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As well known, the engineering structure size and its service efficiency depend largely on the material yield strength.
Experiment The material used in the experiments was cut from X80 Pipeline steel.
All the material constants were determined from the simple tension stress-strain datum.
It is clearly that the material remains elastic deformation in the middle of the specimen and is in yield state near the surface of the specimen.
Journal of Mechanical Engineering Science.

Research on the Impact of Surface Characteristic of Paper on Digital Printing Color Reproduction HUANG Xuelina School of Light Industry, Zhejiang University of Science and Technology, Hangzhou, 310023, China ahzpigeon@126.com Keywords: surface characteristics; density; digital printing; hue error; color reproduction; grayscale Abstract.
Paper as a major printed materials, is one of the decisive factors affecting the printing quality [1].
Researching the relationship of paper surface properties and printing gamut, choosing the paper according to print materials(include ink), print requirements and print process have a significant meaning for ensuring the print quality and on demand print[ 2-3 ].
Experimental Experimental equipment and materials.
References [1]　SUN Zhonghua and MA Fengqiu: Packaging Engineering Vol. 5 (2007), p. 82-83 [2]　 ZHAO Chenfei: Packaging Engineering Vol. 6 (2008), p. 73-74 [3]　 LI Xiaochun:Study on the Relation Among the Performances of Paper and Printing Matter Tone and Colour Reproduction (Information Engineering University, Zhengxhou 2001) [4]　Kelvin Tritton: Colour Control in Lithography (Printing Industry Press, Beijing 2006) [5] XU R,FLEMING P D,PEKAROVICOVA A,et al:.Journal Imaging Science and Technology Vol. 6 (2005), p.660-666 [6] JIANG Lei and ZHAO Zhongliang: Packaging Engineering Vol. 3 (2008), p. 66-68 [7]　SHEN Jingyi:Probability and Mathematical Statistics(Higher Education Press, Beijing 2005)

Modeling needs to set up unit type and material properties; loading and solving need to select the mode extraction method, setting the acceleration of gravity and activate prestress effect.
Mode simulation .The total length of 224m of the self-anchored suspension bridge designed by certain institute, the span ratio of main cable is 1/8, the center distance of bridge is 124m, the total height of the main tower is 32m, with C20 concrete material; the width is 11.4m, with C30 concrete materials; main cable and galvanized steel wire is rope slings, respectively 88mm and 35mm in diameter.
Material properties shown in table 1.
Acknowledgement Fund Project: Province Natural Science Research Projects Of Colleges and Universities in Jiangsu (No: 08KJB460006, Jiangsu “Provinceblue Project” Funding(No: 08QLD002), Science and Technology Projects in Xuzhou (No: XJ09079) .
Wang: Journal of Sound and Vibration Vol. 27 (1998), pp.731-742 [4] X.C.

Materials and Methods Binder.
This is due to the best dispersibility of basalt mineral fiber in mixture, which could make the fiber and binder to form a composite material in good high-temperature stability [4].
Asphalt mixture is a complex temperature-sensitive material.
(in Chinese) [4] Hui Wang: Study on influence of different fibers on pavement performances of SMA (Changsha University of Science and Technology, Changsha 2007).
Journal of Materials Science, Vol. 40(2005), p. 87

Preparation of Poly(Phenylene Sulfide)/Carbon Nanotubes Composites Yuliang An a, Chen Zhang b , Xia Yuanc , and Qingyi Hou d College of Materials Science and Engineering, Shenyang Ligong University, 6 Nanping Zhong Road, Shenyang 110168, China aanyuliang@yahoo.com.cn, bzhangchen12345@163.com, cyuanxia_mail@yahoo.com.cn, dQingyihou@163.com Keywords: PPS.Carbon nanotubes.Mechanical property.Electrical conductivity Abstract.
CNTs sample for TEM (JEM 2000EX) analysis were prepared by dispersing a small amount of fiber-like black materials in ethanol with mild sonication for 5 min.
Results and discussion Fig.1 SEM image of CNTs prepared by CVD method After CVD experiments that were conducted in the range of 9000 oC, a homogeneous and dense black film was formed on the surface of quartz substrate at all temperatures. the film-like black materials are quite uniform, consisting of long nanofibers with a length up to millimeter scale.
Fu: Composites Science and Technology Vol.69 (2009), P. 147
Tan: International Journal of Modern Physics B, Vol.23 (7) (2009), P. 1529.

Wang3, c 1School of Materials Science and Engineering, Harbin Institute of Technology, 150001, China 2Harbin Welding Institute, Harbin, 150080, China 3Civil Aviation University of China, 300300, Tianjin, China aemail, jixiao_wang@163.com bemail, jfsun_hit@263.net cemail, zpwang@cauc.edu.cn *Corresponding author.Tel.:+86-451-86413904; E-mail address: jfsun_hit@263.net (J.
Experimental and materials Chemical compositions of 6061-T6 and Ni-20wt.
%Al ( wt.%) Materials Ni Zn Ti Mn Fe Mg Si Al 6061-T6 - 0.25 0.15 0.15 0.7 0.8-1.2 0.4-0.8 Matrix Ni-20wt.
New York: Elsevier Science & Technology Books，2007, pp. 14-16
Journal of Chongqing University of Technology，24(1) (2010) 92-98.

Study on simulation experiment with universal pass rolling deformation for heavy rail Lin Chen1,a, Kexin Bi1, b 1Materials and metallurgy institute, Inner Mongolia university of science and technology, Baotou 014010, China achenlin39805@163.com, bcfbkx_1985@163.com Keywords: heavy rail; universal rolling method; ANSYS/LS-DNYA Abstract.
The finite element model Model material parameters.
In element type and the selection of material model, Select SOLID164 unit as element type of rolling and workpiece in model, both roll of material model and simulate of blooming mill are rigid body, workpiece is nonlinear inelastic piecewise linearity model, The physical parameters is the data of lead at room temperature[2].
Table 1 Constitutive parameters of material material Density(kg·m-3) Young modulus (MPa) Poisson's ratio rolling 7.9×103 3.0×105 0.29 Industrial pure lead 1.134×104 1.7×104 0.42 Material stress-strain curves of industrial pure lead show in Figure 1 Figure 1 The stress - strain curve of lead Figure 2 Universal pass geometry and in room temperature meshing According to universal pass system with heavy rail rolling, establish the geometric model of finite element and mesh shown in Figure 2: Simulation procedures.
[2] Lizhong Liu,Xianghua Liu and Guodong Wang:Journal of Northeastern University (natural science), Vol.3(2001),p.327-330

Furthermore, harbour sediments represent one of the most difficult materials to be treated because of their muddy and pasty characteristics and their great geochemical complexity [2].
Materials and Methods Sediments.
References [1] C.N.Mulligan, R.N.Yong and B.F.Gibbs Journal of Hazardous materials Vol. 85 (2001) p. 145
[2] H.Seidel, C.Löser, A.Zehnsdorf, P.Hoffmann and R.Schmerold Environment science and technology Vol.38 (2004) p.1582
[7] A.Guevara-Riba, A.Sahuquillo, R.Rubio, G.Rauret The science of the total environment 321 (2004) p. 241

Interaction Between Carbon Nanotube and Mg Surface: ab-initio Investigation Jianfeng Wan1,a* , Yanqiong Fei2,b , Jiannong Wang1,c 1 School of Materials Science and Engineering, Shanghai Jiao Tong University, Huashan Road 1954, Shanghai 200030,China 2 Research Institute of Robotics, Shanghai Jiao Tong University, Huashan Road 1954, Shanghai 200030,China a jfwan@sjtu.edu.cn, b fyq@sjtu.edu.cn, c jnwang@sjtu.edu.cn Keywords: Ab-initio; Carbon nanotube; Magnesium; Electronic structure; Interface Abstract: ab-initio calculations on the interaction between the single-walled carbon nanotube (SWCN) and the Mg (0001) surface have been reported.
Introduction Magnesium alloys are currently the lightest alloys used as structural metallic alloys, and Mg products have been applied for structural uses such as automobile parts and electric appliance cases, such as hydrogen storage materials [1].
Acknowlegements This work was supported by the National Natural Science Foundation of China, Grant No. 50301011 and 50571066 and this grant is gratefully acknowledged.
Cong, et al.: Chinese Journal of Materials Research, 16(2002), 342

Thus, the optical properties of Cu4N, which are useful for technological applications of Cu3N film materials, also attract great attention.
Table1 The crystal structure data of Cu3N and Cu4N Material Group (No.)
Generally, metallic materials are characterized by low values of n and high values of k .
Solid State Sciences.
Journal of Alloys and Compounds.Vol.330–332 (2002),P.348 [10] Gordillo N, Gonzalez-Arrabal R, lvarez-Herrero A A´ and Agull´o-L´opez F.