi Bin Ren, Hao Wang, Jing Jing Huang
The bio-corrosion properties of the high
pure magnesium in the Hank's solution were investigated in this paper, the results showed that high
pure magnesium had a low corrosion rate and hydrogen release in Hank's solution, when the pH value
of solution was controlled at 7.5, the corrosion rate was under 0.2mm/year, the production of hydrogen
was about 0.15ml/cm2, and if the solution wasn't controlled on pH value, the corrosion rate was about
0.02 mm/year, production of hydrogen was about 0.1ml/cm
2 .
Today, with the advance of alloying technology and metal processing, the properties of magnesium and its alloys have been significantly improved.
The kinetic clotting time test is to determine the extent of the intrinsic clotting factors activated after the material contacting blood.
Our results indicated that the high purity magnesium has better thromboresistant property than 316L steel.
This low corrosion rate will not impact the mechanical integrity of implant magnesium materials and the production of hydrogen in the corrosion process is too tiny to affect the host tissue.
Today, with the advance of alloying technology and metal processing, the properties of magnesium and its alloys have been significantly improved.
The kinetic clotting time test is to determine the extent of the intrinsic clotting factors activated after the material contacting blood.
Our results indicated that the high purity magnesium has better thromboresistant property than 316L steel.
This low corrosion rate will not impact the mechanical integrity of implant magnesium materials and the production of hydrogen in the corrosion process is too tiny to affect the host tissue.