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Online since: January 2009
Authors: Guang Sheng Huang, Guang Jie Huang, Wei Xu, Hong Cheng Li, Fu Sheng Pan
Mechanical property of the
samples before and after RUB were characterized and compared.
Samples were obtained from bended magnesium alloy sheet like Fig.2 and mechanical properties were tested.
Table 2 shows the mechanical properties and Erichsen values.
Table 3 Factors and levels of 4 3 16(4 2 )L × orthogonal table Factors Levels 1 2 3 4 A RUB pass 2 4 6 10 B Annealing temperature (°C) 135 200 260 300 C Radius of support (mm) 0.5 1 1.5 2 D Holding time (min) 0 15 30 60 E RUB angle (º) 90 120 F Tensile force (N) 60 100 G Lubricated surface Yes no Range analysis indicates that factor B and F have great effect on Erichsen value of the magnesium alloy sheet after RUB in this experiment.
Table 5 shows the mechanical properties along 0º, 45º and 90º orientations.
Samples were obtained from bended magnesium alloy sheet like Fig.2 and mechanical properties were tested.
Table 2 shows the mechanical properties and Erichsen values.
Table 3 Factors and levels of 4 3 16(4 2 )L × orthogonal table Factors Levels 1 2 3 4 A RUB pass 2 4 6 10 B Annealing temperature (°C) 135 200 260 300 C Radius of support (mm) 0.5 1 1.5 2 D Holding time (min) 0 15 30 60 E RUB angle (º) 90 120 F Tensile force (N) 60 100 G Lubricated surface Yes no Range analysis indicates that factor B and F have great effect on Erichsen value of the magnesium alloy sheet after RUB in this experiment.
Table 5 shows the mechanical properties along 0º, 45º and 90º orientations.
Online since: April 2018
Authors: Suthee Wattanasiriwech, Darunee Wattanasiriwech, Ju Hak Lee
Effects of oxidation treatment on mechanical and thermal properties were subsequently explored.
2.
However all reinforced foams showed superior mechanical properties to the matrix foam.
Other key properties such as mechanical properties and thermal conductivity of the prepared foams were in acceptable range to serve the designed purpose.
Nguyen: Physical and mechanical properties of lightweight aerated geopolymer, Construction and Building Materials, 79 (2015) 236-244
Adamsk, Mechanical properties of geopolymer composites reinforced with natural fibers, Procedia Engineering, 151 (2016) 388 – 393
However all reinforced foams showed superior mechanical properties to the matrix foam.
Other key properties such as mechanical properties and thermal conductivity of the prepared foams were in acceptable range to serve the designed purpose.
Nguyen: Physical and mechanical properties of lightweight aerated geopolymer, Construction and Building Materials, 79 (2015) 236-244
Adamsk, Mechanical properties of geopolymer composites reinforced with natural fibers, Procedia Engineering, 151 (2016) 388 – 393
Online since: April 2013
Authors: Mohd Hilmi Othman, Sulaiman Hasan, Suriati Rasli
This sample was being utilised to analyse the parameters affecting the quality of plastic products, which were warpage and shrinkage.
One of the software is CadMould 3D-F and this project will use this software to prove that CAE is a very useful tool to analyse the main parameter that affecting the quality of injected plastic products, especially integral hinges made from Polypropylene.
By studying the effect of individual factors on the results; the best factor combination can be determined [2].
The next step is to utilize the S/N Ratio and ANOVA approach to identify significant factors.
From the analysis the higher percentages pure sum of factor, the more affects these factors to the samples or product.
One of the software is CadMould 3D-F and this project will use this software to prove that CAE is a very useful tool to analyse the main parameter that affecting the quality of injected plastic products, especially integral hinges made from Polypropylene.
By studying the effect of individual factors on the results; the best factor combination can be determined [2].
The next step is to utilize the S/N Ratio and ANOVA approach to identify significant factors.
From the analysis the higher percentages pure sum of factor, the more affects these factors to the samples or product.
Online since: May 2011
Authors: Rui Jin Zhang, Hao Wang, Shu Guang Luan
This research thought that the key factor to bring about the conclusion is the large initial damage of HSC during notch formation.
This damage property and extent of HSC should be paid more attention since they affect directly the accurate fracture energy test of HSC and safety, adaptability and endurance of the structure[4].
Furthermore, cracking resistance properties of the aggregate itself is distinct [5].
Fracture toughness is also affected by the initial damage during notch formation and concrete flexure strength.
Tianjin City Construction College’s Academic Paper(1997) [3] Arthur H.Nilson, David Darwin:Design of Concrete Structures (WCB/McGraw-Hill,Inc, United States, 1997 ) [4] Yu Shouwen and etc: Damage mechanics (Tsing Hua University Publishing House, China 1997) (In Chinese) [5] Yu Xiaozhong and etc: Fracture mechanics of Rock and Concrete (Central South Industry University Publishing House, China 1991) (In Chinese) [6] S P Shah,SH Ahmad: High Performange Concrete: Properties and Applications (McGraw-Hill, Inc 1994) [7] J.K.Kim,C.
This damage property and extent of HSC should be paid more attention since they affect directly the accurate fracture energy test of HSC and safety, adaptability and endurance of the structure[4].
Furthermore, cracking resistance properties of the aggregate itself is distinct [5].
Fracture toughness is also affected by the initial damage during notch formation and concrete flexure strength.
Tianjin City Construction College’s Academic Paper(1997) [3] Arthur H.Nilson, David Darwin:Design of Concrete Structures (WCB/McGraw-Hill,Inc, United States, 1997 ) [4] Yu Shouwen and etc: Damage mechanics (Tsing Hua University Publishing House, China 1997) (In Chinese) [5] Yu Xiaozhong and etc: Fracture mechanics of Rock and Concrete (Central South Industry University Publishing House, China 1991) (In Chinese) [6] S P Shah,SH Ahmad: High Performange Concrete: Properties and Applications (McGraw-Hill, Inc 1994) [7] J.K.Kim,C.
Online since: October 2012
Authors: Bin Han, Guang De Wu, Xin Hong Guo
According to the experiments study of sulfuric acid saline soil, the formula of compression coefficient with the changes of moisture content, salt content, initial dry density and temperature is presented, and the interaction law between the various influencing factors on sulfuric acid saline soil compression are analyzed in the paper. g@bjjtxy.bj.cn
Introduction
With the rapid development of high-grade highways in China, it becomes increasingly important and urgent to study the engineering properties about special soil.
These factors would affect the compressibility of the sulfuric acid saline soil and make it has its own characteristics.
The level of the factors is seen in Table 1 by regression orthogonal design requirements.
The analysis of the interaction between the various influencing factors on sulfuric acid saline soil compression The interaction between the various factors can be reflected by contour lines.
The interaction of moisture content X1 and salt contentX2 Fig. 1 The interaction of moisture content X1 and salt content X2 From Fig.1, it can be found the following conclusions: (1) Overall, the interaction between the two factors, the main factors affecting the compression coefficient is the salt content ( It is due to the space of contour line is small.
These factors would affect the compressibility of the sulfuric acid saline soil and make it has its own characteristics.
The level of the factors is seen in Table 1 by regression orthogonal design requirements.
The analysis of the interaction between the various influencing factors on sulfuric acid saline soil compression The interaction between the various factors can be reflected by contour lines.
The interaction of moisture content X1 and salt contentX2 Fig. 1 The interaction of moisture content X1 and salt content X2 From Fig.1, it can be found the following conclusions: (1) Overall, the interaction between the two factors, the main factors affecting the compression coefficient is the salt content ( It is due to the space of contour line is small.
Online since: August 2012
Authors: Ya Xin Zhang, Qi Gao, Yin Chang Ma, Xin Jian Zhang, Ting Zhao
Region size (the precision of manufacturing), operating conditions ( pressure and weight ) and strength properties of materials are main factors affected the stress of the skirt support section.
Those factors are independent, random variation in practice.
From Fig10, it is found that working pressure P, the cylinder radius R1, the wall thickness of head T2 and cylinder T1 are three main influence factors which affect the reliability of the supporting region, the work pressure P is very obvious especially.
Others factors, such as the quality of operation, the allowable stress of material are less effect on the reliability.
From figure 11, it is found that the working pressure P is the main reason affecting the failure and the simulation time is enough.
Those factors are independent, random variation in practice.
From Fig10, it is found that working pressure P, the cylinder radius R1, the wall thickness of head T2 and cylinder T1 are three main influence factors which affect the reliability of the supporting region, the work pressure P is very obvious especially.
Others factors, such as the quality of operation, the allowable stress of material are less effect on the reliability.
From figure 11, it is found that the working pressure P is the main reason affecting the failure and the simulation time is enough.
Online since: June 2012
Authors: Jian Wang, Xiang Dong Qi, Li Gang Zhang, Hong Zhu
The results show that the wall-face connective curvature radius is the primary affecting factor of relative density increment and the wall-thickness is less significant; the solid materials added at the intersecting part of the wall-faces produce same effect on elastic modulus.
Many results of these materials elastic properties have been gained by tetrakaidecahedron model, but less study has been done by rhombus dodecahedron model.
In the current work, geometrical model with closed-cell thick edge rhombus dodecahedron is constructed, by finite elements method, the elastic modulus is calculated, and the influence of cell size and relative density on materials elastic properties is gained.
(2) Because single-cell wall-thickness is the secondary factor of relative density increment, formula (2) can be simplified as non-coupling relation that has many advantages and suffices to give enough accuracy.
Conclusions The solid materials which surface tension draws to cell-edge have influence on relative density increment, wall-thickness of cell is the secondary factor; wall-face connective curvature radius of cell is the primary factor.
Many results of these materials elastic properties have been gained by tetrakaidecahedron model, but less study has been done by rhombus dodecahedron model.
In the current work, geometrical model with closed-cell thick edge rhombus dodecahedron is constructed, by finite elements method, the elastic modulus is calculated, and the influence of cell size and relative density on materials elastic properties is gained.
(2) Because single-cell wall-thickness is the secondary factor of relative density increment, formula (2) can be simplified as non-coupling relation that has many advantages and suffices to give enough accuracy.
Conclusions The solid materials which surface tension draws to cell-edge have influence on relative density increment, wall-thickness of cell is the secondary factor; wall-face connective curvature radius of cell is the primary factor.
Online since: September 2016
Authors: Małgorzata Pająk, Tino Kühn
It has been proven that fibers highly improve tensile impact resistance of the matrices [3], what is highly influenced by the properties of fibers [4].
The detailed description of the mixing procedure, properties of cement (CEM I 42.5R) and silica fume can be found in [10].
The rheological properties of the mixes in fresh state, which satisfy the requirements for the self-compacting concrete, are collected in Table 3.
Wang, Experimental study of dynamic mechanical properties of reactive powder concrete under high-strain-rate impacts, SCIENCE CHINA Technological Sciences. 53 (2010) 2435-2449
Ponikiewski, The laboratory investigation on the influence of the polypropylene fibers on selected mechanical properties of hardened self-compacting concrete, Architecture Civil Engineering Environment. 3 (2015) 69-78
The detailed description of the mixing procedure, properties of cement (CEM I 42.5R) and silica fume can be found in [10].
The rheological properties of the mixes in fresh state, which satisfy the requirements for the self-compacting concrete, are collected in Table 3.
Wang, Experimental study of dynamic mechanical properties of reactive powder concrete under high-strain-rate impacts, SCIENCE CHINA Technological Sciences. 53 (2010) 2435-2449
Ponikiewski, The laboratory investigation on the influence of the polypropylene fibers on selected mechanical properties of hardened self-compacting concrete, Architecture Civil Engineering Environment. 3 (2015) 69-78
Online since: September 2016
Authors: Ji Woong Kang, Oh Heon Kwon, Cheol Jun Park
Table 1 Analysis model size and properties of the SOFC stack materials.
This might be affected by mismatch between electrode materials at the PEN structure of SOFC.
The crack tip is more affected by Mode II than Mode I under to the mixed mode crack behavior.
It is verified that in case of All Rib-V26, SOFC is more significantly affected by the electrode interface than the interconnector rib.
It was more significantly affected by the electrode interface.
This might be affected by mismatch between electrode materials at the PEN structure of SOFC.
The crack tip is more affected by Mode II than Mode I under to the mixed mode crack behavior.
It is verified that in case of All Rib-V26, SOFC is more significantly affected by the electrode interface than the interconnector rib.
It was more significantly affected by the electrode interface.
Online since: October 2018
Authors: Yun Zhou, Xiao Qing Zuo, Ya Dong Sun, Bo Xie, Tian Yao Wang, Chao Qun Guo
The volume fraction of CaCl2 and sintering temperature are the main factors that affect porosity of copper foam.
The influence of the content of CaCl2 and the sintering temperatures on the porosity, and the effects of porosity and cell size on the mechanical properties of copper foams were investigated.
High temperature mechanical properties of low alloy steel foams produced by powder metallurgy[J].
Mechanical properties of low alloy steel foams: Dependency on porosity and pore size[J].
Metallic foams: their production, properties and applications [J].
The influence of the content of CaCl2 and the sintering temperatures on the porosity, and the effects of porosity and cell size on the mechanical properties of copper foams were investigated.
High temperature mechanical properties of low alloy steel foams produced by powder metallurgy[J].
Mechanical properties of low alloy steel foams: Dependency on porosity and pore size[J].
Metallic foams: their production, properties and applications [J].