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Online since: January 2017
Authors: Mekki Mellas, Djamel Benmeddour, Abdelhak Mabrouki, Messaoud Baazouzi
Moreover, they did not study the influence of the slope height, and Hansen [4] didn’t take account the effect of soil properties.
Also, Gemperline [24] who developed empirical equations for the ultimate bearing capacity factors for a footing on a slope based on centrifuge tests.
The properties of the interface elements are related to the properties of the adjacent soil elements, for the smooth case, the cohesion is set as C=0, these ensures that the shear stress underneath the footing is zero and the displacement of nodes in the horizontal direction is free, while for the rough case C=Cu, it is characterized with normal stiffness Kn =109 Pa/m and shear stiffness Ks =109 Pa/m.
Various geometries and soil properties were considered, the results of the analyses were compared to other available solutions.
Influences of nonassociated flow rules on seismic bearing capacity factors of strip footing on soil slope by energy dissipation method, 2007, pp. 842–847
Also, Gemperline [24] who developed empirical equations for the ultimate bearing capacity factors for a footing on a slope based on centrifuge tests.
The properties of the interface elements are related to the properties of the adjacent soil elements, for the smooth case, the cohesion is set as C=0, these ensures that the shear stress underneath the footing is zero and the displacement of nodes in the horizontal direction is free, while for the rough case C=Cu, it is characterized with normal stiffness Kn =109 Pa/m and shear stiffness Ks =109 Pa/m.
Various geometries and soil properties were considered, the results of the analyses were compared to other available solutions.
Influences of nonassociated flow rules on seismic bearing capacity factors of strip footing on soil slope by energy dissipation method, 2007, pp. 842–847
Online since: March 2014
Authors: Jian Feng Li, Xiu Jie Jia, Fang Yi Li
Introduction
In the transportation and distribution process, the goods will be subject to a variety of external factors, so as to need buffer material packaging.
Because of plant fiber with enhanced effect can be used to buffer package to enhance its strength, toughness and other mechanical properties.
Guo Anfu and other biodegradable materials for biomass degradation and mechanical properties to do the research[10, 11].
The experiment with the mold material used has a low density, high strength, good thermal conductivity properties and corrosion resistance of 7651 aluminum alloy mold, the material has excellent mechanical properties and casting performance.
Mechanical properties of plant fiber starch lunch box simulation and experimental verification[J].
Because of plant fiber with enhanced effect can be used to buffer package to enhance its strength, toughness and other mechanical properties.
Guo Anfu and other biodegradable materials for biomass degradation and mechanical properties to do the research[10, 11].
The experiment with the mold material used has a low density, high strength, good thermal conductivity properties and corrosion resistance of 7651 aluminum alloy mold, the material has excellent mechanical properties and casting performance.
Mechanical properties of plant fiber starch lunch box simulation and experimental verification[J].
Online since: August 2014
Authors: De Jun Xu, Xiao Yang Liu, Hong Jiang, Li Bo Wang
These significant features will be considerable factors in drug carrier design.
Many researches focused on PEG as a plasticizer to PLA to cause the property changes, such as mechanical properties, thermodynamics and polymer processing properties.
However, the PEG modified PLA for drug carrier design with the respect to the unique modification properties has not been well-reported [13-21].
Mechanical test were not done because the mechanic properties is not a main concern in drug carrier system in medicals. 2.
The crystallinity will seriously affect the degradation and therefore the drug release properties, which will be detailed later. 3.
Many researches focused on PEG as a plasticizer to PLA to cause the property changes, such as mechanical properties, thermodynamics and polymer processing properties.
However, the PEG modified PLA for drug carrier design with the respect to the unique modification properties has not been well-reported [13-21].
Mechanical test were not done because the mechanic properties is not a main concern in drug carrier system in medicals. 2.
The crystallinity will seriously affect the degradation and therefore the drug release properties, which will be detailed later. 3.
Online since: January 2014
Authors: Yeong Sant Kuo
Introduction
A201aluminum alloy has the highest mechanical properties among all the cast aluminum alloys, the tensile strength of A201 is even stronger than some wrought aluminum alloys, such as: 6061 and 6050.
Therefore, it is believed that solidus velocity is one of thermal parameters, which will affect porosity formation, but can not individual precisely describe porosity formation during solidification process.
Both of thermal gradient and solidus velocity are affecting the porosity content in A201 aluminum alloy plate castings, but can not individual precisely describe porosity formation during solidification process.
Berry, “A Reexamination of Factors Affecting porosity [5] J.E.
Hatch, “Aluminum Properties and Physical Metallurgy” ch.6, ASM (1984) [6] ASM Metals Handbook “Castings” Vol.15 9th.
Therefore, it is believed that solidus velocity is one of thermal parameters, which will affect porosity formation, but can not individual precisely describe porosity formation during solidification process.
Both of thermal gradient and solidus velocity are affecting the porosity content in A201 aluminum alloy plate castings, but can not individual precisely describe porosity formation during solidification process.
Berry, “A Reexamination of Factors Affecting porosity [5] J.E.
Hatch, “Aluminum Properties and Physical Metallurgy” ch.6, ASM (1984) [6] ASM Metals Handbook “Castings” Vol.15 9th.
Online since: January 2012
Authors: Guo Hong Xia
Research in the Design of the Fuzzy Controller Intelligence of the Measuring and Controlling Apparatus on Water-content in Material Pulp
XIA Guo-hong
School of Mechanical and Electronic Engineering,
Huangshi Institute of Technology,
Huangshi, Hubei, China
e-mail: hslgxgh@126.com
Keywords: fuzzy control system; fuzzy reasoning decision-making; double-factor self-organized fuzzy control; fuzzy control algorithm
Abstract.
There are many elements which affect the water-content of material pulp, therefore it is very difficult to build precise mathematical module.
Ordinarily we use double-factor a1 and a2 to do the modification, hence to change the fuzzy control principle.
Figure 3 is the frame graph of the double-factor self-organized fuzzy control system.
Figure 3 The Frame Graph of the Double-factor Self-organized Fuzzy Control System D.
There are many elements which affect the water-content of material pulp, therefore it is very difficult to build precise mathematical module.
Ordinarily we use double-factor a1 and a2 to do the modification, hence to change the fuzzy control principle.
Figure 3 is the frame graph of the double-factor self-organized fuzzy control system.
Figure 3 The Frame Graph of the Double-factor Self-organized Fuzzy Control System D.
Online since: January 2010
Authors: M. Wagih, M. Shahtout, A. Kady
Different combinations of production
parameters (holding temperature, holding time and coiling temperature) were applied to find the
best combination to achieve the aimed properties.
There are different factors affecting the cooling rate such as the quenching water flow rate, quenching water temperature, strip temperature, strip speed besides strip thickness and also the thickness of thermal barrier that is formed between the laminar quenching water and the strip surface due to the boiling water layer exist.
Fig.2 Typical Stress-Strain Diagrams of the examined samples; Transverse Sample; Thickness = 3.2 mm The following table summarizes mechanical properties and production parameters of the hot rolled strips.
Table 4 Mechanical properties and production parameters of trial The obtained ranges of tensile strength for each thickness showed high tensile strength, however some samples showed out of aim TS as due to relatively high coiling temperature.
§ The strength values of the tested hot strips produced by EZDK are generally fulfilling the requirements given in SPFH 590Y according to JIS G3134 standard however, some samples showed out of aim tensile properties attributed to relatively high coiling temperature
There are different factors affecting the cooling rate such as the quenching water flow rate, quenching water temperature, strip temperature, strip speed besides strip thickness and also the thickness of thermal barrier that is formed between the laminar quenching water and the strip surface due to the boiling water layer exist.
Fig.2 Typical Stress-Strain Diagrams of the examined samples; Transverse Sample; Thickness = 3.2 mm The following table summarizes mechanical properties and production parameters of the hot rolled strips.
Table 4 Mechanical properties and production parameters of trial The obtained ranges of tensile strength for each thickness showed high tensile strength, however some samples showed out of aim TS as due to relatively high coiling temperature.
§ The strength values of the tested hot strips produced by EZDK are generally fulfilling the requirements given in SPFH 590Y according to JIS G3134 standard however, some samples showed out of aim tensile properties attributed to relatively high coiling temperature
Online since: January 2012
Authors: Dong Ming Qi, Lei Yang, Cheng Jie Hu, Hai Yang
The mechanical properties of the triblock copolymers were investigated in comparison to the P(nBA-co-St) statistical copolymers.
Modern polymer science revealed that the synthetic polymer properties (i.e. mechanical, rheology, etc) were dependent on chain sequence structure other than compositions [7].
The mechanical properties were measured by univeral material tester (Shimadzu AG-I) following the method in GB16421-1996.
However, being likely due to the experimental factors, clear microphase-separated morphology was only observed in the sample TC1 (30K-180K-30K).
However, their mechanical properties are quite different.
Modern polymer science revealed that the synthetic polymer properties (i.e. mechanical, rheology, etc) were dependent on chain sequence structure other than compositions [7].
The mechanical properties were measured by univeral material tester (Shimadzu AG-I) following the method in GB16421-1996.
However, being likely due to the experimental factors, clear microphase-separated morphology was only observed in the sample TC1 (30K-180K-30K).
However, their mechanical properties are quite different.
Online since: April 2021
Authors: Jun Bo Liu, Jun Hai Liu, Li Mei Wang
In order to improve the quality and properties of the coating, a certain amount of Ti was added to the plasma cladding Fe-Cr-C coating in the early stage.
Results show that there are many factors affecting plasma cladding, such as material properties, environmental conditions and so on.
These parameters will affect the heating state of the powder, and then affect the macro- and micro-structure morphology of the coating.
Table 1 Quality properties of raw material powder (mass fraction) Powder Ti Cr Al Mn Si C P Cu S Fe TiFe 47.0 - 1.72 1.9 0.2 0.2 0.096 0.1 0.02 Balance Cr - 98.7 0.25 - 0.25 - - - - Balance Fe Purity 99.0wt.%, Particle size <150μm The plasma cladding equipment adopts DRF-1 automatic plasma cladding machine, and the plasma cladding process parameters are shown in Table 2.
Plasma cladding power is a very important parameter in plasma cladding technology, and its change will directly affect the coating’s quality.
Results show that there are many factors affecting plasma cladding, such as material properties, environmental conditions and so on.
These parameters will affect the heating state of the powder, and then affect the macro- and micro-structure morphology of the coating.
Table 1 Quality properties of raw material powder (mass fraction) Powder Ti Cr Al Mn Si C P Cu S Fe TiFe 47.0 - 1.72 1.9 0.2 0.2 0.096 0.1 0.02 Balance Cr - 98.7 0.25 - 0.25 - - - - Balance Fe Purity 99.0wt.%, Particle size <150μm The plasma cladding equipment adopts DRF-1 automatic plasma cladding machine, and the plasma cladding process parameters are shown in Table 2.
Plasma cladding power is a very important parameter in plasma cladding technology, and its change will directly affect the coating’s quality.
Online since: October 2015
Authors: Jie Xiong, Lin Qi, Li Xin Song, Xin Fei Zhao, Chang Jiang Fang, Xing Ran Lin
How might the change in mechanical properties promoted by the Al2O3 adversely affect the physical attributes of the CNFs that are desirable in the first place?
Also, the author did not mention anything about the nanofiber orientation effect for the mechanical properties.
Such as: “Zhang, H., Ding, W., Aidun, D.K., Mechanical Properties of Crystalline Silicon Carbide (SiC) Nanowires, J.
Although these papers focus on the mechanical properties of single nanofiber or nanowire, they are instructive to our study on the mechanical properties of nanofibers films.
Poor mechanical properties of single nanofiber probably result in poor mechanical properties of nanofiber films.
Also, the author did not mention anything about the nanofiber orientation effect for the mechanical properties.
Such as: “Zhang, H., Ding, W., Aidun, D.K., Mechanical Properties of Crystalline Silicon Carbide (SiC) Nanowires, J.
Although these papers focus on the mechanical properties of single nanofiber or nanowire, they are instructive to our study on the mechanical properties of nanofibers films.
Poor mechanical properties of single nanofiber probably result in poor mechanical properties of nanofiber films.
Online since: November 2010
Authors: Feng Lin, Qing Feng Liao, Ai Jing Song, Lin Hong Deng, Xue Mei Jiang
Add beads to cells:
① cells were first cultured with serum, then deprived of serum for overnight prior to experiment. ② add washed beads to each well, incubate at room temperature until the beads adhere to cells. ③ wash the prepared cells with beads twice using PBS, 2min each time. ④ add appropriate IT medium to each well, then measure cell mechanical properties using OMTC.
Cell stiffness increased nearly 4.6 fold after 30 minutes of mechanical stimulation.
We also found that during a persistent external mechanical stimulation, the cell’s internal structure (CSK) rearranged in response, thereby stiffen the cell, and then alter the dynamic properties of the cell.
Fig. 4 Airway smooth muscle cell from SD rat stiffens in response to external mechanical stimulation (a) vs. control without mechanical stimulation (b) 6.
Furthermore, the behavior of cell stiffening in response to mechanical stimulation suggest that mechanical factors play a key role in determining cell dynamic properties, consistent with previously reported experimental result [3, 4].
Cell stiffness increased nearly 4.6 fold after 30 minutes of mechanical stimulation.
We also found that during a persistent external mechanical stimulation, the cell’s internal structure (CSK) rearranged in response, thereby stiffen the cell, and then alter the dynamic properties of the cell.
Fig. 4 Airway smooth muscle cell from SD rat stiffens in response to external mechanical stimulation (a) vs. control without mechanical stimulation (b) 6.
Furthermore, the behavior of cell stiffening in response to mechanical stimulation suggest that mechanical factors play a key role in determining cell dynamic properties, consistent with previously reported experimental result [3, 4].