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Online since: May 2017
Authors: Takahiro Ohashi, Wataru Kimura
The sum of the circumference strain eq, the reduction ratio of wall thickness en, and the meridian strain ej is zero because of the volume constancy law.
Therefore, bulging (i.e., the increment of the circumference strain) must be generated by reduction of wall thickness or development of meridian strain.
The data of a Bi49Pb18Sn12In21 core was compiled from actual tensile tests with strain rate v = 2.00%/min.
Online since: March 2007
Authors: Jie Zhang, Hui Qing Fan, Yun Ze Shi, Mei Tian Bi, Xian Hua Zeng
The primary reaction of this process involves the reduction of an inorganic salt (the precursor) by polyol at an elevated temperature.
Data were collected on an automated diffractometer (X'Pert PRO MPD, Philips, Eindhoven, Netherlands) with CuKα1 radiation (λ=1.5406 Å) and a 2θ range from 30° to 70°.
Fig. 4 Schematic illustrating the growth mechanisms of nanoparticles: (a) the reduction of silver ions into silver atoms by ethylene glycol; (b) the formation of silver clusters; (c) the nucleation of seeds and (d) the growth of seeds into nanoprisms, nanocubes or nanoshpheres Fig. 4 shows the growth mechanism of silver nanoparticles.
Online since: January 2010
Authors: Shan Wei, Chun Juan Ou Yang, Si Min Wei
It can suppress noise effectively, but also can maintain the image details in the process of noise reduction by the means of its multi-resolution analysis.
However, the higher threshold keeps pseudo-Gibbs effect; the lower threshold retains the noise so that the algorithm expected noise reduction cannot be achieved.
Cluster analysis is an important means of data partition.
Online since: October 2014
Authors: Quan Duan, Li Chan Li, Yong Quan Li, Can Liang, Dong Dong Wang
In addition, grains in the overheated zone of SAW were the coarsest with the highest heat input.It can be concluded from the data that with the increase of welding heat input the grain size of overheated zone decrease which may have bad influence on the mechanical properties of the weldment.
However the change was not serious, so it wouldn’t cause performance reduction clearly.
Because the change was not serious and it wouldn’t cause performance reduction clearly, so SAW is fit for thewelding process of 316LN for its high welding speed and efficiency.
Online since: August 2016
Authors: Lívio César Cunha Nunes, Rian Felipe de Melo Araújo, Lécia Maria da Silva Freire
The data chosen to evaluate the importance of each variable were: acid value; saponification; and moisture content of the sample.
After treatment with palygorskite, has been observed that the reduction rate is due to the effective adsorption of free fatty acids present in excess in the frying oil as well as those already present in the crude oil.
The formation of these monomers may be evidenced by a reduction of the amount of linolenic fatty acid present in the frying oil.
Online since: August 2013
Authors: Yun Cheng, Li Li
The Impact Assessment Model of the Port Engineering on the Ecological Environment based on the PSR Model The construction and operation of the port engineering may bring many negative effects, such as damage of the shoreline resources, destruction of the coastal wetlands, reduction of the aquatic organism living space and invasion of the alien species and so on.
Oil spills and waste water into the sea will result in the deterioration of the water quality of the coastal waters, reduction of the biological species and many other damages.
Standardize Evaluation Utilizing the poor standardize formula for data standardization to make the evaluation index dimensionless.
Online since: June 2008
Authors: Wei Hua Li, X.Y. Wang, Xian Zhou Zhang
Introduction Vibration reduction and isolation plays an important role in protecting machinery and structures from unwanted vibration related problems.
Because of the limitations of passive isolation systems and active isolation systems, semi-active system with advantages, such as low energy consumption, low cost, easy to construct and efficient vibration reduction, are drawing more attention.
China), which is driven by a signal source from a power amplifier (YE5871-100W) whose signal is provided by the Data Acquisition (DAQ) board (Type: LabVIEW PCI-6221, National Instruments Corporation.
Online since: April 2009
Authors: Yung C. Shin, Milan Brandt, Shou Jin Sun, John E. Barnes
As shown in Figure 1, a 60% reduction in strength is realized around 500°C.
The results obtained from the machining model compared well with the experimental data in terms of the measured cutting force and the tool wear rate prediction.
Since the dynamic impact on the cutting tool when the rotating tool intermittently engages with workpiece at the entry point causes a significant vibration and tool fracture, laser beam heating at the entry point is more significant in longer tool life and reduction of chatter.
Online since: April 2009
Authors: Feng Li Li, Yong Qiang Zhang, Hui Li Yang, Ping Hui Zhang, Wei Qi Wang, Yu Lan Yang
tensile strength RmMPa) yield strength Rp0.2(MPa) Ductility A5(%) reduction of areas Z%) fracture toughness KIC(MPa.m1/2) Heat treatment regime 1270 1230 10 26 77.8 740°C/0.5hAC+570° C/10hAC 1250 1200 11 28 79.5 1230 1160 8 19 83.2 930°C/0.5hAC+570° C/10hAC 1240 1180 8 18 82.6 b1 b2 a2 a1 As Figure 1 shown, inα+β) solution + aging condition, the optical microstructure is homogeneous bimodal microstructures, which is composed of equiaxial primary α phase and aging matrix; In β phase solution + aging condition, the optical microstructures is the typical aging matrix with straight original β grain boundaries.
The data above show that the new BTi-6554 titanium alloy has good strength and fracture toughness and considerable ductibility.
tensile strength RmMPa) yield strength Rp0.2(MPa) Ductility A5(%) reduction of areas Z%) fracture toughness KIC(MPa.m1/2) Band 1200 1150 11 33 76.8 BTi-6554 1220 1160 10 32 73.5 1150 1100 11 36 68.2 Ti-1023 1170 1120 10 34 64.5 1140 1100 15 42 50.5 VT22 1150 1110 14 40 51.7 Conclusion The new developed BTi-6554 alloy bars show good strength, fracture toughness and ductibility.
Online since: November 2012
Authors: Marco Valente
A satisfactory agreement was observed between numerical and experimental results as regards the bond strength reduction due to repeated cyclic loading.
Numerical results Three-dimensional finite element simulations of the experimental tests were performed and the accuracy of the developed numerical models was evaluated on the basis of the experimental data.
The numerical results were in remarkable agreement with the experimental tests in terms of bond strength reduction due to repeated cyclic loading.
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