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Online since: July 2014
Authors: Chang Zheng Sun, Rui Xiao Wu, Hai Nan Zhao
When the buildings affected by the fire after earthquake, the inner member may be formed of non-uniform distribution of temperature field, material properties will be change, which leads to the structure bearing capacity decreased.
(1) According the impact of the design specifications of concrete structure [2] and the permanent load factors, which can get the design axial compression ratio is 0.672.
The damage phenomenon is more obvious Ductility Factor.
(2) Use the formula, ductility factor can be got in the table 2.
Mechanical properties of concrete and frost resistance after fire[D].
(1) According the impact of the design specifications of concrete structure [2] and the permanent load factors, which can get the design axial compression ratio is 0.672.
The damage phenomenon is more obvious Ductility Factor.
(2) Use the formula, ductility factor can be got in the table 2.
Mechanical properties of concrete and frost resistance after fire[D].
Online since: February 2020
Authors: Shigenari Hayashi, Laurence Latu-Romain, Somrerk Chandra-ambhorn, Patthranit Wongpromrat
The addition of titanium and niobium can also affect properties of both metal and oxide scale formed at high temperatures.
The addition of the reactive elements could change the growth mechanism of the oxide, thus affecting behaviour and properties of the oxide-steel system e.g. the selective oxidation, the oxidation rate and the scale adhesion.
Thus, the factors which may control the activities of aluminium and reactive elements are expected to affect the optimised concentration of reactive elements.
A2 phase formation decreases high-temperature mechanical properties.
Klöwer, Factors affecting the oxidation behaviour of thin Fe-Cr-Al foils.
The addition of the reactive elements could change the growth mechanism of the oxide, thus affecting behaviour and properties of the oxide-steel system e.g. the selective oxidation, the oxidation rate and the scale adhesion.
Thus, the factors which may control the activities of aluminium and reactive elements are expected to affect the optimised concentration of reactive elements.
A2 phase formation decreases high-temperature mechanical properties.
Klöwer, Factors affecting the oxidation behaviour of thin Fe-Cr-Al foils.
Online since: February 2012
Authors: Wan Shan Wang, Bo Wang, Tian Biao Yu, Guang Hui Zhang, Xue Wei Zhang, Zi Xu Liu
The geometric nonlinearity and large deformation motion of the blade, the rigid motion of the nacelle's yaw process, the elastic deformation of the tower, the complicated and variable aerodynamic load, and other factors must be considered when building a dynamic model[2-3].
In the rotation process of wind wheel, the apex of the tower is affected by the periodic excitation and aerodynamic load.The excitation can cause the tower back-forward vibration[4].
The calculating formula of the resultant velocity W under the wind velocity of , is where a is the inducible factor of the axial flow in the vertical wind turbine rotary surface , is the inducible factor of the tangential flow velocity.
The multi-body dynamic model of the wind turbine's key components can be built by adding material properties and constraints.
Mechanical Design and Manufacturing.
In the rotation process of wind wheel, the apex of the tower is affected by the periodic excitation and aerodynamic load.The excitation can cause the tower back-forward vibration[4].
The calculating formula of the resultant velocity W under the wind velocity of , is where a is the inducible factor of the axial flow in the vertical wind turbine rotary surface , is the inducible factor of the tangential flow velocity.
The multi-body dynamic model of the wind turbine's key components can be built by adding material properties and constraints.
Mechanical Design and Manufacturing.
Online since: June 2020
Authors: Lukman N. Abdulkadir, Muhammad Mukhtar Liman, Khaled Abou-El-Hossein
Introduction
The constant demand for enhanced surface integrity and reduced subsurface damage of optical components formed the driving force for the constant research of machine induced plastic deformation, which is known to strongly affects both physical and mechanical properties of optical products [1].
These selected factors and levels are from combination of selected references [5-7] based on the achieved surface roughness (3. 85 nm), high compressive stress and diamond tool wear resistanc.
Run Factor 1 Factor 2 Factor 3 Response Rake Angle (Degrees) Nose Radius (mm) Feed (mm/min) Ra (nm) 1 0 1. 0 2 1. 8 2 -25 0. 5 12 135 Fig. 1.
Conclusion The ultra-high precision diamond turning study of optical silicon carried out produced 1. 8 nm surface finish when factor levels of 2 mm/min feed rate, 0° rake angle, 15° clearance angle, 17. 5 µm depth of cut, 750 rpm cutting speed and 1. 0 mm nose radius with water as coolant was used.
Mechanical Engineering.
These selected factors and levels are from combination of selected references [5-7] based on the achieved surface roughness (3. 85 nm), high compressive stress and diamond tool wear resistanc.
Run Factor 1 Factor 2 Factor 3 Response Rake Angle (Degrees) Nose Radius (mm) Feed (mm/min) Ra (nm) 1 0 1. 0 2 1. 8 2 -25 0. 5 12 135 Fig. 1.
Conclusion The ultra-high precision diamond turning study of optical silicon carried out produced 1. 8 nm surface finish when factor levels of 2 mm/min feed rate, 0° rake angle, 15° clearance angle, 17. 5 µm depth of cut, 750 rpm cutting speed and 1. 0 mm nose radius with water as coolant was used.
Mechanical Engineering.
Online since: December 2022
Authors: Angela Siner, Yen San Chan, Nurul Fathira Anisa Jimali
Negative absorbance capacity identified for untreated biosorbent could be due to factors affecting the biosorption process that includes factors such as contact time, temperature and shaking speed.
In order to understand the interaction further, kinetic studies are opted for future investigations correlating to the factors affecting biosorption process.
Challabi, et al., Effect of superheated steam treatment on the mechanical properties and dimensional stability of PALF/PLA biocomposite.
Njuguna, Effect of fibre treatment on water absorption and tensile properties of flax/tannin composites.
Zainuddin, et al., Effect of moisture content on physical properties of animal feed pellets from pineapple plant waste.
In order to understand the interaction further, kinetic studies are opted for future investigations correlating to the factors affecting biosorption process.
Challabi, et al., Effect of superheated steam treatment on the mechanical properties and dimensional stability of PALF/PLA biocomposite.
Njuguna, Effect of fibre treatment on water absorption and tensile properties of flax/tannin composites.
Zainuddin, et al., Effect of moisture content on physical properties of animal feed pellets from pineapple plant waste.
Online since: November 2012
Authors: Xiao Dong Pan, Li Hong Yang, Sheng Ye Zhang, Wei Pu, Ming Sun
Considering the property of bedding landslide, the three-dimensional slope stability analysis program based on VBA of ArcGIS is put forward in this paper.
Layer ⑦1 and Layer ⑦2 are very different in mechanical index, and ⑦2 layer pinch out region is larger.
If each layer in the case of good surface drainage, mechanical parameters of the values shown in Table 1.
A slope of groundwater level subject to significantly affect of precipitation.
The calculation does not take into account to further reduce the mechanical parameters of the sliding surface due to water lubrication.
Layer ⑦1 and Layer ⑦2 are very different in mechanical index, and ⑦2 layer pinch out region is larger.
If each layer in the case of good surface drainage, mechanical parameters of the values shown in Table 1.
A slope of groundwater level subject to significantly affect of precipitation.
The calculation does not take into account to further reduce the mechanical parameters of the sliding surface due to water lubrication.
Online since: July 2012
Authors: Ming Xia Yang, Rong Zhou
In this paper, the degumming of corn bracts using chemical method is studied, through different degumming ingredient and technical, find highest degumming rate, at the same time keep some physical mechanical properties of fiber.
We can see results from Table 3, the factors of affecting corn bracts degumming from the primary to the secondary is: B→A→C.
Factors affect analysis.
Trend of factors of influence pretreatment effect are shown in Figure 1.
Table 3 Test scheme and results Factors Column number Test No.
We can see results from Table 3, the factors of affecting corn bracts degumming from the primary to the secondary is: B→A→C.
Factors affect analysis.
Trend of factors of influence pretreatment effect are shown in Figure 1.
Table 3 Test scheme and results Factors Column number Test No.
Online since: March 2011
Authors: Gokhan Celik, Bilgin Kaftanoğlu, Celalettin Karadogan
Each test is repeated three times for three directions with respect to rolling direction to obtain anisotropy properties of the material.
In this study, factors influencing FLD’s are friction, strain rate and thickness and these are examined using the set-up which includes both GOM-ARAMIS optical measurement system and ZWICK/ROELL BUP600 (Fig 4).
Due to cold rolling of sheet metal and plastic deformation, anisotropic properties are changed.
Therefore, formability window of metal sheets depends on plastic deformation and anisotropy properties.
Material data is implemented using HBT results and the anisotropy properties of the sheets are taken from the results of uniaxial tensile tests.
In this study, factors influencing FLD’s are friction, strain rate and thickness and these are examined using the set-up which includes both GOM-ARAMIS optical measurement system and ZWICK/ROELL BUP600 (Fig 4).
Due to cold rolling of sheet metal and plastic deformation, anisotropic properties are changed.
Therefore, formability window of metal sheets depends on plastic deformation and anisotropy properties.
Material data is implemented using HBT results and the anisotropy properties of the sheets are taken from the results of uniaxial tensile tests.
Online since: August 2013
Authors: Li Ming Wu, Zhen Qiang Wang
Fig.1 Finite element model of slope
For the reservoir bank’s slope, soil’s yield strength is mainly produced due to the shear factors ,thus the Mohr-Column criterion is most suitable for the slope stability question’s calculation.
The shear strength parameters of the land’s sliding surface based on the laboratory test and combining the local experience value to get the comprehensive value(the soil test standard value), the shear strength parameters of the underwater part’s sliding surface should use the effective stress intensity index, if the site does not have test conditions, effective stress strength indexes should be determine according to combine the experience value and near the site’s slow shear test value,showing the parameters in Table 1, showing soil mechanical properties parameters in Table 2.
Table 1 Values of calculation parameters rock heavy weigh (kN/m3) natural anti-shear strength Saturate anti-shear strength effective stress intensity index nature saturation C (kPa) j (°) C(kPa) j (°) C’(kPa) j’ (°) Silty clay 21 22.20 25.70 15.00 15.70 12.10 19.00 14.00 Table 2 Indicators of soil physical and mechanical properties item Stati-on Nature heavy weigh kN/m3 natural quick shear Saturatal quick shear Natural residual shear Saturatal residual shear Comp-ression Coeffi-cient MPa-1 Compre-ssion modulus MPa Coeffi- cient of permea- bility cm/s×10-6 C kPa Φ (°) C kPa Φ (°) C kPa Φ (°) C kPa Φ (°) Silty clay Origi-nation 19.3 27.0 16.0 16.0 12.0 15.7 12.1 9.40 10.1 0.60 4.50 7.00 Manzo Reservoir’s Finite Element Analysis Results.
According to adjust rock soil’s different properties parameters, realizing that different water level action’s stability analysis.
Corresponding Author Name: Liming Wu, Email: 58432053@qq.com, Mobile phone: 15223419315 References [1] Huang Bolin,Xu Mo; Analyses of Typical Landslides in Xiangxi River Valley Affected by Impounding[J]; Journal of Disaster Prevention and Mitigation Engineering;2006-3
The shear strength parameters of the land’s sliding surface based on the laboratory test and combining the local experience value to get the comprehensive value(the soil test standard value), the shear strength parameters of the underwater part’s sliding surface should use the effective stress intensity index, if the site does not have test conditions, effective stress strength indexes should be determine according to combine the experience value and near the site’s slow shear test value,showing the parameters in Table 1, showing soil mechanical properties parameters in Table 2.
Table 1 Values of calculation parameters rock heavy weigh (kN/m3) natural anti-shear strength Saturate anti-shear strength effective stress intensity index nature saturation C (kPa) j (°) C(kPa) j (°) C’(kPa) j’ (°) Silty clay 21 22.20 25.70 15.00 15.70 12.10 19.00 14.00 Table 2 Indicators of soil physical and mechanical properties item Stati-on Nature heavy weigh kN/m3 natural quick shear Saturatal quick shear Natural residual shear Saturatal residual shear Comp-ression Coeffi-cient MPa-1 Compre-ssion modulus MPa Coeffi- cient of permea- bility cm/s×10-6 C kPa Φ (°) C kPa Φ (°) C kPa Φ (°) C kPa Φ (°) Silty clay Origi-nation 19.3 27.0 16.0 16.0 12.0 15.7 12.1 9.40 10.1 0.60 4.50 7.00 Manzo Reservoir’s Finite Element Analysis Results.
According to adjust rock soil’s different properties parameters, realizing that different water level action’s stability analysis.
Corresponding Author Name: Liming Wu, Email: 58432053@qq.com, Mobile phone: 15223419315 References [1] Huang Bolin,Xu Mo; Analyses of Typical Landslides in Xiangxi River Valley Affected by Impounding[J]; Journal of Disaster Prevention and Mitigation Engineering;2006-3
Online since: February 2015
Authors: Fan Zhou, Cheng Yu Li
In the paper, what we discussed is the rigid steel column base connection with anchor bolt under biaxial bending, based on Abu Dhabi International Airport project, researching the base plate, anchor bolt and stiffening plate and the influencing factors of the interaction between them, to provide a frame of reference for the rigid steel column base connection’ designed .
Exposed-type column bases are widely used in low-rise building construction all over the world and considerable research efforts have been made to identify the parameters that affect their strength and serviceability.
Fig.4 Bilinear isotropic hardening model Fig.5 Finite model of rigid column base The result of the finite element analysis Mechanical Analysis of the stiffeners.
Fig.6 The stress nephogram of the stiffeners Mechanical Analysis of the stiffeners.
The compression stress of the base plate are not equally distributed, in order to improve the mechanical properties of column base that we need to control the thickness of base plate and the arrangement of the stiffening plates.
Exposed-type column bases are widely used in low-rise building construction all over the world and considerable research efforts have been made to identify the parameters that affect their strength and serviceability.
Fig.4 Bilinear isotropic hardening model Fig.5 Finite model of rigid column base The result of the finite element analysis Mechanical Analysis of the stiffeners.
Fig.6 The stress nephogram of the stiffeners Mechanical Analysis of the stiffeners.
The compression stress of the base plate are not equally distributed, in order to improve the mechanical properties of column base that we need to control the thickness of base plate and the arrangement of the stiffening plates.