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With the progress of viscoelastic materials and damper structures, viscoelastic dampers are gradually used in earthquake engineering.
Parameters of Viscoelastic Dampers The properties of viscoelastic material have significant dependence of time, e.g. the material stress is not only a function of strain value, but also a function of strain history.
Loss factor η equals the ratio of shear loss modulus to shear storage modulus, which serves as an index to measure the energy dissipation capability of viscoelastic materials.
The area of viscoelastic material layer is 70mm by 40mm, and the thickness is 5mm.
Acknowledgements This work was financially supported by the National Natural Science Funds (51178250), Independent Scientific Research Project of Tsinghua University (2010Z01001) and The science and technology program of Beijing municipal education commission(KZ201110005009) .

Results and Discussions Solvent Extraction is a process which involves extracting oil from oil-bearing materials by treating it with a low boiler solvent.
It can be applied directly to any low oil content raw materials.
It can also be used to extract pre-pressed oil cakes obtained from high oil content materials.
Applied Mechanics and Materials, 393 (2013) 729-734
Journal of Chromatography 827 (1998) 21–29

Moreover through chemical reaction, all industrial chemical processes are designed to transform cheaper raw materials to high value products.
Khonsari, Theory of hydrodynamic lubrication involving the mixture of two fluids, Journal of Applied Mechanics, 61(3) (1994) 634–641
Szeri, Lubrication with binary mixtures: liquid-liquid emulsion, Journal of Tribology, 115(1) (1993) 46–55
Szeri, Lubrication with binary mixtures: liquid-liquid emulsion in an EHL conjunction,Journal of Tribology, 115(3) (1993) 515–522
International Journal of Heat and Mass Transfer, 96 (2016) 525-534

In civil engineering, stress releasing method is widely used in metal materials, especially for steel material.
Prestress technology and materials and equipment(Second Edition).
PCI Journal,1995,40(6):76-85.
Transportation Science & Engineering, 2007, 31(5):922-924.
China Journal of Highway and Transport, 2002,15(2):76-78.

Additionally, a good number of materials are necessarily employed in the oil exploitation, so the pollution will be more serious if an error occurs to the selection of materials.
These can be mainly reflected from the following four aspects: Protecting Environment In contrast to the early stage, the raw materials consumed by the oil industry in the modern society are increasingly more; the utilization efficiency of the engineering materials is reduced constantly.
Journal of Nanjing University of Science and Technology, 2009,35 (12): 33-35
Journal of Zhengzhou University, 2009, 28(11):71-73
[5] Zhu Jianzhang.Current Situation of China's Building Energy Conservation Materials [J].

Adamiec, The assessment of impact of construction factors on weldability of MSRB alloy, Materials Science Forum 690 (2011) 37-40
Rzychoń, The intermetallic phases in sand casting magnesium alloys for elevated temperature, Materials Science Forum 690 (2011) 214-217
Khomamizadeh, The effect of different content of Al, RE and Si element on the microstructure, mechanical and creep properties of Mg–Al alloys, Materials Science and Engineering A 523 (2009) 1-6
Pekguleryuz, Cast magnesium alloys for elevated temperature applications, Journal of Materials Science 29 (29) 5259-5271
Ding, Effect of flux containing YCl3 on the yttrium loss, mechanical and corrosion properties of Mg-10Gd-3Y-0.5Zr alloy, Materials Science and Engineering A 527 (2010) 1510-1515

The method is based on a layer-by-layer deposition of biocompatible materials successively forming a scaffold for living cells.
Materials such as polylactic acids (PLA), hydroxyapatite and bioactive glasses are in common use [1].
Therefore, the other candidate materials were investigated as additives to the main substance.
The materials typically used in the FDM approach are thermoplasitc polymers such as ABS and PLA.
The materials requires adequate heating of the extruder.

Preliminary Investigations on Preparation of Cu-Al Bi-metallic Tubes Using Swaging-Diffusion Method Qingle Hao1,a, Jingtao Han1,b , Jingjie Song1,c, Shuai Ji1,d 1 School of Materials Science and Technology, University of Science and Technology Beijing, Beijing 100083, China a qlhao0205@126.com, b hanjt@ustb.edu.cn, c songjingjie1223@163.com, d carven0910@sina.com Keywords: Bi-metallic tube, Swaging-diffusion method, Cu-Al, Formability, Failure.
These micro cracks may be caused by materials slipping at the initial stage of deformation.
Owing to inhomogeneous plasticity between oxide layer and matrix, materials in this area tend to separate.
And cupreous materials flowing towards head end are much more than aluminous materials.
Hossein-Zadeh: Materials and Design Vol. 38 (2012), p. 147-153 [6] V.

Introduction The research in polymer materials is increasingly focusing on the development of inorganic-polymer composites, which have attracted a great deal of interest from material scientists since their applications have dramatically improved material properties in engineering plastics, enhanced rubber, coatings, and adhesives[1-3].
Experimental Materials.
There are peaks at 3600,2880, 1460, 758 cm-1 in the LDPE and the composite materials.
Reviews on Advanced Materials Science Vol(6), 2004, p.169
Journal of Polymer Science Part B: Polymer Physics Vol.36, (1998), p.789

Introduction The growing demands of materials with high temperature capability in industries such as thermal power plants, transportation and materials processing have increased dramatically since early 1900s [1].
Materials with the necessary capability were rarely available and the importance of high temperature materials in determining equipment performance and reliability was gradually appreciated [2].
High temperature materials research in the metals and alloys area is still an extremely important field, and new alloy and composite materials are continually being developed for new applications.
In materials science and technology, high temperature can be defined as a temperature equals to, or greater than, approximately two-thirds of the melting point of a solid.
Rahman, Powder material parameters establishment through warm forming route, Materials and Design 32 (2011) 264-271.