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Online since: September 2011
Authors: Ming Shan Yang
More importantly, experimental results indicated that three regenerated cellulose samples had different microstructure and superstructure, which greatly affects the properties of regenerated cellulose.
The investigation of effects of humidity on the dynamic properties of three cellulose at middle temperature.
The investigation of effects of humidity on the dynamic properties of three cellulose at higher temperature.
More importantly, experimental results indicated that three regenerated cellulose samples had different microstructure and superstructure, which greatly affects the properties of regenerated cellulose.
Influence of water on structure and mechanical properties of regenerated cellulose studied by an organized combination of infrared spectra, X-ray diffraction, and dynamic viscoelastic data measured as functions of temperature and humidity.
The investigation of effects of humidity on the dynamic properties of three cellulose at middle temperature.
The investigation of effects of humidity on the dynamic properties of three cellulose at higher temperature.
More importantly, experimental results indicated that three regenerated cellulose samples had different microstructure and superstructure, which greatly affects the properties of regenerated cellulose.
Influence of water on structure and mechanical properties of regenerated cellulose studied by an organized combination of infrared spectra, X-ray diffraction, and dynamic viscoelastic data measured as functions of temperature and humidity.
Online since: April 2011
Authors: Fritz Klocke, Dieter Lung, Peter Frank, Ralf Schlosser, Hendrik Puls, Anja Herrmann Pratourlon
After the development, the methodology has been applied and verified by a reference part which includes the basic features and properties of the clutch housing.
It turned out that the most important factors which influence the flatness of these milled interfaces are the forces and thermal expansion during the milling process as well as the position of the clamping points.
In a second step these process factors are used to calculate the part deformation during machining.
This analysis indicates if the process engineer should consider the dynamic properties of the system consisting of the workpiece and the clamping system.
For this reason the Eigenfrequency analysis will be conducted to evaluate the dynamic properties of the clamping system and the workpiece.
It turned out that the most important factors which influence the flatness of these milled interfaces are the forces and thermal expansion during the milling process as well as the position of the clamping points.
In a second step these process factors are used to calculate the part deformation during machining.
This analysis indicates if the process engineer should consider the dynamic properties of the system consisting of the workpiece and the clamping system.
For this reason the Eigenfrequency analysis will be conducted to evaluate the dynamic properties of the clamping system and the workpiece.
Online since: January 2005
Authors: Woo Jin Kim, Hyo Tae Jeong
Mechanical Properties and Texture Evolution of AZ31 Mg Alloy during
Equal Channel Angular Pressing
H.
Microstructure and texture evolution in the AZ31 Mg alloy subject to equal channel angular pressing (ECAP) have been investigated and correlated with the mechanical properties.
The Schmid factors on basal slip systems for 1 passed material are relatively small compared to those for more than 2 passed materials and all basal slip systems in 6 and 8 passed materials can be activated with high values of Schmid factors.
It is also possible to correlated the small changes of yields stress with variations of schmid factors after 2 and 6 passes.
Table 1 Textures and Schmid factors of the ECAPed AZ31 Mg alloys.
Microstructure and texture evolution in the AZ31 Mg alloy subject to equal channel angular pressing (ECAP) have been investigated and correlated with the mechanical properties.
The Schmid factors on basal slip systems for 1 passed material are relatively small compared to those for more than 2 passed materials and all basal slip systems in 6 and 8 passed materials can be activated with high values of Schmid factors.
It is also possible to correlated the small changes of yields stress with variations of schmid factors after 2 and 6 passes.
Table 1 Textures and Schmid factors of the ECAPed AZ31 Mg alloys.
Online since: February 2011
Authors: Maolin Ni, Jie Jin, Shen Hao Wang
The properties of porous silicon carbide composite are studied, such as surface HV and corrosion resistance, and the influence of the pore agent content to mechanical properties.
Besides, the chemistry stability and mechanical properties of the composite are the important performances.
Hardness is a main parameter of mechanical properties of material.
With the pore agent content increasing, the porosity of composite also increases, but mechanical properties of material inevitably reduce.
The mechanical properties of composite pore agent content [%] 10 12.5 15 bending strength [MPa] 98.4 99.3 95.1 compressive strength [MPa] 93.4 94.5 89.6 We determined that the range of pore agent content is 10~15%, and tested the mechanical properties of composite when the pore agent content respectively is 10%, 2.5% and 15%, they are shown in table 1.
Besides, the chemistry stability and mechanical properties of the composite are the important performances.
Hardness is a main parameter of mechanical properties of material.
With the pore agent content increasing, the porosity of composite also increases, but mechanical properties of material inevitably reduce.
The mechanical properties of composite pore agent content [%] 10 12.5 15 bending strength [MPa] 98.4 99.3 95.1 compressive strength [MPa] 93.4 94.5 89.6 We determined that the range of pore agent content is 10~15%, and tested the mechanical properties of composite when the pore agent content respectively is 10%, 2.5% and 15%, they are shown in table 1.
Online since: October 2013
Authors: Shan He Mu, Chuan Liang Cao, Xiang Lin Zhang, Zha Xiang, Xiu Mao
Introduction
The fine-blanking die is easy to generate fatigue failure under the action of high contact pressure, furious friction and alternating loads in the process of stamping[1].Many high-tech fine-blanking enterprises select thepowder-metallurgy high-speed steel(PMHSS)to manufacture high level dies because of its good mechanical properties[2].
The two kinds of steels are usually used for fine-blanking punch-die.Few studies on the materials properties of the two kinds of steels are reported.
The properties of surface layer created in grinding influence the functional properties of the tooldirectly, such as fatigue strength and corrosion resistance, etc[3-5].
It is shown from range analysis that n is the most important factor, followed by Vx,Vy and ap.
Fig.3 Cross–sectional Surface structure of the NO.8 sample with (a) before lapping and (b) after lapping Usually, the WL is considered harmful to mechanical properties of workpiece.
The two kinds of steels are usually used for fine-blanking punch-die.Few studies on the materials properties of the two kinds of steels are reported.
The properties of surface layer created in grinding influence the functional properties of the tooldirectly, such as fatigue strength and corrosion resistance, etc[3-5].
It is shown from range analysis that n is the most important factor, followed by Vx,Vy and ap.
Fig.3 Cross–sectional Surface structure of the NO.8 sample with (a) before lapping and (b) after lapping Usually, the WL is considered harmful to mechanical properties of workpiece.
Online since: June 2014
Authors: Xin Zheng, Xiao Lian Zhang, Wei Hua Zhu, Hong Xia Liu
In this experiment, the instrumental detective conditions were determined, and analyzed several main factors affecting the experimental results, concluded the effects of temperature, hydrofluoric acid and deionized water on dissolving zirconium powder, summarized the method to detect zirconium powder content directly by ICP.
Introduction Zirconium and zirconium alloys possess outstanding nuclear performance, beside it have excellent corrosion resistance and mechanical performance, have been applied extensively in civilian area of energy, petroleum, chemical industry, pharmacy, medical equipments and light industry and so on, also as an important additional element of high property magnesium alloys [1], the additive of medium temperature nuclear materials [2], armament industry and aerospace new materials [3].
Detective results and influence factors as shown in the Tab. 1.
The influence of solution temperature on the test results ICP-AES plasma test method belongs to trace test, so pay attention to eliminate all influential factors for the experiment is needed.
References [1] Chen Bin, Lu Chen, Lin Dong-liang, Effect of zirconium addition on microstructure and mechanical properties of Mg97Y2Zn1 alloy [J].
Introduction Zirconium and zirconium alloys possess outstanding nuclear performance, beside it have excellent corrosion resistance and mechanical performance, have been applied extensively in civilian area of energy, petroleum, chemical industry, pharmacy, medical equipments and light industry and so on, also as an important additional element of high property magnesium alloys [1], the additive of medium temperature nuclear materials [2], armament industry and aerospace new materials [3].
Detective results and influence factors as shown in the Tab. 1.
The influence of solution temperature on the test results ICP-AES plasma test method belongs to trace test, so pay attention to eliminate all influential factors for the experiment is needed.
References [1] Chen Bin, Lu Chen, Lin Dong-liang, Effect of zirconium addition on microstructure and mechanical properties of Mg97Y2Zn1 alloy [J].
Online since: June 2018
Authors: Sergey Zelenov, Lev Rabinskiy, Ekaterina Kuznetsova, Andrey Ripetskiy
It was determined that the convergence is affected by numerous factors: temperature in the machine chamber, material properties, heat exchange and the processes running into the chamber of the certain machines.
The convergence is affected by numerous factors: temperature in the machine chamber, material properties, heat exchange and the processes running into the chambers of the certain machines.
The question of the validity of the model for the calculation of the thermal state, exertion and deformation stays one of the most challenging, which is confirmed by the differences in the geometry and in the properties of the items, printed with the different machines but from the same Electronic Model.
Ploshikhin, Thermo-mechanical simulation of additive layer manufacturing of titanium aerospace structures, Proceedings of the LightMAT Conference, September 3, 2013 – September 5, 2013, Bremen, Germany, 2013
Reutzel, Thermo-mechanical model development and validation of directed energy deposition additive manufacturing of Ti-6Al-4V, Additive Manufacturing, 5 (2015) 9–19
The convergence is affected by numerous factors: temperature in the machine chamber, material properties, heat exchange and the processes running into the chambers of the certain machines.
The question of the validity of the model for the calculation of the thermal state, exertion and deformation stays one of the most challenging, which is confirmed by the differences in the geometry and in the properties of the items, printed with the different machines but from the same Electronic Model.
Ploshikhin, Thermo-mechanical simulation of additive layer manufacturing of titanium aerospace structures, Proceedings of the LightMAT Conference, September 3, 2013 – September 5, 2013, Bremen, Germany, 2013
Reutzel, Thermo-mechanical model development and validation of directed energy deposition additive manufacturing of Ti-6Al-4V, Additive Manufacturing, 5 (2015) 9–19
Online since: October 2014
Authors: Jin Long Xu, Yu Zhuo Jia
Study on Shallow Embedded Column Foot of Reactive Powder Concrete Pole Mechanical Properties
Yuzhuo Jia1,a, Jinlong Xu2,b*
1School of Architecture, Northeast Dianli University, Jilin 132012, China
2School of Architecture, Northeast Dianli University, Jilin 132012, China
b*1126005268@qq.com
Keywords: shallow embedded column foot ; transmission line ;poles ;reactive powder concrete
Abstract.
The results show that shallow embedded column foot has good mechanical properties.
As an important connection between the main body and base, the column foot is the dominant factor to determine the pole’s stability bearing capacity, and play an important role in the whole structure.
For the shallow embedded column foot can be better applied in practical engineering, So it is necessary to study the mechanical properties of shallow embedded column foot base etc, In order to provide some useful help and advice for the design and calculation of the structure of column base. 1. 500kV Pole Project Profile Wire is four splits LGJ-400/35 ACSR ,using GJ-150 two lightning conductor, horizontal span is 420 meters, vertical span is 550 meters ,The maximum wind speed is 30m/s , maximum temperature is +40℃, minimum temperature is -10℃ ,design ice thickness is 10mm.
In order to force transmission performance for further investigation of anchor bolts and the possible influencing factors, Here are the basis of stress change in the adjacent section, also the stress anchor undertake between adjacent section.
The results show that shallow embedded column foot has good mechanical properties.
As an important connection between the main body and base, the column foot is the dominant factor to determine the pole’s stability bearing capacity, and play an important role in the whole structure.
For the shallow embedded column foot can be better applied in practical engineering, So it is necessary to study the mechanical properties of shallow embedded column foot base etc, In order to provide some useful help and advice for the design and calculation of the structure of column base. 1. 500kV Pole Project Profile Wire is four splits LGJ-400/35 ACSR ,using GJ-150 two lightning conductor, horizontal span is 420 meters, vertical span is 550 meters ,The maximum wind speed is 30m/s , maximum temperature is +40℃, minimum temperature is -10℃ ,design ice thickness is 10mm.
In order to force transmission performance for further investigation of anchor bolts and the possible influencing factors, Here are the basis of stress change in the adjacent section, also the stress anchor undertake between adjacent section.
Online since: October 2014
Authors: Piotr Lacki, Janina Adamus, Monika Gierzyńska-Dolna, Wilhelm Gorecki
Although steel sheets are relatively cheap and have good mechanical and technological properties, low resistance against corrosion poses a fundamental weakness.
Coating thickness and kind of the applied galvanising technology is pointed as the key factors affecting the corrosion resistance of galvanised sheets.
It results from the fact that steel has good mechanical and technological properties, is cheap and suitable for recycling.
Thanks to strong anti-corrosion properties Galfan and Galvalume are suitable for roofing and siding.
Thickness of zinc coat, terms and conditions of sheet storage, and method of sheet-metal forming are the main factors affecting corrosion resistance of galvanised sheets.
Coating thickness and kind of the applied galvanising technology is pointed as the key factors affecting the corrosion resistance of galvanised sheets.
It results from the fact that steel has good mechanical and technological properties, is cheap and suitable for recycling.
Thanks to strong anti-corrosion properties Galfan and Galvalume are suitable for roofing and siding.
Thickness of zinc coat, terms and conditions of sheet storage, and method of sheet-metal forming are the main factors affecting corrosion resistance of galvanised sheets.
Online since: August 2013
Authors: Xin Yu Liu, Ai Hua Liu, Bang Biao Wu
X-shaped conjugated single-slope shear failure and single-slope shear failure under compression and shear tests ; (2) under uniaxial compression, the performance of intact specimen is clearly affected by its size, and the strength of jointed one is significantly affected by the weakening of the structure.
And the spatial distribution and properties of the structural surface (like geometry, density, filling materials, etc.) [1] play a controlling role in the deformation and failure of rock mass.
Test specimens preparation Similar material model test is widely used in the mechanical research of jointed rock [6~9] for the following reasons: (1) to make parametric analysis, that is, the engineering practice controlled by multiple factors can be tested under individual event, in order to analyze the influence of a certain factor; (2) to solve the problem of engineering mechanics which can not be solved by mathematical method at the present time;(3) to study mechanical phenomenon that may occur and to calculate deformation of the prototype from the model test.
The value of c will be affected also by the joints existence, e.g. c is 1.03, 0.51and 0.50 respectively for the 3 different kinds of specimens.
(4) The mechanical properties of material with preset filling joints are affected by the physical and chemical properties of filling material.
And the spatial distribution and properties of the structural surface (like geometry, density, filling materials, etc.) [1] play a controlling role in the deformation and failure of rock mass.
Test specimens preparation Similar material model test is widely used in the mechanical research of jointed rock [6~9] for the following reasons: (1) to make parametric analysis, that is, the engineering practice controlled by multiple factors can be tested under individual event, in order to analyze the influence of a certain factor; (2) to solve the problem of engineering mechanics which can not be solved by mathematical method at the present time;(3) to study mechanical phenomenon that may occur and to calculate deformation of the prototype from the model test.
The value of c will be affected also by the joints existence, e.g. c is 1.03, 0.51and 0.50 respectively for the 3 different kinds of specimens.
(4) The mechanical properties of material with preset filling joints are affected by the physical and chemical properties of filling material.