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Online since: April 2014
Authors: Dong Qing He, Jing Ge Wang
Under the influence of multiple factors, it is difficult to find the law of concrete properties changed by mixed material properties.
Formulation factors: Based on the reference paper [3-4], while according to the test of cross-shell concrete, choose water-cement ratio, cementitious materials and sand ratio as study factors, respectively three test bit-level (horizontal), as shown in Table 1.
Mix tests and results According to the factors in the order listed, bit-level condemnation, cross to see the principle of the test conditions, arrange the factors and levels in corresponding position of the orthogonal table, and then formed with the test schedule, Table 5.
Conclusions When the type and dosage of admixture were selected, water-cement ratio was the most important factor to affect the strength of concrete, Cementitious materials and sand ratio is an important factor to affect its workability, fly ash and silica fume can significantly improve the workability of concrete, fly ash increases the slump of concrete, and silica fume added reducing the slump of concrete greatly.
[6] GB/T50081-2002: Standard for test method of mechanical properties on ordinary concrete (Building Industry Press, China 1999)
Online since: May 2011
Authors: Zhi Shan Yuan, Yu Juan Wang, Hong Mei Zheng
The influencing factors and characteristics of each synthesis method are discussed.
The main affect factors in laser ablation were the carrier gas, the surface morphology of target, laser intensity, the pressure in growth chamber, growth time and growth temperature.
The main affect factors in process of synthesis SiNWs by CVD method were environmental pressure, temperature, catalyst and catalyst’s particle characteristics.
The main affect factors in synthesis SiNWs by thermal evaporation were evaporation temperature, environmental pressure, carrier gas and others.
Irradiation time and power were the important factors affect nanowire’s diameter and shape [31].
Online since: May 2015
Authors: Ji Hwan Kim, Jung Hwan Kim, Seok Joo Kang
Table 1 is the material properties of the ring, and Table 2 shows the result compared with the previous data for the perfect ring to check the validity of the natural frequency for mode.
In this study, material properties of silicon ring is as follows In Figure 2, two types of graphs are shown due to the Coriolis force by direction of rotational motion.
But with fast backward rotation, Q-factors are reversed.
Thus, these factors should be considered when designing resonator.
Fig. 2 Q-factors of ring with rotational speed.
Online since: October 2014
Authors: Elena Manuela Stanciu, Mihai Vasile, Adrian Catalin Pavalache, Gabriel Marius Dumitru, Raúl López, Dan Petre
The use of laser cladding (LC) technology for the improvement of surface properties in various mechanical design applications has given rise to the development of application-oriented composites.
Properties such as hardness, wear resistance, and strength are influenced primarily by the WC grain size and volume fraction and, in the case of laser cladded coatings, also by varying the porosity and (often unintentionally) the carbide and binder phase composition.
Materials One of the best methods by which the mechanical properties of the deposited layer can be improved is reducing the grain size of the grain size of the material.
Table 3 Penetration and heat affected zone extent measurements Exp.Set.
At high heat input values the tungsten carbide tends to grow thus improving the consolidation effect upon the microstructure of the cladded layer, further investigations in terms of microhardness and tribological properties will be achieved for further papers.
Online since: January 2016
Authors: Wan Hua Zhao, Jun Zhang, Yong He, Yi Fei Jiang, Hong Guang Liu
Therefore, the mechanical properties of previous models are merely calibrated under quasistatic condition.
Calibration of the DEM model for mechanical properties The properties of DEM model are directly related with the meso-parameters, e.g.
So the model should be calibrated to ensure the equivalent properties with cast iron.
The comparison of properties between model and cast iron Mechanical properties Young’s modulus E [Gpa] Poisson’s modulus υ Compressive strength σ [Mpa] Density ρ [kg/m3] Cast iron 103.5~129.7 0.23~0.25 620~765 7340 DEM model 110.8 0.217 678 7335 Fig. 3 Numerical modeling of SHPB test Fig. 4 Stress-strain curve of the model under 2526s-1 Oblique plane impact test.
Oblique plane impact test was conducted to further examine the dynamic properties of the model.
Online since: December 2018
Authors: Lars Erik Lindgren, Jessica Gyhlesten Back
Larger deformation above 30 % reduces the effect of the mechanical stabilisation due to increase in martensite nucleation sites.
Factors that affect the martensitic transformation are chemical composition [3], grain size [4], cooling rate [5], applied elastic stress [6], and dislocations and grain boundaries [7].
Discussion The earlier given references show that deformation of austenite at high temperatures causes competing factors affecting Ms.
Our results indicates that mechanical stabilisation of the austenite dominates.
Also the fact that the sample holders made by aluminium oxide have a large relative heat expansion affects the measurements.
Online since: May 2024
Authors: Andoko Andoko, Riduwan Prasetya
The additional variables that determine tensile strength involve agronomic factors and tree ages.
Based on the test results on the fiber makeup, various components of SF, especially lignin, hemicellulose, cellulose and others, had a significant impact on the fiber's form, mechanical properties, and physical properties.
This, in turn, took part a significant role in affecting the treatment's effect on the Ra value.
The effective implementation of alkali treatment, facilitated through proper bleaching techniques, results in improved mechanical properties and raised visually pleasing attributes.
Study of the Effects of Alkali Treatment and Fiber Orientation on Mechanical Properties of Enset/Sisal Polymer Hybrid Composite.
Online since: September 2011
Authors: Xin Ya Yang, Chao Li, Jiang Hong Wu
Ordinary architectural sand showed a round, smooth surface and perfect rheological properties,but it was hardly bonded with gelled material.
In Fig. 2, the mechanical strength is shown for the influence using different sand as coarse filler.
However, the admixture dispersion and slag powder hydrated activeness were the main factors that affect the shrinkage of the cement mortar.
Fig.4 Effect of slag sand replacement on drying shrinkage properties of mortar Conclusions Calcium carbonate sand presents higher strength values than that of others because the structure of mortar was produced more densification.
Effect of superfine slag powder on cement properties[J].
Online since: March 2010
Authors: Yuan Gang Wang, Fu Ling Zhao, Jin Wang, Meng Hua Wu
Lateral and edge wear of electrodes in micro-EDM affects workpiece shape accuracy.
There are many factors that influence EDM precision, the most influential property is electrode wear.
End wear causes errors in the electrode length estimation, side wear affects the shape of the hole created.
And, debris removal act as suspended powder will induce powder mixed EDM in the side gap, these factors destine that electrode wear is inevitable in µEDM.
ZrB2 is known to have many superior properties such as high melting temperature, high hardness, corrosion-and oxidation-resistivity and high electrical conductivity, being used for aircraft or rocket components working at an especially high temperature.
Online since: August 2022
Authors: Cao Son Nguyen
To understand role of slag in the pellet, this research examines the mechanical, chemical and microstructure properties of the pellets containing various amount of the slag.
To examine the properties of the pellets, a cold compression strength test of the fired pellets was carried out using the mechanical test facility.
Tổ chức tế vi của mẫu quặng viên sau nung M Pore Pore To find out factors affecting the strength of the pellet, observation of microstructure of the fired pellets was necessary.
The attentions have been payed for the factors such as porosity, structure, etc. that affects the reducibility of the pellet.
The properties of the pellet containing the slag were examined in this research.
Showing 6601 to 6610 of 25903 items