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In the second generation PV, different thin films materials and in particular hydrogenated amorphous silicon have been studied.
They are heterogeneous materials: Si nanocrystals (2 -20 nm in size) embedded in a_Si matrix [5].
Saha: Solar Energy Materials and Solar Cells Vol. 74 (2002), p. 393 [15] D.
Schropp: South African Journal of Science Vol. 105 (2009), p. 290 [17] S.R Jadkar, J.V.
Rath, Solar Energy Materials & Solar Cells Vol. 76 (2003), p. 431 [32] C.

The material properties of the steel tubular members include elastic modulus E = 210 GPa, poisson’s ratio, mass density, and yield strength = 235 MPa.
Journal of Engineering Mechanics.
Journal of vibration and shock. 2006, 25(4):13-17.
Composites Science and Technology .2009, 69(10): 1635-1643
Journal of Engineering Mechanics .2012, 138(10):1215-1223.

UNESCO-IHE, Delft, the Nether lands. 2003. ].It is defined as the total amount of water resources required by all products and services under certain material standard of living, consumed by a country, region or person [[] Gerbens-Leenes P W, Hoekstra A Y, Van der Meer T.
Journal of Hengyang Normal University, 2008, (3): 118－121. ],Chen Hao[[] Chen Hao, Ren Zhiyuan, Guo Bin.
Journal of Glaciology and Geocryology, 2005, (005): 774－781. ]
Journal of Subtropical Resources and Environment, 2008, (001): 62－68. ].So WS can indicate the utilization rate of water resources indirectly.
Environmental Science, 2007, (11): 2432－2437. ] and other related documents.

Böttger1, b 1Delft University of Technology, Material Science and Engineering, Mekelweg 2, 2628 CD Delft, The Netherlands aN.Verma@tudelft.nl, bA.J.Bottger@tudelft.nl Keywords: X-ray diffraction, Pd ultra-thin film, phase transformation, ω-tilt stress, sin2ψ method, grain-interaction, Ti adhesive layer Abstract.
Ying, Journal of Membrane.
Science 203 (2002) 29-42
Wan, The Journal of Adhesion, 83 (2007)
Mittemeijer, Journal of Applied Physics 86(4) (1999)

Journal of Zhejiang University of Technology, (2007), 35(04):8-17
Journal of Wuhan Industry University, (1988), (4):477-486
PCI Journal (2004), 49 (4):102-110
Transportation Science & Technology, (2003), (6):1-4
Journal of Anhui Construction Industry Institute (NATURAL SCIENCE EDITION) ,(2011)，19 (2):15-19.

Tool materials, apart from having to satisfactorily endure the welding process, affect friction coefficients, hence heat generation.
Leitao et al. (2009) investigated the mechanical properties of aluminium alloy friction stir welds with similiar and dissimiliar materials.
Babu, “Predicting tensile strength of friction stir welded AA6061 aluminium alloy joints by a mathematical model”, Materials and Design 30 (2009) 188–193
Materials Science and Engineering A, 528 (2011) 8071–8083
R, “Material flow during friction stir welding (FSW) of the same and dissimilar aluminium alloys”, Journal of Materials Engineering and Performance, 11(1) (2002) 51-63.

First of all it should be noted that the majority of building envelope materials has a heterogeneous structure.
Staritcyna: Increase of energy efficiency for educational institution building, Advanced Materials Research, 953-954 (2014) pp. 854-870
Kazimirova, K.N.Gureev: Increase of energy efficiency of the building of kindergarten, Advanced Materials Research, 953-954 (2014) pp. 1537-1544
Radovic: Fast urban development of Cetinje – old royal capital of Montenegro, Applied Mechanics and Materials, 584-586 (2014) pp. 564-569
Murgul: Features of energy efficient upgrade of historic buildings (illustrated with the example of Saint-Petersburg), Journal of Applied Engineering Science, 12 (1) (2014) pp 1-10

The punch, container and die materials were H13 and punch holder, die holder and pedestal materials were Ck45.
Materials Science and Engineering , 384, 70–76
Journal of Materials Processing Technology , 124, 49–56
Materials and Design , 31, 493-499
Materials Letters , 61, 4110–4113.

The traditional design and calculation method is based on the linear beam theory of material mechanics, and simplifications are made in the design and calculation process.
Establishment of Leaf Spring Finite Element Model Selection of Mesh sand Element Types Leaf spring material is 50CrMnVA; central gasket material is steel 08Al; damping pad material is nylon 66.
The specific material parameters are listed as follows.
Automobile Science & Technology, 2011, 6
Journal of Mechanical Strength, 2005, 27.

In this paper, a minitype belt conveyor’s drive roll is used to as reference, and the finite element of it is set up by ANSYS/Workbench, the material attribute of the model is shown by table1.
Table1 Material attribute Material type elastic modulus/GPa Poisson's ratio Mass density/ Kg•m-3 Q235 206 0.3 7800 45Cr 193 0.28 7850 Modal analysis Vibration equation.
（3） Material is confirmed.
Material and structure are all confirmed.
Finite Element Analysis For Belt Conveyor's Pulley Based On ANSYS[J].Journal Of Taiyuan University Of Science And Technology, 2007, 28(04):307-310