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Online since: July 2023
Authors: Bassam Abdallah, Walaa Zetoun, Karam Masloub
The structural properties were investigated via X-ray diffraction (XRD) patterns, Rocking Curve as well as Pole figures.
Zinc oxide (ZnO) is an excellent semiconductor with much superior properties.
The substrate effect was surely influenced by the electrical [21], optical [22] and crystallographic properties.
Shen, Zns nanostructures: Synthesis, properties, and applications, Crit Rev Solid State 38 (2013) 57-90
Bologna Alles, Microstructure and mechanical properties of aln films obtained by plasma enhanced chemical vapor deposition, J Mater Sci 44 (2009) 6125-6134
Online since: January 2012
Authors: Denis Carron, Muriel Carin, T. Malot, Patrice Peyre, R. Fabbro, S. Morville, P. Le Masson, M. Gharbi, C. Gorny
For all the experimental conditions (laser Power (W), scanning speed V (m/min), mass feed rate Dm (g/min)), surface properties have been analyzed, considering local melt-pool properties and melt-pool / powder stream interactions.
Thermo-physical properties considered in our calculation for the solid and liquid phase are presented in table 1.
Various factors influence the agglomeration of non-fully melted particles: the powder catch efficiency (40 % to 80 % in our case), which depends on (1) the (melt-pool area / powder stream area) ratio, (2) the transient time tp (=L/2vp) of particles in the melt-pool, (3) the coaxial powder stream – near wall interaction [8].
This suggests that, on Ti6Al4V, the viscosity h (Pa.s), the surface tensions s (N/m), and their thermal variations g=ds/dT, were little to no affected by the O2 content.
Those oxidations were formed during the annealing (post melting + solidification) thermal stage, and did not really affect the melt-pool behavior, and its final shape.
Online since: March 2012
Authors: Yong Jie Shi, Shu Jing Sha, Long Shan Wang
Research on flexible bonnet polishing process method and related technology Shujing Sha1,2,a, Longshan Wang1,b, Yongjie,Shi1,c 1College of Mechanical Science and Engineering, Jilin University, Changchun, 130025, China 2School of Mechatronic Engineering, Changchun University of Technology, Changchun, 130022, China assj-07@163.com, blswang@jlu.edu.cn, cjiesy2007@gmail.com Keywords: Bonnet tool polishing, Precision machining, Core technology.
Among them, reinforcement layer choose fiber cloth of high tensile strength and thin thickness, polishing film used 0.8mm thick polyurethane pad, rubber balloon thickness of 1mm or 2mm, taking into account the mechanical properties and the bonnet inflation pressure are closely related.
Material removal is the essence of the mechanical processing and also the key factor that affects process efficiency and error convergence.
Harbin Institute of Technology have studied on the bonnet polishing properties through a lot of experiments and obtained some achievements.
[5] Ji Shiming, Zhang Li, Jin Mingsheng, Li Yanbiao and Wan Yuehua: Journal of Mechanical & Electrical Engineering Vol.27(2010) [6] Ji Shiming, Jin Mingsheng, Zhang Xian, Zhang Li, Zhang Yindong and Yuan Julong:Journal of Mechanical Engineering.
Online since: January 2009
Authors: Rimvydas Gaidys, Rolanas Dauksevicius, Vytautas Ostasevicius
During modeling it is approximated by an ideal homogeneous cantilever having material properties of bulk nickel.
Because the system surroundings are in equilibrium, the only force component that affects the moving microstructure results from the additional film pressure ∆p.
Quality factors listed in Table 1 indicate that in this particular case the level of air damping is relatively low even at atmospheric pressure.
These results demonstrate that under the effect of squeeze-film damping the quality factors of the analyzed microsystem may be reduced to as low as Q ≤ 1.
It was found that predicted quality factors are in good qualitative agreement with approximate analytical values in the pressure range of 1 ÷ 100 kPa.
Online since: May 2014
Authors: Guo Qiang Sun, Zhi Yong Yang, Jian Xiong Liang, Zhen Bao Liu, Xiu Li Zhang
Furthermore, it was indicated that the steel also presents high fatigue properties and good high-temperature mechanical properties.
In this paper, the strengthening phase, the typical mechanical properties and corrosion resistance properties of the new developed steel were demonstrated and the application prospects and use value of the steel were evaluated comprehensively. 2.
The mechanical properties measurement was carried out in accordance with ASTM E8 and ASTM A370 standard.
Results and discussion 3.1 Mechanical properties Fig. 2 shows the effects of aging temperature on the mechanical properties of steel.
Figure 2 Mechanical properties of USS122 steel, (a) effects of aging temperature on the mechanical properties, (b) the typical relationships between the strength and fracture toughness 3.2 Fatigue property and high-temperature property Fig.3(a) gives the fatigue properties and high temperature tensile properties obtained from the sample with tensile strength of 1960 MPa.
Online since: July 2011
Authors: Samir Ahmad, Izhar-ul-Haq Izhar-ul-Haq
This paper involves a comparative study of numerous composite materials, their properties useful for wind energy application and cost.
However fiber can be only added to a certain extent after which composite’s mechanical properties began to suffer; this is because there isn’t enough resin to transfer the exerted load to the fibers [5].
There are many factors which govern the efficient use of fibers in a matrix which include surface treatment of fiber for good adhesion.
The E in E-glass fiber represents electrical, as it has good electrical properties.
The carbon epoxy has the following mechanical properties used in the analysis[21].
Online since: December 2012
Authors: Xiang Yang Zhao, Xia Yuan, Yun Lou
Research and Design of a Novel Mobile Police Station Xiang-yang Zhao1, a, Xia Yuan2,b and Yun Lou3,c 1,2,3Department of Automobile Engineering, Henan Mechanical and Electrical College, Xinxiang 453003 azxy518168@126.com, b yuanx_tx@126.com, clouyun98@tom.com Keywords: Mobile Police Station, Design, Electrical System, Research Abstract.
Meanwhile, under the premise to meet the strength, lightweight design is adopted realizing the mechanical properties when running at the maximal speed of 24km/h[2]
In the choice of battery parameters, battery type, battery voltage and battery capacity are the main factors considered.
But because of the weight of the battery pack increaing, the weight of vehicle will increase, leading to the increase of the driving resistance, which in turn affects the driving range of the vehicle.
Journal of Henan Mechanical and Electrical Engineering College(In Chinese), Vol.2(2009),p20
Online since: October 2014
Authors: N. Razali, M.T.H. Sultan, Y. Aminanda
Fig. 1: The Area Under the Graph Represents the Absorbed Energy by the Specimens [11] According to Lu and Tongxi (2003) [9], the behaviour of composite energy is affected by several factors, such as the composite material and properties, condition, geometry, and dimensions of the structural component, and finally the test condition.
School of Mechanical, Aerospace and Civil Engineering, University of Manchester
International Journal of Mechanical and Material Engineering, (2010), Vol. 5 (2), 260-267
PhD Thesis, Department of Mechanical Engineering, the University of Sheffield, (2011)
Online since: October 2012
Authors: Le Ping Chen, Xue Dao Shu, Bao Shou Sun, Wen Fei Peng
If the imbalance of tangential force is too large, the billet will produce the distortion [2].Therefore, during the actual rolling asymmetric shaft-parts by CWR, the designers often design the die through their experiences, which will result in trial and error for gaining suited die parameters, and the lack of theory will hinder the smooth progress of the rolling process and affect the mechanical properties of products [3-7].
Therefore, we must fully consider the above factors when establishing FE model so that the rolling procedure in MS-CWR can be expressed more accurate.
(In Chinese) [4] Forging Technology of Mechanical and Electrical Technology: Forging manual(Mechanical Industry Press, China 1987) (In Chinese) [5] W.G.
Online since: March 2010
Authors: Dong Lu, Guo Hua Qin, Yi Ming Rong, Cong Kang Wang
Mechanical micro-cutting is a fabrication method for creating miniature devices with high profile accuracy, surface finish quality at reasonably low cost.
In micro scale, the nose radius could be the same as the grain size and the workpiece material property cannot be looked as uniformity.
The results indicated that the temperature was an important factor in micro cutting due to its influence on the flow stress.
Material Modeling The flow stress is mostly influenced by temperature, strain, strain rate, and other factors.
The material property can affect the cutting temperature and the Mises stress observably.
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