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Online since: November 2012
Authors: Yuan Qiang Tan, Rui Tao Peng, Fang Lu, Xin Zi Tang
Some other researchers attempt to figure out this problem from machining processing parameters optimization point of view [5], however the factors which affect residual stress are anfractuous, it is almost impossible to stably control residual stress distribution just only taking tool and machining parameters into account.
Material Properties.
The main mechanical properties of GCr15 steel are given in Table 2.
Table 1 Constants of the Johnson-Cook constitutive model A [Mpa] B [Mpa] n C m 1682 396 0.379 0.021 1.21 Table 2 Mechanical properties of the GCr15 steel Density [kg×m-3] Young modulus [Gpa] Conductivity [W×m-1×K-1] Specific Heat [J×kg-1×K-1] 7827 210 46.6 475 Chip Formation Method.
Obviously, the prestress affect the residual stress component σ11 significantly, however it shows an indistinctive effect on the other two residual stress components.
Material Properties.
The main mechanical properties of GCr15 steel are given in Table 2.
Table 1 Constants of the Johnson-Cook constitutive model A [Mpa] B [Mpa] n C m 1682 396 0.379 0.021 1.21 Table 2 Mechanical properties of the GCr15 steel Density [kg×m-3] Young modulus [Gpa] Conductivity [W×m-1×K-1] Specific Heat [J×kg-1×K-1] 7827 210 46.6 475 Chip Formation Method.
Obviously, the prestress affect the residual stress component σ11 significantly, however it shows an indistinctive effect on the other two residual stress components.
Online since: October 2014
Authors: Serina Ng, Linn Ingunn Christie Sandberg, Bjørn Petter Jelle
Improved insulation properties may be achieved by incorporation of thermal insulation materials, whereby increasing the loading would improve the overall insulating properties.
In general, the mechanical properties of concrete are enhanced by a reduction in water/cement ratio (w/c) or improvement in packing densities.
Mechanical strength properties of cured AIC samples were measured according to DIN EN 196-1 standard [6].
Results and discussion Physical properties of AIM samples.
The physical properties of the cured AIM samples after 28 days were analysed first.
In general, the mechanical properties of concrete are enhanced by a reduction in water/cement ratio (w/c) or improvement in packing densities.
Mechanical strength properties of cured AIC samples were measured according to DIN EN 196-1 standard [6].
Results and discussion Physical properties of AIM samples.
The physical properties of the cured AIM samples after 28 days were analysed first.
Online since: October 2015
Authors: M.I. Maksud, Noor Azlina Rejab, M.N. Nodin, S. Hassan, Mohd Sallehuddin Yusof
Subtrate and ink properties play the main role to achieve the best quality of printing which has solid line width of below 20µm.
The knowledge gap in contact mechanism, ink spreading mechanism and other important factors are still under further development.
The properties of the screen-printed vertical graphene film were obtained with low turn on field, high maximum current density, and large field enhancement factor.
From the printed image patterns observation, the factors which influence the defected patterns will include the ink properties, substrates, machine processes parameters and interfacial phenomena between the rolling contact [2].
Dujardin, "Production, properties and potential of graphene," Carbon, vol. 48, pp. 2127-2150, 2010.
The knowledge gap in contact mechanism, ink spreading mechanism and other important factors are still under further development.
The properties of the screen-printed vertical graphene film were obtained with low turn on field, high maximum current density, and large field enhancement factor.
From the printed image patterns observation, the factors which influence the defected patterns will include the ink properties, substrates, machine processes parameters and interfacial phenomena between the rolling contact [2].
Dujardin, "Production, properties and potential of graphene," Carbon, vol. 48, pp. 2127-2150, 2010.
Online since: August 2014
Authors: Muhd Fadhil Nuruddin, F.A. Memon
This paper explores to produce SCGC made with locally available materials by examining its mechanical properties.
Test results showed that the mechanical properties of SCGC are competitive with those of OPC-based conventional concrete.
This paper reports the results of the tests carried out to assess the basic mechanical properties of fly ash-based SCGC.
Hardened Properties 4.2.1.
[17] Khale, D., Chaudhary, R., Mechanism of geopolymerization and factors influencing its development: A review, Journal of Material Science, vol. 42, no. 3, 2007, pp. 729–746
Test results showed that the mechanical properties of SCGC are competitive with those of OPC-based conventional concrete.
This paper reports the results of the tests carried out to assess the basic mechanical properties of fly ash-based SCGC.
Hardened Properties 4.2.1.
[17] Khale, D., Chaudhary, R., Mechanism of geopolymerization and factors influencing its development: A review, Journal of Material Science, vol. 42, no. 3, 2007, pp. 729–746
Online since: October 2010
Authors: Shu Hui Li, Wei Gang Zhang, Zhi Gang Wu
Table 1 The mechanical property of tube blanks.
The mechanical property of tube blanks is listed in Table 1.
There are a large number of factors that affect the quality of the products in the hydropiercing process including technical, material and geometrical parameters.
According to Eq. 7 corresponding to the roll-over depth, only the first coefficient (internal pressure) affects apparently and the effects of the other three factors are very small.
Then the interaction of these two factors should be researched.
The mechanical property of tube blanks is listed in Table 1.
There are a large number of factors that affect the quality of the products in the hydropiercing process including technical, material and geometrical parameters.
According to Eq. 7 corresponding to the roll-over depth, only the first coefficient (internal pressure) affects apparently and the effects of the other three factors are very small.
Then the interaction of these two factors should be researched.
Online since: March 2008
Authors: Xiao Qiang Pan, Jian Jun Wang
Thus, the factors of
atmospheric corrosion are complex.
In detail, there are the following factors that affect atmospheric corrosion, i.e., relative humidity, temperature, difference in temperature, acerbity, alkali, salt, corrosive gases, solid grains, and state of metal surface and so on.
And the corrosion processes of multi-factors should be simulated by computers.
Corrosion process relates to combination of materials and their environmental factors.
Institute of Mechanical Engineers, (1986) [2] SUN Yue, HU Jing.
In detail, there are the following factors that affect atmospheric corrosion, i.e., relative humidity, temperature, difference in temperature, acerbity, alkali, salt, corrosive gases, solid grains, and state of metal surface and so on.
And the corrosion processes of multi-factors should be simulated by computers.
Corrosion process relates to combination of materials and their environmental factors.
Institute of Mechanical Engineers, (1986) [2] SUN Yue, HU Jing.
Online since: April 2012
Authors: Aniruddha Ghosh, Somnath Chattopadhyaya, N.K. Singh
Singh3,c
1Assistant Professor in WBGS, Dept. of Mechanical Engineering, Govt.
The submerged-arc welding (SAW) process is popular because of its ability to match the chemistry and physical properties of the base material.
Experimental Procedure & Results The experiments were conducted as per the design matrix randomly to avoid errors due to noise factors.
Weld Bead Width (mm) (Experimental Values) Weld Bead Width (mm) (Predicted Values) % error 17.96 21.01 17 21.90 25.84 18 21.00 25.20 20 30.92 36.79 19 13.94 15.89 14 20.12 24.14 20 15.90 18.60 17 22.66 26.97 19 Conclusion This type of numerical investigation is made to estimate three dimensional transient heat conduction fields in semi infinite metallic solid because surface heat transfer strongly affected the temperature distribution in the welded pates.
These newly found solutions also will be helpful to predict heat affected zone, weld bead parameters etc.
The submerged-arc welding (SAW) process is popular because of its ability to match the chemistry and physical properties of the base material.
Experimental Procedure & Results The experiments were conducted as per the design matrix randomly to avoid errors due to noise factors.
Weld Bead Width (mm) (Experimental Values) Weld Bead Width (mm) (Predicted Values) % error 17.96 21.01 17 21.90 25.84 18 21.00 25.20 20 30.92 36.79 19 13.94 15.89 14 20.12 24.14 20 15.90 18.60 17 22.66 26.97 19 Conclusion This type of numerical investigation is made to estimate three dimensional transient heat conduction fields in semi infinite metallic solid because surface heat transfer strongly affected the temperature distribution in the welded pates.
These newly found solutions also will be helpful to predict heat affected zone, weld bead parameters etc.
Online since: December 2011
Authors: Gao Chun Li, Yu Feng Wang, Ai Min Jiang, Xiang Yi Liu
These constitutive models help us in realizing the mechanical behavior of propellant.
Their mechanical behavior depends on a number of factors, which including binder, particles, interfacial strength, the loading mode and the spatial particle distribution.
Thus, a micromechanical analysis is needed to understand the influence of these factors in the mechanical behavior of propellant.
Constitutive models To capture the mechanical behavior of the propellant, it is crucial to have accurate experimental data of its constituent properties.
Cohesive interface properties adopted in this study are ,, .
Their mechanical behavior depends on a number of factors, which including binder, particles, interfacial strength, the loading mode and the spatial particle distribution.
Thus, a micromechanical analysis is needed to understand the influence of these factors in the mechanical behavior of propellant.
Constitutive models To capture the mechanical behavior of the propellant, it is crucial to have accurate experimental data of its constituent properties.
Cohesive interface properties adopted in this study are ,, .
Online since: August 2020
Authors: Mariy Shyogoleva, Olena Sevidova, Iryna Stepanova, Alexey Vasilchenko
The main disadvantage of all metal products is their manifestation of electrochemical properties and participation in electrochemical processes which can flow into the oral cavity and provoke galvanoses, especially for their joint use.
A common drawback, like all other metals, including and noble, used in dentistry, is manifestation of their electrochemical properties and participation in electrochemical processes that can occur in the oral cavity and cause galvanosis.
Its values depend on the chemical composition of the metal inclusion, the state of the surface (roughness, the presence of passivating oxide or salt films), internal stresses (compressive or tensile) due to mechanical and thermal factors in the manufacturing process of dental products.
On the other hand, the composition of the oral fluid and its acidity (pH) affect the values of electrode potentials.
All these factors negatively affect the quality of the protective passive film.
A common drawback, like all other metals, including and noble, used in dentistry, is manifestation of their electrochemical properties and participation in electrochemical processes that can occur in the oral cavity and cause galvanosis.
Its values depend on the chemical composition of the metal inclusion, the state of the surface (roughness, the presence of passivating oxide or salt films), internal stresses (compressive or tensile) due to mechanical and thermal factors in the manufacturing process of dental products.
On the other hand, the composition of the oral fluid and its acidity (pH) affect the values of electrode potentials.
All these factors negatively affect the quality of the protective passive film.
Online since: August 2015
Authors: Hossein Hosseini-Toudeshky, Maryam Jamalian
Micromechanical damage simulation to obtain effect of coarse grains distribution on mechanical properties of bimodal AL using 2D XFEM
H.
These analyses are used to predict and investigate the effect of coarse grain distribution on the mechanical properties such as global stress-strain behavior and pattern of crack growths for bulk metal.
Microstructural model preparation Material properties.
For material assignment, the material properties achieved from experiments containing 100% CG and UFG were used respectively.
By examining these three RVEs, one can discover the role of coarse grains in improving the material properties.
These analyses are used to predict and investigate the effect of coarse grain distribution on the mechanical properties such as global stress-strain behavior and pattern of crack growths for bulk metal.
Microstructural model preparation Material properties.
For material assignment, the material properties achieved from experiments containing 100% CG and UFG were used respectively.
By examining these three RVEs, one can discover the role of coarse grains in improving the material properties.