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Online since: January 2012
Authors: Somasundaram Saravanan, K. Raghukandan
Influence of Material Properties in Explosive
Cladding of Dissimilar Metals
S.
The physical properties of metals remain fairly constant and are not affected by any outside pressure or force.
In dissimilar metals having wide difference in physical and mechanical properties, tensile stress produced is quite high.
By introducing a compatible interlayer the time available for solidification is reduced by a factor 4 depending on the properties and thickness of interlayer.
The microstructure of explosive welded joint sand their mechanical properties J Mater Science (2010) [7] Vi.
The physical properties of metals remain fairly constant and are not affected by any outside pressure or force.
In dissimilar metals having wide difference in physical and mechanical properties, tensile stress produced is quite high.
By introducing a compatible interlayer the time available for solidification is reduced by a factor 4 depending on the properties and thickness of interlayer.
The microstructure of explosive welded joint sand their mechanical properties J Mater Science (2010) [7] Vi.
Online since: June 2011
Authors: M.S.J. Hashmi, Muhammad M. Morshed, Stephen M. Daniels
Introduction
The use of coatings to protect a substrate is now a well-established technique to improve the mechanical and tribological properties of components in many engineering applications.
The neutral axis of the rectangular cross section under the bending load will be shifted because of their different material properties.
Along with pressure variables, the cohesive strength values calculated by the beam theory method are inclusive of the effect due to residual stresses induced during film growth and the residual stress is a predominant factor affecting the cohesive strength of the coating.
Compressive stress adds up to the cohesive strength of the coating and is beneficial in enhancing the surface properties and interfacial strength.
Table 1 Properties of DLC films, which were deposited with 100% C2H2 process gas and with different deposition parameters.
The neutral axis of the rectangular cross section under the bending load will be shifted because of their different material properties.
Along with pressure variables, the cohesive strength values calculated by the beam theory method are inclusive of the effect due to residual stresses induced during film growth and the residual stress is a predominant factor affecting the cohesive strength of the coating.
Compressive stress adds up to the cohesive strength of the coating and is beneficial in enhancing the surface properties and interfacial strength.
Table 1 Properties of DLC films, which were deposited with 100% C2H2 process gas and with different deposition parameters.
Online since: July 2014
Authors: Wei Cong, Shi Ping Song
Based on Betz Theory,Simplified Theoretical Model assumes that wind turbine works under ideal conditions ignoring axial, circumferential interference factors and vortex distribution of blades.
Glauert Theoretical Model founded vortex system of the wind wheel considering axial and circumferential interference factors.
As the moment arm of airfoils in blade root is too small to make enough contribution to the output torque of wind wheel, the property of wind turbine is less affected by blade root, where the convenience of manufacturing and strength is mainly considered.
Journal of Mechanical Engineering, 2010, 46(3): 131-134
Mechanical & Electrical Engineering Magazine, 2006, 23(4): 37-40
Glauert Theoretical Model founded vortex system of the wind wheel considering axial and circumferential interference factors.
As the moment arm of airfoils in blade root is too small to make enough contribution to the output torque of wind wheel, the property of wind turbine is less affected by blade root, where the convenience of manufacturing and strength is mainly considered.
Journal of Mechanical Engineering, 2010, 46(3): 131-134
Mechanical & Electrical Engineering Magazine, 2006, 23(4): 37-40
Online since: October 2012
Authors: Lang Wu, Bing Yan, Bin Lei
Introduction
The hydration of cement and the accompanying phenomena such as heat generation, strength development and shrinkage are the results of interrelated chemical, physical and mechanical processes.
In the past, several interesting concepts have been proposed to simulating the hydration and microstructure development of concrete and the research of macroscopic physics mechanical property.
In addition, cement hydration process are impacted by several factors, such as water-cement ratio, chemical composition of cement, fineness, curing temperature and humidity, so it is necessary to build the hydration microcosmic model.
In the past research, many researchers discovered several influence factors of kinetics, such as chemical composition, water-cement ratio, fineness, curing temperature, etc [7].
The effective diffusion coefficient of water is affected by the tortuosity of the gel pores as well as the radii of the gel pores in the hydrate.
In the past, several interesting concepts have been proposed to simulating the hydration and microstructure development of concrete and the research of macroscopic physics mechanical property.
In addition, cement hydration process are impacted by several factors, such as water-cement ratio, chemical composition of cement, fineness, curing temperature and humidity, so it is necessary to build the hydration microcosmic model.
In the past research, many researchers discovered several influence factors of kinetics, such as chemical composition, water-cement ratio, fineness, curing temperature, etc [7].
The effective diffusion coefficient of water is affected by the tortuosity of the gel pores as well as the radii of the gel pores in the hydrate.
Online since: December 2014
Authors: Li Jiu Wang, Yun Tao Zhang
A Finite Element Analysis on SAW Sensor for Torque Measuring
Lijiu Wang 1, a *, Yuntao Zhang 2,b
1 Key laboratory of Fundamental Science for Advanced Machining, School of Mechanical Engineering, Beijing Institute of Technology, Beijing, 100081,China
2 Key laboratory of Fundamental Science for Advanced Machining, School of Mechanical Engineering, Beijing Institute of Technology, Beijing, 100081,China
awanglijiu@bit.edu.cn, 24728,byuntao@163.comdu.cn
Keywords: Surface Acoustic Wave , FEA, SAW Sensor
Abstract.
Torque measurement based on the SAW technology has advantages of high measuring accuracy, fast response and passive wireless property, overcoming disadvantages of strain gauge measurement, grating measurement, etc.
There are many factors that affect the strain transfer.
By studying the relationship between these factors and strain transfer, we will provide a theoretical basis for optimizing the design of sensor structure.
The sensitivity study focuses on the thickness and the elastic properties of the adhesive layer.
Torque measurement based on the SAW technology has advantages of high measuring accuracy, fast response and passive wireless property, overcoming disadvantages of strain gauge measurement, grating measurement, etc.
There are many factors that affect the strain transfer.
By studying the relationship between these factors and strain transfer, we will provide a theoretical basis for optimizing the design of sensor structure.
The sensitivity study focuses on the thickness and the elastic properties of the adhesive layer.
Online since: October 2016
Authors: Kang Chiang Liew, Singan Grace
The factors which usually affect the hydrolysis process are such as the concentration of either the substrate or enzymes, temperature and pH.
(Source: Starches - Characterization, Properties, and Applications [7]) Fig. 1.
However, retrogradation is sometimes promoted to modify structural, mechanical or organoleptic properties of certain starch-based products.
Properties of Hydrolyzed Starch Determination of Hydrolysis Yield.
Bertolini, Starches: Characterization, properties, and applications.
(Source: Starches - Characterization, Properties, and Applications [7]) Fig. 1.
However, retrogradation is sometimes promoted to modify structural, mechanical or organoleptic properties of certain starch-based products.
Properties of Hydrolyzed Starch Determination of Hydrolysis Yield.
Bertolini, Starches: Characterization, properties, and applications.
Online since: May 2014
Authors: Hong Yan Zhou
Technical parameters of FieldSpec Pro
Spectral range
350-2500nm
Sampling interval
1nm
Spectral resolution
3nm for 350-1000nm, 10nm for 1000-2500nm
Output number of bands
2150
FOV
10
Hyperion data preprocessing.Surface radiation arriving sensor is a complex process influenced by many factors, including the biophysical properties of the ground, the surface roughness geometry, observation and light exposure, atmospheric conditions and other factors, so the data cannot be directly reflected Hyperion feature reflectance information, and the process of acquiring the image due to some mechanical reasons may also cause some degree of distortion of the data [2].
Image noise is affected by the water vapor band,cannotshow the information of surface.
Delete severely affected by the water vapor bands 35.
Image noise is affected by the water vapor band,cannotshow the information of surface.
Delete severely affected by the water vapor bands 35.
Online since: February 2015
Authors: Zhao Hui Huang, Zhen Ya Chen
Introduction
Density logging, or gamma-gamma logging, scattered gamma ray logging is logging method using Compton scattering, which is mainly used to identify lithology, porosity calculation, computing flexibility and mechanical parameters of the rock formations.
In ideal condition, gamma ray effects only in strata and then output pure stratigraphic interpretation, so density logging is the direct reaction of formation properties.
However, usually, the underground condition is always complicated; data of density logging is highly affected by environment like the gap between instruments and the wall, the nature and gravity of mud, mud cake, debris, mud invasion, etc.
Model these factors in lab rather than fulfill the wish of revealing the underground situation, a huge burden of set the lab up cannot be afford.
Setting a suitable cut-off, combined with environmental factors density logging features, build optimization models.
In ideal condition, gamma ray effects only in strata and then output pure stratigraphic interpretation, so density logging is the direct reaction of formation properties.
However, usually, the underground condition is always complicated; data of density logging is highly affected by environment like the gap between instruments and the wall, the nature and gravity of mud, mud cake, debris, mud invasion, etc.
Model these factors in lab rather than fulfill the wish of revealing the underground situation, a huge burden of set the lab up cannot be afford.
Setting a suitable cut-off, combined with environmental factors density logging features, build optimization models.
Online since: February 2012
Authors: Hua Qing Lai
Pham and Colton [2] developed an ejection force model by combining the effects of thermal shrinkage and mechanical interlocking due to stair-steps on the surface of SL tools.
Palmer and Colton [3] studied the design rules for stereolithography tooling, the study indicates that draft angle is one of the critical factors that contribute to mold life and by increasing the draft angle, more parts can be made before the tool failure.
Mold feature geometry is another issue that directly affects the number of quality parts that a mold can produce.
The inputs required to simulate the process were the molding conditions and mold material properties.
Conclusion The stereolithography tooling life not only depends upon factors such as material and processing conditions, it also depends on the geometrical features of the mold.
Palmer and Colton [3] studied the design rules for stereolithography tooling, the study indicates that draft angle is one of the critical factors that contribute to mold life and by increasing the draft angle, more parts can be made before the tool failure.
Mold feature geometry is another issue that directly affects the number of quality parts that a mold can produce.
The inputs required to simulate the process were the molding conditions and mold material properties.
Conclusion The stereolithography tooling life not only depends upon factors such as material and processing conditions, it also depends on the geometrical features of the mold.
Online since: August 2013
Authors: Tao Chen, Song Li, Yang Du
The river is a strong tidal river, affected by the Yellow Sea half-day tidal and seawater flows backward all year.
But the construction of the vacuum in the stability and control of transfer efficiency requirements are strict and affect directly the desired effect.
Considering the river water level, water level of face side, opening gate in flood season, 8 degrees seismic and other factors, and vertical load of wing wall foundation pile is little difference, so the design uses the maximum load (Pmax=561.73KN) as design basis of pile length.
Considering the river water level, water level of face side, opening gate in flood season, 8 degrees seismic and other factors, the maximum horizontal load of single pile under the wing wall is 146.60KN.
Physical and mechanical properties of marine soft soil are complex.
But the construction of the vacuum in the stability and control of transfer efficiency requirements are strict and affect directly the desired effect.
Considering the river water level, water level of face side, opening gate in flood season, 8 degrees seismic and other factors, and vertical load of wing wall foundation pile is little difference, so the design uses the maximum load (Pmax=561.73KN) as design basis of pile length.
Considering the river water level, water level of face side, opening gate in flood season, 8 degrees seismic and other factors, the maximum horizontal load of single pile under the wing wall is 146.60KN.
Physical and mechanical properties of marine soft soil are complex.