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Evaluated metal materials are regarded as DMUs.
GCr15 and 1Cr18Ni9Ti are hard-to-machine materials.
Acknowledgment This study was supported by National Natural Science Foundation of China (50305023).
Naveen: Journal of Retailing Vol. 74 (1998), pp.89 [5] Y.H.
He: Comprehensive Evaluation (Science Press, China 2000).

Ibn Sina, Agdal Rabat, Morocco alhoucineboutahar@gmail.com, bk.elbikri@ um5s.net.ma, crbenamar@emi.ac.ma Keywords: Non-linear vibrations, functionally graded materials, Annular plates.
Furthermore, functionally graded materials can be designed to achieve particular desired properties and the gradation in properties of the material can optimize stress distribution.
The continuity in the material properties of these new materials provides better mechanical behavior in comparison with the fiber-reinforced composites.
Woo et al. [12] provided an analytical solution for the nonlinear free vibration behavior of plates made of functionally graded materials.
[3] J.N.Reddy, Zhen-Qiang Cheng, Frequency correspondence between membranes and functionally graded spherical shallow shells of polygonal plan form, International Journal of Mechanical Sciences 44 (2002) 967–985

Vormwald, Considering size effects in the notch stress concept for fatigue assessment of welded joints, Computational Materials Science 64 (2012) 71-78. [ 5 ] K.H.
Sosnovski, Statistical model of a deformable solid with a critical volume and some of its applications, Strength of Materials 22 (1990) 626-632. [ 12 ] P.
Sempruch, Experimental verification of the analytical method for estimated S-N curve in limited fatigue life, Materials Science Forum 726 (2012) 11-16. [ 13 ] T.
Sempruch, Determination of the fatigue properties of aluminum alloy using mini specimen, Materials Science Forum 726 (2012) 63-68. [ 14 ] T.
Sempruch, Verification of the fatigue test method applied with the use of mini specimen, Key Engineering Materials 598 (2014) 243-248. [ 16 ] T.

Composition of the Testing Materials.
The materials of municipal solid waste are divided into three parts: incompressible solid waste material, reinforced material that is easy to be biodegraded and the material that is easy to be biodegraded.
The contents of the waste materials are given in Table 1.
Shi, in: Journal of Hohai University (Natural Science Edition). 29(B12) (2001), p. 131-134 [5] S.
Li, in: Journal of Chongqing University (Natural Science Edition). 29(8) (2006), p. 6-19 [7] X.

In order to improve the catalytic efficiency, stability and the light absorption capacity of the nano-TiO2 materials, many methods(such as doping, grafting light absorption unit, and impregnating, etc) were used to modify them in recent years[4-7], such as making the TiO2 absorbed to porous materials surface, and the light absorption unit grafted to solid nano-TiO2 surface, etc.
Based on these characteristics of CNT, wide concerned was aroused as soon as it was maded, and the TiO2 composite materials loaded with CNT(TiO2-CNTs) were scale used.
Journal of Agro- Environment Science.
Journal of Anhui Normal University (Natural Science) Vol. 28(2005), p. 61-64.
Journal of Anhui Normal University (Natural Science Editon) Vol.32(2005), p.367-369.

The basic research on numerical simulation of Bimetal composited T-tube through Hydraulic bulging WANG Hui-feng, HAN Jing-tao, zhang Hui School of Material Science and Engineering ,University of Science and Technology Beijing ,Beijing 100083,China Key words: Bimetal tube,T-tube,Hydraulic bulging,Numerical simulation Abstract:Bimetal composited tube is constituted by two different metals.
This article is to make full use of the advantages of numerical simulation to analysis the influence of various parameters on the forming and gain the influence law [6-8]. 3.1 Materials Selection In this paper Copper tube is selected as the medial metal and Steel tube is selected as the lateral metal.
Journal of University of Science and Technology Beijing. 2008, 30(11): 1255-1259 [3] ZHAO Weinin.
Journal of Materials Processing Technology, 2003.139(1-3):58~63 [7] Muammer K, Taylan A.
Journal of Materials Processing Technology, 2001.108:384-393 [8] YU Xin-hong,WANG Hui-feng, ZHENG Yan-li .

Journal of materials science. 1983:1899-1911 [7] John Banhart.
Progress in Materials Science 46(2001):559-632 [8] Zhang Ming, Zhu Guoyin, Yao Guangchun.
Journal of Materials Science. 18(1983):1899~1911 [13] Kathryn A.
Materials Science and Engineering A 293(2000):157~164 [14] Kan Yingan, Zhang Junyan.
Materials Review.

Progress in Materials Science, 2012, 57(7): 1191-1334
Journal of magnetism and magnetic materials, 2010, 322(3): 366-374
Pinho, Performance of Radar Absorbing Nanocomposites by Waveguide Measurements, Materials Research-Ibero-American Journal of Materials, 11 (2008) 319-324
Wang, Effect of aluminum substitution on microstructure and magnetic properties of electrospun BaFe12O19 nanofibers, Journal of Materials Science, 48 (2013) 1702-1710
Litvinov, Barium hexaferrite nanoparticles: Synthesis and magnetic properties, Materials Science and Engineering B-Advanced Functional Solid-State Materials, 176 (2011) 8-13

Mucken, Proceedings from Materials Solutions Conference.
Santella, Structure-properties relations in spot friction Welded (also known as friction Stir Spot Welded), Journal of Materials Science and Engineering , A441(2006) 79-96 [11] K.
Materials and Design, 33(2012) 545-550 [14] M.K.
Sanjeev, Effect of Process Parameters & Tool Geometries on Properties of Friction Stir Spot Welds, Universal Journal of Engineering Science, 3(2015) 6-11 [18] M.K.
Okamoto, Material flow during friction stir spot welding, Materials Science and Engineering A, 527(2010) 4389-4398 [20] A.M.Takhakh, S.J.

Introduction The use of composite materials is widely increasing in applications due to a number of advantages over other materials.
References [1] Jones, R., 1999, Mechanics of composite materials, Taylor & Francis Inc
G. , 2004, "Strain rate effects on the mechanical properties of polymer composite materials," Journal of Applied Polymer Science, 94, pp. 296–301
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-M., Werner, B.T., Fenner, J.S., "Mechanical behaviour and failure criteria of comosite materials under static and dynamic loading," Proc. 50th AIAA/ASME/ASCE/AHS/ASC Structures, Structural Dynamics, and Materials Conference.