Sort by:
Publication Type:
Open access:
Publication Date:
Periodicals:
Search results
Online since: July 2012
Authors: Ze Quan Hua, Bin Zhang, Ji Hua Chen, Lian Jun Sun, Ying Zhang
After sintering, all the physical, chemical and mechanical properties of green body will change, such as bending strength, density, crystal shape, composition and et al.
Further research was also needed, such as grain size and microstructure observation with scanning electron microscope and the other mechanical properties test.
[6] Takaki M, Mechanical properties of toughened ZrO2-Y2O3 ceramics, Journal of America Ceramic Society, 69 (1986) 638-640
Sintering , microstructure and mechanical properties of commercial Y-TZPs.
[8] Tsukuma K, Kubota Y, Tsukidate T, Thermal and mechanical properties of Y2O3-stabilized tetragonal zirconia polycrystals.
Further research was also needed, such as grain size and microstructure observation with scanning electron microscope and the other mechanical properties test.
[6] Takaki M, Mechanical properties of toughened ZrO2-Y2O3 ceramics, Journal of America Ceramic Society, 69 (1986) 638-640
Sintering , microstructure and mechanical properties of commercial Y-TZPs.
[8] Tsukuma K, Kubota Y, Tsukidate T, Thermal and mechanical properties of Y2O3-stabilized tetragonal zirconia polycrystals.
Online since: May 2012
Authors: Chao Jun Wan, Xu Chen, Teng Li, Tai Zhong Huang, Tian Ming Deng
Mechanical properties
The investigated mechanical properties of the concrete included cubic compressive strength, prism compressive strength, splitting tensile strength, bending strength and the static compressive elastic modulus at the age of 28 days.
Mechanical properties The cubic compressive strength as a function of age of OAC, LRAC and HRAC is shown in Fig.3.
In order to make clearer the effect of different variability of aggregate on mechanical properties of concrete, the comparison of mechanical properties of the three concretes is presented in Fig.4 as a reference of OAC, that is, the relative value of given mechanical index of OAC is regarded as the baseline 1.00.
Therefore, using recycled aggregate is unfavorable to the mechanical properties and durability of concrete.
Depending on all above experiments and analysis, it can be concluded that the properties of recycled aggregate is an essential factor to influence the properties of recycled concrete and always unfavorable to the properties of recycled concrete as unexpected.
Mechanical properties The cubic compressive strength as a function of age of OAC, LRAC and HRAC is shown in Fig.3.
In order to make clearer the effect of different variability of aggregate on mechanical properties of concrete, the comparison of mechanical properties of the three concretes is presented in Fig.4 as a reference of OAC, that is, the relative value of given mechanical index of OAC is regarded as the baseline 1.00.
Therefore, using recycled aggregate is unfavorable to the mechanical properties and durability of concrete.
Depending on all above experiments and analysis, it can be concluded that the properties of recycled aggregate is an essential factor to influence the properties of recycled concrete and always unfavorable to the properties of recycled concrete as unexpected.
Online since: July 2016
Authors: Elisa Maria Ruiz-Navas, Elena Gordo, Leandro Bolzoni
Among them, Ti presents a very interesting combination of physical and mechanical properties [2].
Jaffee, Heat treatment and mechanical properties of Ti-Fe alloys, Trans.
Kim, Mechanical and oxidation properties of Ti-xFe-ySi alloys, Mater.
Qian, Sintering of Ti–10V–2Fe–3Al and mechanical properties, Mater.
Hanawa, Mechanical properties and microstructures of new Ti-Fe-Ta and Ti-Fe-Ta-Zr system alloys, Mater.
Jaffee, Heat treatment and mechanical properties of Ti-Fe alloys, Trans.
Kim, Mechanical and oxidation properties of Ti-xFe-ySi alloys, Mater.
Qian, Sintering of Ti–10V–2Fe–3Al and mechanical properties, Mater.
Hanawa, Mechanical properties and microstructures of new Ti-Fe-Ta and Ti-Fe-Ta-Zr system alloys, Mater.
Online since: November 2012
Authors: Gan Lin Cheng, Zhao Long Liu, Dong Su Zhang
Revolving Jet Nozzle Design on Eliminate Surface Soil of Shallow Submersion
Dong Su Zhang a, Gan Lin Cheng b and Zhao Long Liu c
School of Mechanical Engineering, Anhui University of Science and Technology
Huainan, China
adszhang@aust.edu.cn, bganlincheng87@163.com,cliuzhaolong198812@163.com
Keywords: Revolving jet, Shallow submersion, Mine, Nozzle
Abstract.
Based on the revolving water jet flow theory and soil mechanics theory, by means of the action of the jet flow to the soil body surface and the mechanism of the revolving jet flow breaking ground analysis, and the thoughts of which the action pressure of jetting is basic external factor of the soil body destruction, but the soil body critical destructive power to soil body is determined by its internal factors that physical and mechanical properties of the soil, only then, when the jet flow action is greater than the soil body the critical destructive power, the soil body only then possibly has the destruction.
In addition to the rotating jet in the axial, radial velocity component, the rotation speed (tangential velocity) radial and axial pressure gradient will affect the entire flow field.
The shape of the pattern spray nozzle is relatively simple, the inside flow passage of the nozzle is different from the contraction section, is the arc shape, three-dimensional shape as shown in Fig. 5 as shown: The design of plus revolving components Primary role of plus revolving components is forced the jet through the straight pipe to form a spiral flow after accessing the spiral flow channel, the flow channel shape of plus revolving components will affect the spin degrees of rotating jet and the volume absorption capacity, etc. and the screw channel shape is determined by its head number ( spiral channel number)and the pitch .
Based on the revolving water jet flow theory and soil mechanics theory, by means of the action of the jet flow to the soil body surface and the mechanism of the revolving jet flow breaking ground analysis, and the thoughts of which the action pressure of jetting is basic external factor of the soil body destruction, but the soil body critical destructive power to soil body is determined by its internal factors that physical and mechanical properties of the soil, only then, when the jet flow action is greater than the soil body the critical destructive power, the soil body only then possibly has the destruction.
In addition to the rotating jet in the axial, radial velocity component, the rotation speed (tangential velocity) radial and axial pressure gradient will affect the entire flow field.
The shape of the pattern spray nozzle is relatively simple, the inside flow passage of the nozzle is different from the contraction section, is the arc shape, three-dimensional shape as shown in Fig. 5 as shown: The design of plus revolving components Primary role of plus revolving components is forced the jet through the straight pipe to form a spiral flow after accessing the spiral flow channel, the flow channel shape of plus revolving components will affect the spin degrees of rotating jet and the volume absorption capacity, etc. and the screw channel shape is determined by its head number ( spiral channel number)and the pitch .
Online since: September 2019
Authors: Andrey Arkadyevich Rzhavtsev, Viktor A. Markov, Victoria Alexandrovna Sokolova
Experimental
In the formation of coatings are of great importance rheological properties of liquid paints.
At the stage of preliminary experiments to determine the nature of the dependence of the output parameter on individual control factors, a classical experiment was used.
The natural values of the control factors and the ranges of their variation are presented in table 1.
During the filling of paint pigments the main qualitative properties of the obtained coating composition is hiding power of paint [6].
The improvement of the coating properties is due to the fact that when the pigment filling volume of the film-forming agent increases, the number of leafing layers of particles in the coating increases, which have the property of reinforcing the coating, improving its strength and operational properties.
At the stage of preliminary experiments to determine the nature of the dependence of the output parameter on individual control factors, a classical experiment was used.
The natural values of the control factors and the ranges of their variation are presented in table 1.
During the filling of paint pigments the main qualitative properties of the obtained coating composition is hiding power of paint [6].
The improvement of the coating properties is due to the fact that when the pigment filling volume of the film-forming agent increases, the number of leafing layers of particles in the coating increases, which have the property of reinforcing the coating, improving its strength and operational properties.
Online since: October 2010
Authors: Gusri Akhyar Ibrahim, Che Hassan Che Haron, Jaharah Abd Ghani, Mohd Shahir Kasim, Mohd Amri Sulaiman, T.K. Soon
Feed rate was found to be the most significant parameter affecting the surface roughness.
This material offers high yield, tensile, and creep-rupture properties at high temperatures and corrosion resistance [2], thus, Inconel 718 has gained wide acceptance in aerospace industries that require corrosive environment, pitting and crevice corrosion resistance [3].
The drawback of Inconel 718 excellent properties was the the most difficult to machine material.
Good mechanical properties together with work hardening lead to increase the cutting force and cause many problems that are contributing to early tool failure.
Based on a 95% confidence interval, feed rate, f, is statistically significant affecting the surface roughness, since their p-values are less than 5%.
This material offers high yield, tensile, and creep-rupture properties at high temperatures and corrosion resistance [2], thus, Inconel 718 has gained wide acceptance in aerospace industries that require corrosive environment, pitting and crevice corrosion resistance [3].
The drawback of Inconel 718 excellent properties was the the most difficult to machine material.
Good mechanical properties together with work hardening lead to increase the cutting force and cause many problems that are contributing to early tool failure.
Based on a 95% confidence interval, feed rate, f, is statistically significant affecting the surface roughness, since their p-values are less than 5%.
Online since: February 2014
Authors: Rong Lu Sun, L.P. Song
The notch toughness properties were assessed in the PWHT condition and after a temper embrittlement step-cooling treatment. the J and X factors of the weld should be more rigorous than the base steel.
The stability of the carbide precipitates depends on the chemical composition of steel and tempering conditions, Factors affecting temper embrittlement of low alloy Cr–Mo steels are suggested to be as follows1-2: ①Chemical composition, ②Temperature, ③Holding time, ④Applied stress.
Among these factors, the effect of chemical composition is the most important.
As shown, ΔvTr54 ranged from 9 to 35℃, In all the four figures, welds B, C and D met the notch toughness requirement of 54 J at -40℃, weld C and D met the notch toughness requirement of 54 J at -29℃ after step cooling , only weld D met VTr54+3ΔVTr54≤0℃, So only weld D maintaining weld quality and providing acceptable mechanical properties.J-factor and X-factor have the same tendency with VTr54+3ΔVTr54 for all the test results.
Low Mn and Si content can satisfy the J , x and VTr54+3ΔVTr54 factors
The stability of the carbide precipitates depends on the chemical composition of steel and tempering conditions, Factors affecting temper embrittlement of low alloy Cr–Mo steels are suggested to be as follows1-2: ①Chemical composition, ②Temperature, ③Holding time, ④Applied stress.
Among these factors, the effect of chemical composition is the most important.
As shown, ΔvTr54 ranged from 9 to 35℃, In all the four figures, welds B, C and D met the notch toughness requirement of 54 J at -40℃, weld C and D met the notch toughness requirement of 54 J at -29℃ after step cooling , only weld D met VTr54+3ΔVTr54≤0℃, So only weld D maintaining weld quality and providing acceptable mechanical properties.J-factor and X-factor have the same tendency with VTr54+3ΔVTr54 for all the test results.
Low Mn and Si content can satisfy the J , x and VTr54+3ΔVTr54 factors
Online since: April 2013
Authors: Zhi Bo Cui, You Shan Wang, Sha Sha Jiang, Qiang Liu
The influence of tire performance that due to tread rubber properties’ changes is discussed below.
Actually, the tread rubber has a great impact on the overall performance of the tire, a lot of factors are coupled, for example, affect the rolling resistance also affects the wear resistance, and so it is unreasonable to analysis unique property [12-14].
Conclusions Based on the material of the tire tread rubber oil resistance test, that the rubber material has occurred swelling phenomenon, the internal microscopic structure and Mechanical properties are changed, all the basic physical properties of the rubber material has declined, resulting in deterioration of the durability of the tire, wear resistance, maneuverability, rolling resistance and other performance.
Experimental investigations on the dynamic mechanical properties of aged rubbers [J].
Special fluorine rubber oil medium aging properties.
Actually, the tread rubber has a great impact on the overall performance of the tire, a lot of factors are coupled, for example, affect the rolling resistance also affects the wear resistance, and so it is unreasonable to analysis unique property [12-14].
Conclusions Based on the material of the tire tread rubber oil resistance test, that the rubber material has occurred swelling phenomenon, the internal microscopic structure and Mechanical properties are changed, all the basic physical properties of the rubber material has declined, resulting in deterioration of the durability of the tire, wear resistance, maneuverability, rolling resistance and other performance.
Experimental investigations on the dynamic mechanical properties of aged rubbers [J].
Special fluorine rubber oil medium aging properties.
Online since: June 2014
Authors: Ke Tong, Xiao Dong He, Ming Hua Liang, Wei Ping Lin, Li Xia Zhu
Furthermore, the mechanical properties of X80 pipeline welded by single wire welding and double wire welding respectively have been compared.
The work presented in this paper was focused on the mechanical properties and microstructure of girth welds of grade X80 pipeline.
Mechanical Properties of welded joints of double and single wire welding for X80 pipeline Weld consumable Welding process Tensile properties /MPa CVN absorbed energy /J CTOD(-10℃)/mm Rt0.5 Rm -40℃ -10℃ Min.
Research on influencing factor of impact toughness in coarse grain heat-affected zone for X80 pipeline steel.
Tensile and Toughness Properties of Pipeline Girth Welds.
The work presented in this paper was focused on the mechanical properties and microstructure of girth welds of grade X80 pipeline.
Mechanical Properties of welded joints of double and single wire welding for X80 pipeline Weld consumable Welding process Tensile properties /MPa CVN absorbed energy /J CTOD(-10℃)/mm Rt0.5 Rm -40℃ -10℃ Min.
Research on influencing factor of impact toughness in coarse grain heat-affected zone for X80 pipeline steel.
Tensile and Toughness Properties of Pipeline Girth Welds.
Online since: June 2012
Authors: Yan Chen, Xiao Yan Lin, Yong Man Jiang, Ming Qi Chen, Hong Ping Zhang
The effects of preparing conditions on the mechanical properties of KGM/CaCO3 composite films.
The effects of swelling time, CaCO3 and KGM on the properties of the composite membrane were studied through the orthogonal experiments using L9(34).
It is indicated that the effects of the factors on the tensile strength of the composite membrane were different.
Factor Tensile strength / MPa A B C 1 1 1 1 43.35 2 1 2 2 36.06 3 1 3 3 25.48 4 2 1 2 32.60 5 2 2 3 30.04 6 2 3 1 26.92 7 3 1 3 28.11 8 3 2 1 32.03 9 3 3 2 33.26 Fig.4 Relations of factors and levels on TS of KGM/CaCO3 composite films Fig.5 Range comparison of factors affecting on TS of KGM/CaCO3 composite films Table 3 ANOVA of experimental factors affecting the tensile strength of KCaCF source SS Df MS F F0.05 Swelling time 42.42 2 21.21 0.74 19.00 CaCO3 58.80 2 29.40 1.02 KGM 75.92 2 37.96 1.32 Error 57.41 2 28.71 Table 3 indicated that there was one factor greatly affecting the tensile strength of KGM/CaCO3 composite film (which is detected by p>0.05).
Zhao: China Pulp Pap., Vol. 23 (2004), p. 14 [7] GB13022-1991 Plastics-Determination of tensile properties of films.
The effects of swelling time, CaCO3 and KGM on the properties of the composite membrane were studied through the orthogonal experiments using L9(34).
It is indicated that the effects of the factors on the tensile strength of the composite membrane were different.
Factor Tensile strength / MPa A B C 1 1 1 1 43.35 2 1 2 2 36.06 3 1 3 3 25.48 4 2 1 2 32.60 5 2 2 3 30.04 6 2 3 1 26.92 7 3 1 3 28.11 8 3 2 1 32.03 9 3 3 2 33.26 Fig.4 Relations of factors and levels on TS of KGM/CaCO3 composite films Fig.5 Range comparison of factors affecting on TS of KGM/CaCO3 composite films Table 3 ANOVA of experimental factors affecting the tensile strength of KCaCF source SS Df MS F F0.05 Swelling time 42.42 2 21.21 0.74 19.00 CaCO3 58.80 2 29.40 1.02 KGM 75.92 2 37.96 1.32 Error 57.41 2 28.71 Table 3 indicated that there was one factor greatly affecting the tensile strength of KGM/CaCO3 composite film (which is detected by p>0.05).
Zhao: China Pulp Pap., Vol. 23 (2004), p. 14 [7] GB13022-1991 Plastics-Determination of tensile properties of films.