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Online since: March 2011
Authors: Xue Jun Li, G.F. Bin, C.J. Liao
Introduction The phenomenon of releasing quickly local energy and generating transient elastic wave in materials is called AE.
Different materials and different AE generating mechanisms can generate various AE signals with different frequency ranges.
Han, The directional Wigner distribution and its application, Journal of Sound and Vibration, 1998, 216(4): 585-600
White, The Analysis of non-stationary signals using time-frequency methods, Journal of Sound and Vibration, (1996) 190(3), 419-447
Chu, Experimental determination of the rubbing location by means of acoustic emission and wavelet transform, Journal of Sound and vibration, (2001) 248(1), 91-103
Online since: August 2011
Authors: Jia Xu Wang, Yan Feng Han, Guang Wu Zhou, Ke Xiao, Yi Qin, Song Wu
The flexible rubber alloy bearing liner is bonded onto copper strips.[2] The geometry of a journal bearing are shown in Fig 2.
Table 1 shows the physical quantity of material attribute.
The geometry of the journal bearing Fig.3.
The rotational axis origin for the journal was set at the eccentricity, which is X=0, Y=0, Z=-e (e=0.4mm, 0.425mm, 0.45mm, 0.475mm, 0.5mm).
The water film was modeled as incompressible fluid, with rotation axis origin and direction same as the journal above.
Online since: January 2022
Authors: Ahmed Majid Salim Al Aamri, Shakila Javed, Yahya Ubaid Al Shamsi, Ihtesham Hussain Mohammed
Introduction Due to the massive and continuous improvements in materials technology especially concrete, new forms of concrete has been introduced.
[6] HSU.T, “Torsion of Structural Concrete,” (1968), ACI Journal
Bernardo, “Cracking and failure mode in HSC hollow beams under torsion,” Construction and Building Materials, vol. 51, pp. 163–178, 2014
PRAT (1988), “Size effect tests of torsional failure of plain and reinforced concrete beams,” Materials and Structures, V. 21, pp. 425-430
LOPES (2008), “Behaviour of Concrete Beams under Torsion: NSC Plain and Hollow Beams,” Materials and Structures, V. 41, pp 1143–1167
Online since: December 2012
Authors: Yuan Yuan Zhang, Fang Qin Cheng
Material Balance and Energy Balance Analysis Material Balance Analysis.
Chou: Journal of Cleaner Production. 12 (2004), p. 725 [3] J.
Wang: Journal of Iron and Steel Research, International. 18(2011), p. 2 [7] R.S.
Yang: New Building Materials. 3 (2003), p. 54-55( in Chinese ) [10] H.
Yang: New Building Materials. 1 (2002), p. 39-41( in Chinese )
Online since: March 2014
Authors: Wen Xing Bao, Xiu Hong Yao
The new algorithm can recognize not only shape features of industrial solid wastes heap but also its material and type and it is constructed to recognize multi-class industrial solid wastes with higher operation efficiency.
University of Electronic Science and Technology of China, 2013.6
Beijing:Science Press,2004
Journal of Earth Sciences and Environment, 2006, 28(2):93-95
Journal of Chang’an University, 2012, 32(5): 34-38.
Online since: May 2012
Authors: Ya Nan Fu, Hai Tao Mao
Because of the cable net structure for glass curtain wall construction and design difficulties, the design of curtain wall performance to deepen the main points of cable net structural wall of the working principle, design connections, cable net structural wall of the cable construction steps, cable pre-stressing and tension when the technical parameters and under the glass curtain wall materials and installation was introduced.
Curtain wall art performance design challenges: pressure deformation; water permeability; air permeability; ventilation and thermal insulation; Single-layer cable net art wall design difficulties: the deflection of single-layer cable net system constraints; cable and horizontal truss connection node; top of the wheel node design; Art wall construction difficulties: the imposition of pre-stressed cable; under glass materials and installation.
The Following Materials and Installation Glass.
Journal of Vibration Engineering, 2006, 19(2).
Journal of Shenyang Jianzhu University (Natural Science), 2005,21(5).
Online since: May 2011
Authors: Xian Su Cheng, Qiu Feng Lü, Zhen Kun Huang, Xiao Xiao Zhao
Experimental Materials.
Di: Materials Science and Engineering A Vol. 324 (2003), p. 287-293 [4] J.
Jin: Materials Science and Engineering A Vol. 368 (2004), p. 71-79 [6] X.
Journal of Materials Processing Technology Vol.120(2002), p.107-110 [8] J.
Jin: Materials Science and Engineering A Vol. 358 (2003), p. 304-309
Online since: September 2013
Authors: Xiao Feng Qin, Da Le Sun, Li Yang Xie
Hertz [13] established the contact stress and semi-contact width stress equation of two rolls contact under 2-D plane strain as below: (1) (2) Where P is the normal linear loading acting on the rolls, R1 and R2 are the radii of the rolls, E1 and E2 are Young modulus of the materials of the rolls, v1 and v2 are the Poisson’s ratio of the materials of the rolls, a is contact width and p(x) is the contact stress at the contact area.
(7) Where σa0 is the range of asymmetrical stress, R is the stress ratio and α is a constant parameters for the materials can be expressed as α=0.226+0.0001Hv [22].
[3] Slack, Trevor S., Nihar Raje, A Review of Rolling Contact Fatigue, Journal of Tribology 131(2009) 041403-1
Schreiber et al, Fatigue and Failure Mechanism of Bearings, Fatigue of Engineering Materials and Structures 1 (1986)85-90 [7] Yu, Wei Kufi, and Tedric A.
[22] Yukitaka Murakami:Metal fatigue: effects of small defects and nonmetallic inclusion,Elsevier Science, 2002
Online since: July 2011
Authors: Miao Yu, Yu Bin Ji, Fang Dong, Shi Yong Gao
Experimental materials Cell and Drugs.
RPMI 1640 cell culture(HyCLone LaboratorLes company); FBS(Holly Biological Engineering Materials Co., Ltd.
Acknowledgment This work was supported by National Natural Science Foundation of China (30902013).
Ji, “Study on Chemistry and Pharmacology of Capparis spionosa polysaccharide,” Journal of Harbin University of Commerce: Natural Science, vol 22, No. 1, pp.5-8, Feb. 2006
Wang, “Study on effects of Aloe polysaccharide on tumor cell membrane function of mice bearing tumor,” Journal of Harbin University of Commerce: Natural Science , Vol 21, No. 1, pp. 11-13, Feb. 2005
Online since: July 2014
Authors: Yin Bai, Ling Feng Gong, Si Qi Li
Journal of Harbin Institute of technology, 2007, 39(6).
Journal of Building Structures. 2005, 26(4).
Building Science, 2006, 22(2): 23-26.
Journal of Building Structures, 2005,26(4):99-105.
Applied Fire Science, 1994, 4(5): 303-323.