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Online since: December 2011
Authors: Bi Bo Xia, Zi Yu Zhao, Guang Tao Zhou, Su Zhi Zhang
Plasma jet acquisition and image processing technology Ziyu Zhao1,a, Guangtao Zhou1,b, Bibo Xiao1,c and Suzhi Zhang1,d 1College of Mechanical Engineering and Automation, Huaqiao University, Xiamen, Fujian, 361021, China azyzhao@hqu.edu.cn, bzhouguangtao@hqu.edu.cn, cxiaobibo@hqu.edu.cn, dzhangzhs@hqu.edu.cn Key words: Plasma jet, LabVIEW, Image acquisition, IMAQ Vision, Image processing Abstract: Experimental system of CCD real-time acquisition is developed according to high temperature property of plasma jet.
Therefore, jet direct effects the quality of the molten powder and flight characteristics, and thus affecting the shape quality.
(2.3) Where: K is a constant related with the atomic properties; is the particle density; is the particle partition function; as the excitation potential; is the Boltzmann constant; βj,k is the Abel transform coefficient, N is the radial total number of points; is the spectral radiation intensity of the X-direction.
As cost factors taking into account, we selectes general image acquisition card.
Results and analysis In the process of plasma spraying, plasma jet is affected by many factors, including gas type, flow rate and power parameters, which directly affect the temperature distribution and jet flow field.
Online since: December 2013
Authors: Hui Yang, Ting Xie, Wen Juan Yang, Hua Ping Yang
The increase of temperature will cause the polymeric composites softening, melting, crosslinking, decomposing and other complex changes in physical, chemical and mechanical properties.
It also causes the deterioration of friction and wear properties of the polymeric composites.
It has been proved that the temperature has important influence on the friction and wear properties of polymeric composites.
Results and analysis Friction and wear properties.
The combination of these factors led to the seriously plastic deformation of the modified PTFE sample above 200°C.
Online since: September 2007
Authors: Ying She Luo, Song Hua Tang, Ming Zhe Ning, Zhi Chao Wang
The results suggest, the bearing capacity at high temperature is influenced by these three main factors: thermal damage resulted from the elevated temperature, the thermal stresses and the original load.
Introduction The properties of structural materials are greatly affected under high temperature caused by fire, which lead to the damage, failure or even collapse of structures.
Both methods take into account the variety of material properties against temperature, for instance, ultimate strength, yield strength and elastic modulus decrease with the increase of temperature [2, 3], which implies the degradation of material properties.
Thermal damage evolving equation based on residual strength at high temperature As already observed, mechanical properties of materials will decrease with the increase of temperature, and from damage mechanics viewpoint, these degradations resulting from high temperature lead to the forming of holes or defects, which is called the thermal damage.
Analysis: Three factors influence the bearing capacity at high temperature: 1.
Online since: April 2011
Authors: Yi Mei, Fang Ping Wang, Qiao Ying Liu, Yu Tao Mao
And the thermal load is an important factor that controls box deformation to ensure the accuracy and reliability of heavy gear transmission, which can not be ignored.
Heat leads to the components temperature raising and large hot deformation, and gears engage accuracy is affected, then the force on gears engage surface is not homogeneous, it will cause many problems such as driving failure, low reliability, etc [3, 4].
Conclusion The paper established finite element model for heavy mechanical gearbox, and used NASTRAN analysis software to carry out numerical analysis on thermal characteristics.
Mechanical Design and Manufacturing,Vol. 25 (2009) No. 3: p.141
Wind power gear box casing thermal analysis of structural properties(MS Dalian University of Technology,China 2009),p.35-44
Online since: March 2019
Authors: Hai Tao Wang, Nan Lin, Shi Li Li, Yan Long Luo, Jun Qiang Wang, Hai Bin Zhang
The brittle fracture was caused by structural factors.
The brittle fracture was caused by structural factors.
The actual fracture appearance is not only affected by materials toughness, but also structural factors and impact velocity.
The brittle fracture was caused by structural factors.
The brittle fracture was caused by structural factors.
Online since: December 2010
Authors: Takahisa Okamoto, Shogo Yagi, Carlos Aquino
It is necessary to study in detail its behavior and properties to decrease its cost and increase its performance.
Concretes produced with Portland cement and Eco-cement were mixed with gravel, limestone, quartz and molten slag aggregates to compare its properties.
The rest of the tests presents similar results and could not be considered as outstanding factors to affect the concrete strength.
Unfortunately, the molten slag has only 2 main physical properties to accomplish on its JIS standard.
Early, in: Importance of mechanical bond between cement paste and aggregate, edited by R.K.
Online since: April 2003
Authors: Mark I. Jones, Kiyoshi Hirao, Yukihiko Yamauchi, Shuzo Kanzaki, Hideki Hyuga
Si-based nitrogen ceramics, in particular, are predominant candidates for frictional materials because of their excellent mechanical and thermal properties compared with other ceramics.
Crystalline phase, morphology and distribution of grains as well as the amount and distribution of grain boundary phase are supposed to be dominant microstructural factors affecting the tribological properties of Si-based nitrogen ceramics.
In this study, �/� composite sialons with various �/� ratios were fabricated by hot pressing powder mixtures of Si3N4, AlN, Al2O3 and Y2O3, and the relationship between microstructure, mechanical properties and tribological properties of these composite sialons was investigated.
Table II summarizes mechanical properties of the specimens.
The improved mechanical properties in the composites with high �-Si3N4 content should be ascribed to the existence of elongated grains that act as reinforcement.
Online since: October 2010
Authors: Shoko Suyama, Yoshiyasu Itoh
Also, a ceramic matrix composite (C/SiC) manufactured by ECM has remarkable mechanical properties and lightweight performance [3, 4].
Various characteristics of high-strength reaction-sintered silicon carbide, such as mechanical and thermal properties, could be obtained using the flat mirror.
The most important factors that limit the applications of silicon carbide-based ceramics are their low strength and brittleness.
The mechanical properties of the annealed materials were explained on the basis of micro-structural changes and compared to those of the as-sintered materials.
Micro-structural changes of the grain boundary phase were found to be the main factor affecting such improvements [13, 14, 15].
Online since: January 2017
Authors: Thawatchai Kaewkamrop, Chatchai Nimmol
The physical properties of dried okara were analyzed in terms of color and rehydration ability.
In terms of physical properties, it was observed that the dried okara was darker, redder and more yellow than the fresh okara.
Drying temperature seemed to be a significant factor affecting the changes of redness; okara dried at higher temperatures was redder than that dried at lower temperatures.
In terms of physical properties, it was found that the dried okara was darker, redder and more yellow than the fresh okara.
The drying temperature was the dominant factor affecting the color changes of the okara.
Online since: April 2023
Authors: James Mark M. Gallawan, Chosel P. Lawagon
Results demonstrated that both concrete with DRF and DRFC additives have superior mechanical properties, surpassing the controlled specimens.
Physical and Mechanical Properties Test of DRF Linear density & diameter of DRF.
Additionally, the diameter of the fiber can also affect the tensile properties of the fiber.
Compared to reference samples, concrete samples with DRFC have better mechanical properties.
Hao, "Influencing factors on the healing performance of microcapsule self-healing concrete," Materials, vol. 14, no. 15, Aug. 2021, doi: 10.3390/ma14154139
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