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Online since: May 2011
Authors: Bin Xu, De Gao Zou, Jing Bi, Xian Jing Kong, Tao Gong
Basic soil properties, including gradation and control dry density are shown in Table 1.
Table 1 Grain composition of sand-gravel specimen Control dry density (g/cm3) Grain composition (%) 40~20 20~10 10~5 <5 2.08 32.82 28.76 21.15 17.27 The major physical properties of geotechnical grille used in the study are summarized in Table 2, and the mesh types of geotechnical grille are respectively shown in Figure 1 (a) and (b).
The elongation of geotechnical grille affected brittleness index mainly.
The main factor which influenced the residual strength of sand-gravel was elongation of geotechnical grille, and the strength of geotechnical grille was the second factor. 3.
Effect of geotextile reinforcement on the mechanical behavior of sand [J].
Table 1 Grain composition of sand-gravel specimen Control dry density (g/cm3) Grain composition (%) 40~20 20~10 10~5 <5 2.08 32.82 28.76 21.15 17.27 The major physical properties of geotechnical grille used in the study are summarized in Table 2, and the mesh types of geotechnical grille are respectively shown in Figure 1 (a) and (b).
The elongation of geotechnical grille affected brittleness index mainly.
The main factor which influenced the residual strength of sand-gravel was elongation of geotechnical grille, and the strength of geotechnical grille was the second factor. 3.
Effect of geotextile reinforcement on the mechanical behavior of sand [J].
Online since: October 2007
Authors: Man Sig Kim
This leads to a wide range of studies in metal powder manufacturing,
compaction, sintering, and improvements of mechanical properties of powders.
Green compact maintains its shape by mechanical bonding, which is very fragile.
Mechanical or hydraulic presses with separate movements of multiple punches are used.
Figure 2: Powder Feeding Mechanism In this paper, design of the feedshoe and the number of shakes are considered to be the most important factors affecting the density distributions of P/M compacts.
Green compact maintains its shape by mechanical bonding, which is very fragile.
Mechanical or hydraulic presses with separate movements of multiple punches are used.
Figure 2: Powder Feeding Mechanism In this paper, design of the feedshoe and the number of shakes are considered to be the most important factors affecting the density distributions of P/M compacts.
Online since: August 2013
Authors: Rui Li, Yun Fang Meng, Xiao Hua Zhang
Due to the complexity of composition, severe regional difference, effective on using of construction waste will be affected by many factors.
Through the research of construction performance and mechanical properties of recycled concrete , the results showed that in the same mixture ratio conditions, recycled concrete shows reduced liquidity, good cohesion and water retention.
Usually level many factors such as experiment, using La (BC) orthogonal experiment design.
factors affect are: primary and secondary aggregate varieties, PNF expansion agent, air-entraining jianshuiji, poly (acrylic fibers; Above the optimal combination for A2 C3 B1D1.
Factors in primary and secondary analysis of four factors affect are primary and secondary aggregate varieties, PNF expansion agent, air-entraining Jianshuiji, poly (acrylic fibers; Aggregate varieties had the greatest influence among all the influence factors; For A2 C3 B1D1 experiments the optimal solution.
Through the research of construction performance and mechanical properties of recycled concrete , the results showed that in the same mixture ratio conditions, recycled concrete shows reduced liquidity, good cohesion and water retention.
Usually level many factors such as experiment, using La (BC) orthogonal experiment design.
factors affect are: primary and secondary aggregate varieties, PNF expansion agent, air-entraining jianshuiji, poly (acrylic fibers; Above the optimal combination for A2 C3 B1D1.
Factors in primary and secondary analysis of four factors affect are primary and secondary aggregate varieties, PNF expansion agent, air-entraining Jianshuiji, poly (acrylic fibers; Aggregate varieties had the greatest influence among all the influence factors; For A2 C3 B1D1 experiments the optimal solution.
Online since: February 2014
Authors: L. Krishnamurthy, G.L. Shekar, D. Abdul Budan, B.K. Sridhara
On the other hand aluminium- graphite composites are widely used in tribological applications because of their excellent antifriction properties, wear resistance and antiseizure characteristics.
To determine average flank wear, cutting speed was varied as it is one factor that affects the flank wear the most.
The significance of the factors is considered at a confidence level of 95% (α= 0.05) and the significant effects are labeled.
It is observed from Figures 1 and 2 that both the factors A (speed) and D (% reinforcement) are significant and there is no interaction between the factors when hybrid composites machined with Carbide and PCD inserts.
If the p-values of the factors is less than or equal to α= 0.05, it is concluded that the effect is significant, otherwise the effect is insignificant.
To determine average flank wear, cutting speed was varied as it is one factor that affects the flank wear the most.
The significance of the factors is considered at a confidence level of 95% (α= 0.05) and the significant effects are labeled.
It is observed from Figures 1 and 2 that both the factors A (speed) and D (% reinforcement) are significant and there is no interaction between the factors when hybrid composites machined with Carbide and PCD inserts.
If the p-values of the factors is less than or equal to α= 0.05, it is concluded that the effect is significant, otherwise the effect is insignificant.
Online since: August 2019
Authors: Vikas Upadhyay, Chaitanya Sharma
Different layers of welds were structurally heterogeneous and exhibited changing mechanical properties from one layer to other [15].
Heat treatments alters microstructures and so can improve mechanical properties of friction stir welds [16].
Base metal temper states was found to affect microstructure and mechanical properties of friction stir welds.
Kumar, Effect of welding parameters on microstructure and mechanical properties of FSWed joints of AA7039 aluminium alloy.
Kumar, Heterogeneity of microstructure and mechanical properties of friction stir welded joints of Al-Zn-Mg alloy AA7039, Proc.
Heat treatments alters microstructures and so can improve mechanical properties of friction stir welds [16].
Base metal temper states was found to affect microstructure and mechanical properties of friction stir welds.
Kumar, Effect of welding parameters on microstructure and mechanical properties of FSWed joints of AA7039 aluminium alloy.
Kumar, Heterogeneity of microstructure and mechanical properties of friction stir welded joints of Al-Zn-Mg alloy AA7039, Proc.
Online since: November 2011
Authors: Vladimir Brailovski, Patrick Terriault, Charles Fischer
Therefore a thermomechanical processing aimed at reducing wire dimension without adversely affecting its actuating properties will be developed.
Actuating properties described in [6, 13] will be used as a comparison basis.
Before using these modified wires in a morphing structure, we had to ensure that their actuating properties had not been adversely affected by severe plastic deformation stemming from cold rolling.
A characterization of their actuating properties was undertaken.
Considering that the objective was to find a way to reduce the thickness of the SMA wire without adversely affecting its actuating properties, the data on Fig. 5 a) and b) shows that procedure #3 seems to be the best compromise.
Actuating properties described in [6, 13] will be used as a comparison basis.
Before using these modified wires in a morphing structure, we had to ensure that their actuating properties had not been adversely affected by severe plastic deformation stemming from cold rolling.
A characterization of their actuating properties was undertaken.
Considering that the objective was to find a way to reduce the thickness of the SMA wire without adversely affecting its actuating properties, the data on Fig. 5 a) and b) shows that procedure #3 seems to be the best compromise.
Online since: January 2003
Authors: Bruno Buchmayr
Depending on steel grade, rolling schedule and other processing parameters, the final microstructure
and mechanical properties are predicted.
pearlite colony size Rod rolling wire drawing drawing speed Figure 1: Main influencing factors and processes on the microstructure and corresponding mechanical properties during rod rolling and wire drawing In a second step, plant data were evaluated by multivariate statistics.
In this stage, it was of interest, how materials and processing variables contribute to the final scatter of the mechanical properties.
Meanwhile a variety of steel grades are now produced by thermo-mechanical rolling with improved properties for cold heading usage.
As a consequence of that, the scatter in the mechanical properties could be drastically reduced.
pearlite colony size Rod rolling wire drawing drawing speed Figure 1: Main influencing factors and processes on the microstructure and corresponding mechanical properties during rod rolling and wire drawing In a second step, plant data were evaluated by multivariate statistics.
In this stage, it was of interest, how materials and processing variables contribute to the final scatter of the mechanical properties.
Meanwhile a variety of steel grades are now produced by thermo-mechanical rolling with improved properties for cold heading usage.
As a consequence of that, the scatter in the mechanical properties could be drastically reduced.
Online since: December 2003
Authors: Adriana Bigi, Silvia Panzavolta, Barbara Bracci
The results indicate that the presence of
gelatin accelerates the setting reaction, and improves the mechanical properties of the cement.
In particular, a number of organic and polymeric additives have been used with the aim to improve the mechanical properties of CPCs [4,5].
The control cement exhibits poor mechanical properties even after setting, as shown by the low value of the compressive strength of the samples aged in SBF at 37°C for 7 days (Table 1).
The data support the hypothesis that porosity is a key factor for the control of the mechanical properties of cements [8,9].
The addition of gelatin to α-TCP based cements can be utilized to modulate the setting properties of the cements, and to improve their mechanical properties.
In particular, a number of organic and polymeric additives have been used with the aim to improve the mechanical properties of CPCs [4,5].
The control cement exhibits poor mechanical properties even after setting, as shown by the low value of the compressive strength of the samples aged in SBF at 37°C for 7 days (Table 1).
The data support the hypothesis that porosity is a key factor for the control of the mechanical properties of cements [8,9].
The addition of gelatin to α-TCP based cements can be utilized to modulate the setting properties of the cements, and to improve their mechanical properties.
Online since: April 2008
Authors: Shi Hong Zhang, Zhou De Qu, Qun Zhang, Chen Lei
Temperature evolution is one of the important parameters of mechanical properties of
thin strip products.
However, these above papers virtually deal with hot rolling in single pass without regarding multi-pass interactional factors during hot rolling.
The experiential initial friction factor of bite is 0.3.
At this deformation stage, the rise of the temperature is the combined action result of the two factors: the transfer heat effect of the friction and the deformation and the drop of the temperature due to the heat exchange.
(3) Reduction, friction and heat transfer coefficient strongly affected the distribution of temperature in strip
However, these above papers virtually deal with hot rolling in single pass without regarding multi-pass interactional factors during hot rolling.
The experiential initial friction factor of bite is 0.3.
At this deformation stage, the rise of the temperature is the combined action result of the two factors: the transfer heat effect of the friction and the deformation and the drop of the temperature due to the heat exchange.
(3) Reduction, friction and heat transfer coefficient strongly affected the distribution of temperature in strip
Online since: March 2011
Authors: Yue Xian Song, Cheng Yong Wang, L.J. Zheng, L.P. Yang, Li Xin Huang
The obvious diversity of the different property material’s cutting mechanism brings about the complexity of the PCB material cutting mechanism.
The factor affecting the thrust force in the drilling process analysis is as follows: while the workpiece material, drill material, geometry and cooling liquid are certain, the drilling force is the function of the feed rate f and the drill diameter D factors, that is Ff and Fd.
It is found that the most important variable affecting the thrust force is the drill diameter and feed rate.
Simulations And Experiments On Drilling Pcb Based On Thermo-Mechanical Coupling, Proceedings of the 8th International Conference on Manufacturing Research ICMR 2010. p.129-136 [4] C.C.
Part I: Five stage representation of drilling and factors affecting maximum force and torque, International Journal of Machine Tools & Manufacture 46 (2006) p.70–75
The factor affecting the thrust force in the drilling process analysis is as follows: while the workpiece material, drill material, geometry and cooling liquid are certain, the drilling force is the function of the feed rate f and the drill diameter D factors, that is Ff and Fd.
It is found that the most important variable affecting the thrust force is the drill diameter and feed rate.
Simulations And Experiments On Drilling Pcb Based On Thermo-Mechanical Coupling, Proceedings of the 8th International Conference on Manufacturing Research ICMR 2010. p.129-136 [4] C.C.
Part I: Five stage representation of drilling and factors affecting maximum force and torque, International Journal of Machine Tools & Manufacture 46 (2006) p.70–75