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Online since: December 2022
Authors: Shih Huang Chen, Putri Adhitana Paramitha, Le Nguyen Hiep, Cheng Kai Huang, Yi Yang Cheng
One of the parameters affecting bitumen stability is Gaestel colloidal index (CI) [25].
Therefore, five factors were included in the regression analysis.
It indicated that the factors are suitable for analysis.
However, the mechanical properties of the mixture specimen with Fo show inferiority.
Effect of rheology on the bitumen foamability and mechanical properties of foam bitumen stabilised mixes.
Therefore, five factors were included in the regression analysis.
It indicated that the factors are suitable for analysis.
However, the mechanical properties of the mixture specimen with Fo show inferiority.
Effect of rheology on the bitumen foamability and mechanical properties of foam bitumen stabilised mixes.
Online since: November 2011
Authors: Xiang Zhang, Yi Yong Huang, Wei Han, Xiao Qian Chen
The nature of buffer system is a very important factor of determining the dynamic properties for the success of docking operation in space.
Certain FE modeling parameters, such as material properties at high strain rates, depend on experimental data, but since the FE simulations are not based on curve-fits to impact test data, simulation results are not affected by possible experimental error in some trials in a set of test data.
Table 2 gives typical mechanical properties of aluminum.
Table 2 Mechanical properties of aluminum Density (kg∙m-3) 2740 Young’s modulus (Gpa) 71.705 Poisson’s ratio 0.33 Meshing.
International Journal of Mechanical Sciences, 2006, 48: 33-43.
Certain FE modeling parameters, such as material properties at high strain rates, depend on experimental data, but since the FE simulations are not based on curve-fits to impact test data, simulation results are not affected by possible experimental error in some trials in a set of test data.
Table 2 gives typical mechanical properties of aluminum.
Table 2 Mechanical properties of aluminum Density (kg∙m-3) 2740 Young’s modulus (Gpa) 71.705 Poisson’s ratio 0.33 Meshing.
International Journal of Mechanical Sciences, 2006, 48: 33-43.
Online since: June 2011
Authors: Hua Cheng, Zhi Shu Yao, Hai Qing Song
Test study on mechanical characteristic of high strength composite shaft lining of steel and concrete
Zhishu Yao a, Haiqing Song b and Hua Cheng c
College of Civil Eng. and Architecture, Anhui University of Science and Technology,Huainan 232001, China
ayao.zs@163.com ,bhaiqingsong80@163.com , chcheng@aust.edu.cn
Key words: steel, concrete, composite shaft lining, mechanical properties, model test
Abstract.
For the economic and reasonable application of high strength composite shaft lining of steel and concrete, the mechanical characteristic of this kind of structure were studied.
Therefore, this article introduces that the test of the mechanical properties of the high-strength composite shaft lining of double steel and concrete are studied.
According to the Eq.3 and Eq.4, the gain factor of concrete strength is shown in Table 3.
(3) High strength composite shaft lining of double steel and concrete has very high ultimate bearing capacity, the main factors of affecting its bearing capacity have the diameter-thickness ratio of concrete, concrete strength and the thickness of inner and outer steel.
For the economic and reasonable application of high strength composite shaft lining of steel and concrete, the mechanical characteristic of this kind of structure were studied.
Therefore, this article introduces that the test of the mechanical properties of the high-strength composite shaft lining of double steel and concrete are studied.
According to the Eq.3 and Eq.4, the gain factor of concrete strength is shown in Table 3.
(3) High strength composite shaft lining of double steel and concrete has very high ultimate bearing capacity, the main factors of affecting its bearing capacity have the diameter-thickness ratio of concrete, concrete strength and the thickness of inner and outer steel.
Online since: July 2011
Authors: Shigehito Shimizu, Petr Pulpan, Satoshi Wada, Naoya Miyajima, Yasuo Mase, Kazuki Maeda, Koichi Nakashima, Ichiro Fujii
Their piezoelectric properties were measured and discussed a relationship between porosity and piezoelectric properties.
Moreover, another factors became important for sensor application such as accelerator, i.e., sensor’s weight itself.
The dielectric properties of the ceramics were measured at 300 Hz and 100 kHz using LCR meter (Agilent Technologies HP4284A).
Next, all ceramics were sized into 2x2x0.4 mm3, and electric properties were measured.
Summary Porous KN and KN+CB ceramics were prepared in this study, and discussed a relationship between porosity and piezoelectric properties.
Moreover, another factors became important for sensor application such as accelerator, i.e., sensor’s weight itself.
The dielectric properties of the ceramics were measured at 300 Hz and 100 kHz using LCR meter (Agilent Technologies HP4284A).
Next, all ceramics were sized into 2x2x0.4 mm3, and electric properties were measured.
Summary Porous KN and KN+CB ceramics were prepared in this study, and discussed a relationship between porosity and piezoelectric properties.
Online since: December 2016
Authors: Dong Ye He, Xuan Tao Zheng, Jiu Hui Li, Gao Liang Ding
In aluminum alloy sheet metal forming process, annealing treatment can improve the mechanical properties.
It can be concluded that 500°C is the optimal temperature for mechanical properties.
Fig. 3 Mechanical properties predicted by ordinary regression models.
Fig. 4 Mechanical properties of 6016 aluminum at 500°C.
The BHF is a key factor of affecting the whole process of deep drawing which should be systemically investigated.
It can be concluded that 500°C is the optimal temperature for mechanical properties.
Fig. 3 Mechanical properties predicted by ordinary regression models.
Fig. 4 Mechanical properties of 6016 aluminum at 500°C.
The BHF is a key factor of affecting the whole process of deep drawing which should be systemically investigated.
Online since: October 2020
Authors: Olga A. Moskalyuk, Vladimir E. Yudin, Ekaterina S. Tsobkallo
The change in the mechanical properties of oriented composites is determined.
The most important factor determining the properties of dispersion-filled polymers is their adhesion to the surface of a solid (filler), and in the vast majority of cases, the mechanical properties are higher, the smaller the particle size of the dispersed phase.
The mechanical properties of the oriented polymer pomposities were determined from tensile test with used Instron-1122.
It was noted in the Introduction that the most important factor determining the properties of dispersive-filled polymers is their adhesion to the surface of the filler.
Beetz, Mechanical properties of vapour-grown carbon fibres, Journal of Physics D: Applied Physics. 20 (1987) 292-297
The most important factor determining the properties of dispersion-filled polymers is their adhesion to the surface of a solid (filler), and in the vast majority of cases, the mechanical properties are higher, the smaller the particle size of the dispersed phase.
The mechanical properties of the oriented polymer pomposities were determined from tensile test with used Instron-1122.
It was noted in the Introduction that the most important factor determining the properties of dispersive-filled polymers is their adhesion to the surface of the filler.
Beetz, Mechanical properties of vapour-grown carbon fibres, Journal of Physics D: Applied Physics. 20 (1987) 292-297
Online since: May 2011
Authors: Zhe Li, Shao Ji Chen, Jing Xu, Ye Ni Wang, Cui Ping Zhang
It concluded that axial load ratio, load angle, and ratio of the spacing of stirrups and longitudinal reinforcement’s diameter (s/d) are most important factors.
So as to improve its mechanical properties, the section steel is added in the shaped RC columns.
The numerical method was adopted in this article to compile a computer program of full-range nonlinear analysis which can be used for the further research on the mechanical properties of steel reinforced concrete L-shaped columns (SRCLSC) subjected to biaxial eccentric compression.
Factors affecting sectional curvature ductility.
Therefore, the load angle α , axial compression ratio n ,stirrup spacing and the diameter of longitudinal reinforcement ratio s/d are all the major factors affecting the SRCLSC subjected to biaxial eccentric compression, meanwhile ,the curvature ductility coefficient and α, n, s/d meet certain numerical relations.
So as to improve its mechanical properties, the section steel is added in the shaped RC columns.
The numerical method was adopted in this article to compile a computer program of full-range nonlinear analysis which can be used for the further research on the mechanical properties of steel reinforced concrete L-shaped columns (SRCLSC) subjected to biaxial eccentric compression.
Factors affecting sectional curvature ductility.
Therefore, the load angle α , axial compression ratio n ,stirrup spacing and the diameter of longitudinal reinforcement ratio s/d are all the major factors affecting the SRCLSC subjected to biaxial eccentric compression, meanwhile ,the curvature ductility coefficient and α, n, s/d meet certain numerical relations.
Online since: September 2013
Authors: Hao Xu, Ping Wang, Jing Mang Xu
Therefore, the operational reliability of electric switch machine will affect the safety of the train traffic.
The scant displacement is an important constituent part of rail irregularities, which will force the wheel working direction to break, lead to big dynamic response of the train and impact the mechanical properties of locking hook. [9]According to the status of nose rail’s existing scant displacement, it is respectively taken as 0.0mm, 0.5mm, 1.0mm, 1.5mm, 2.0mm.
From the impact of nose rail’s scant displacement on the stress and deformation of lock hook, it mainly affects the first traction point.
The spacer isn’t in touch with the waist of nose rail after conversion due to its installation accuracy, when the train goes through the crossings, dynamic irregularities are generated to influence the mechanical properties of the lock hook. [10]When the nose rail conversion is accomplished, the gap is respectively taken as 0.0mm, 0.5mm, 1.0mm, 1.5mmand 2.0mm.
When a train goes through the crossings, the lateral force acts on the nose rail between two traction points or after the second traction point, the lock hook is forced due to the reverse deformation of nose rail, but it is slow down by the gap between nose rail and spacer so that the stress and deformation of lock hook decreases. ③Influence of lateral stiffness of fastener The lateral stiffness of fastener is one of the most important factors which affect the stress and deformation of nose rail.
The scant displacement is an important constituent part of rail irregularities, which will force the wheel working direction to break, lead to big dynamic response of the train and impact the mechanical properties of locking hook. [9]According to the status of nose rail’s existing scant displacement, it is respectively taken as 0.0mm, 0.5mm, 1.0mm, 1.5mm, 2.0mm.
From the impact of nose rail’s scant displacement on the stress and deformation of lock hook, it mainly affects the first traction point.
The spacer isn’t in touch with the waist of nose rail after conversion due to its installation accuracy, when the train goes through the crossings, dynamic irregularities are generated to influence the mechanical properties of the lock hook. [10]When the nose rail conversion is accomplished, the gap is respectively taken as 0.0mm, 0.5mm, 1.0mm, 1.5mmand 2.0mm.
When a train goes through the crossings, the lateral force acts on the nose rail between two traction points or after the second traction point, the lock hook is forced due to the reverse deformation of nose rail, but it is slow down by the gap between nose rail and spacer so that the stress and deformation of lock hook decreases. ③Influence of lateral stiffness of fastener The lateral stiffness of fastener is one of the most important factors which affect the stress and deformation of nose rail.
Online since: November 2012
Authors: Li Li, Hong Li, Shehzad Khurram, Khurram Asifa
More authentic simulation models include other factors such as; boundary conditions, filler material and pass sequence in multi-pass welding are complex and require greater computational power and CPU time.
A coupled thermo-mechanical simulation model comprises a moving heat source, material deposition, temperature-dependent material properties, phase-change phenomena defined in terms of latent heat release and shrinkage effects, metal plasticity and elasticity, transient heat transfer and mechanical analysis.
Temperature Dependent Material Properties Model Using material mechanical properties at room temperature, except for the yield stress, gives reasonable predictions for the transient temperature fields, residual stress and distortion [34].
Welding volumetric changes and material thermal properties, mainly enthalpy, which are very important due to significant material phase changes, are incorporated into the FE model [38, 39].
Welding speed and geometric shape of weld groove affect the weld bead and penetration.
A coupled thermo-mechanical simulation model comprises a moving heat source, material deposition, temperature-dependent material properties, phase-change phenomena defined in terms of latent heat release and shrinkage effects, metal plasticity and elasticity, transient heat transfer and mechanical analysis.
Temperature Dependent Material Properties Model Using material mechanical properties at room temperature, except for the yield stress, gives reasonable predictions for the transient temperature fields, residual stress and distortion [34].
Welding volumetric changes and material thermal properties, mainly enthalpy, which are very important due to significant material phase changes, are incorporated into the FE model [38, 39].
Welding speed and geometric shape of weld groove affect the weld bead and penetration.
Online since: April 2008
Authors: Waldemar Alfredo Monteiro, S.J. Buso, A. Almeida Filho, R.B. Ferrari
E-mail: física.cch@mackenzie.com.br
Abstract
Al-Mg based alloys have special attention due to the lightness of the material and certain
mechanical properties and reciclability.
Such alloys cause good mechanical properties in moderate mechanical efforts (up to 700 MPa) and good resistance to the corrosion [1-5].
Theoretical Aspects The mechanical properties are influenced by the temperature, deformation rate in the processing and the way as the material is deformed.
The influence of the particles depends on a number of factors and on whether the particles are present during deformation or whether they form during the subsequent anneal before recrystallization occurs [5- 8].
E.: Aluminum Properties and Physical Metallurgy, ASM, USA, 1984
Such alloys cause good mechanical properties in moderate mechanical efforts (up to 700 MPa) and good resistance to the corrosion [1-5].
Theoretical Aspects The mechanical properties are influenced by the temperature, deformation rate in the processing and the way as the material is deformed.
The influence of the particles depends on a number of factors and on whether the particles are present during deformation or whether they form during the subsequent anneal before recrystallization occurs [5- 8].
E.: Aluminum Properties and Physical Metallurgy, ASM, USA, 1984