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Acknowledgments This work is supported by the Aeronautical Science Foundation of China (Grant No. 2010ZE56014), Science and Technology Research Foundation of Jiangxi Provincial Department of Education (Grant No.
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Each of these elements and subelements has a cross-section consisting of one material or one composite section (Fig. 1-c), and each of the materials of the cross-section has its constitutive material behaviour law (stress-strain curve).
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Fig.1 The structure of H418 impeller Fig.2 The position of the crack on the blade Fig. 3 Blade number (1) Material Properties The material of the impeller is FV520B-I.
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Huang: Journal of Vibration and Shock.

Fast physical and chemical change process of condensed phase researched has been studied by using photoacoustic spectroscopy technology, which provided a new method for analyzing reaction characterizes of energetic materials under laser irritation [8-11].
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Starck GmbH, Goslar 38642, Germany 8 Hyper Tech Research, Inc. 1275 Kinnear Road Columbus, OH 43212, USA 9 Institute for Problems in Material Science of the National Academy of Sciences of Ukraine, 3 Krzhizhanovsky Street, Kiev, 03680, Ukraine 10 Budapest University of Technology and Economics, Budapest, Hungary 1111 Budapest, Egry Jozsef u. 18.
The structure of the materials was analyzed using TEM, SEM, and X-ray diffraction.
The porosity of the materials did not exceed 1 - 3.5 %.
The Raman spectra of the materials (Fig. 4 f) demonstrated the metal-like behavior, the same as superconductors.
Xu: Journal of Applied Physics Vol. 93 (2003), p. 6208 [3] T.

Preface The problem of contact materials subject to relative movement is becoming increasingly important for lifetime of the equipment, pollution and cost in energy.
This can vary considerably depending on the choice of the pair of materials and the experimental device.
The intrinsic mechanical properties of materials are complementary and play a direct role in the tribological process.
The work presented at the ACMA'14 conferences are multidisciplinary, by interacting mechanics, physical chemistry and materials science on a different scale ranging, the goal is to explain, even if the reactions of the contact surfaces are very complex, the basics of tribology, the process of friction and wear, to apply the test methods on the materials in contact and get material coatings on other surfaces by different methods and processes mechanical, physical and chemical.
This special issue of the journal "KEM: Key Engineering Materials" consists of a collection of studies both in the fields of experimental simulation of tribology than the science of surfaces in contact by relative movements in relation to the mechanical properties materials.

[3]C.M.Aldea, et al.: ACI Materials Journal, 2000. 97(5): p. 567-575
[7]Zhong-ping Wang, Ke-ru Wu, and Shi-guang RUAN: Journal of Building Materials, 2001. 4(2): p. 127-131.
Bhargava: ACI Materials Journal, 2007. 104(1): p. 70-76
P.Shah : ACI Materials Journal, 2002. 99(4): p. 379-385
[12] Jun Huang, Hong-dao Jiang: Journal of Hohai University (Natural Sciences), 2006. 34(3): p. 306-310.

As for some components that are directly retrieved for raw materials, dismantling process is also needed.
What's more, a reasonable percentage of the materials are obtained by crushing and sorting, which caused the value of material decreased.
In the meantime, on account of impurity which is mixed in at the stage of crashing and separation, the renewable raw materials acquired in this process have a lower economic value compared to the uncracked materials.
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Vandecasteele: Journal of Hazardous Materials, Vol.190( 2011), p.8-27 [8] Feri Afrinaldi, Muhamad Zameri Mat Saman, Awalluddin Mohamad Shaharoun: Industrial Engineering and Engineering Management(IEEM 2009),p 2261 – 2265 [9] H.Wang,D.Xiang,G H.Duan: Neurocomputing , 2008, 71(13-15),p2720-2726 [10] Xujin,Zhangshuyou,Fei shaomei: Journal of Zhejiang univercity(engineering science), 2011,45(10),p1746-1752 [11] Information on http://www.tms.org/pubs/journals/jom/0308/kanari-0308.html [12] Information on http://www.srl.gatech.edu/education/ME4171/DFR-Intro.ppt

Here we report a new method in producing high-grade rubber racket, in which natural rubber and butadiene rubber were used as main material and auxiliary material respectively.
Experimental Materials.
Table 4 Effect of sulfur content on the mechanical properties of vulcanizate For the natural rubber is a crystalline polymer Material, it still has the crystallization behavior in the NR and BR Combination system.
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Progress of Materials in China 2011, 30(6): 21-27
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