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Wood can be taken as linear elastic material when deformation is small.
For orthotropic wood, there are three material symmetry axes.
There are three material symmetry axes for a tree.
Material mechanical properties of container and target are shown in table.1.
Arzt: Journal of Materials Science Vol. 41 (2006), p. 5122-5126 [5] M.Gong, I.Smith: Wood Science and Technology Vol. 37 (2004), p. 435-445 [6] P.Trtik, J.Dual, D.Keunecke, D.Mannes et al: Journal of Structural Biology Vol. 159(2007), p. 46-55 [7] W.Z Zhong, S.C Song, X.C Huang, R.Z Xie et al: The 8th International Conference on Shock & Impact Loads on Structures.

Common fillers in UPR formulation are flame retardant (FR) materials which used to reduce flammability of the based polymer [2].
UPR demonstrates poor fire resistance due to their high styrene content and traditional FR materials was made from halogenated ingredients which performed well until toxicity issues became important as these materials release toxic gases and corrosive smoke during fire [3].
Experimental Materials.
Journal of Fire Sciences. 2012 30(4) 318–30
Key Engineering Materials 694 2016 106–110

Research materials and method Experiment materials: electrolytic Cu, Zn, Ni and Al.
Materials Corrosion and Protection.
Advances of Researches on the Dezincification Mechanism of Brass.Chinese Journal of Materials Research, Vol. 13(1)(1999), p.1-8
Correspondence Between Hydrogen Enhancing Dezincification Layer-Induced Stress and Susceptibility to SCC of brass.Materials Science and Engineering, Vol.4(2004),p.51-56
Transactions of Materials and Hear Treatment, 2007, 28(6):104-108

Figure.3-1 Distribution of sizes in Shiwu Fault Depression reservoir Figure.3-2 The relation of hydrocarbon and distribution of grain size Size pattern of clastic rock Fig.4 is the content diversification of Shiwu Fault Depression reservoir interstitial materials.The reservoir interstitial materials are mainly matrix and cement.
Carbonate and shaly are as interstitial materials in Shiwu Fault Depression reservoir clastic rocks,secondly kaolinite. 4.
Sandstone ingredient are low compositional maturity, poor psephicity,good sorting and high percent of cuttings.As a result,depositional environment energy is strong,handling distance is short,far away from parent rock areas.These provide rich materials for secondary pore, conduciving to secondary pore.
References [1] Guomin Fu,Xin Li,Zhilu Liang.Diagenesis and chang 6 formation sandstone and its effect on reservoir property in sanya regions in ordos basin[J].Journal of Xi’an University of Science and Technology,2007,27(3):377～380
[2] Zhenlin Chen,Guoshou Wang,Jun Wang.Diagenesis and Porosity Evolution of Lower Cretaceous Denglouku Formation in southern Songliao Basin [J].Journal of Jianghan Petroleum Institute,1996,18(1):14～17

Experimental Materials.
Journal of the Science of Food and Agriculture, 92 (3). pp. 557-553
Journal of Cereal Science, 48. pp. 319-326
Journal of Food Science, 47. pp. 1534
International Journal of Food Science and Technology, 39. pp. 223-229

Materials and Methods Collection Soil Samples.
Journal of Agricultural Resources and Environment.2014,31:23-31.
Chinese Journal of Soil Science.2002,33(3):202-206 (In Chinese) [13] Y.
Journal of JiLin Agricultural sciences.2004,29(1):38-43 (In Chinese) [17]W.J.
Chinese Journal of Soil Science.1986,17 (2):90-95 (In Chinese)

In numerical analysis, material of the rock is different in the various areas and subarea method can deal with this problem by been given different values to various material property.
The material of each area is considered as Moore-Coulomb plastic body.
Specific materials parameters are in Table 1.
Journal of Chang-an university (natural science edition), Vol. 24 (2004), p. 2.
Journal of rock mechanics and engineering, Vol. 11(2008), p. 27.

Athermalization Design of Wide Field Medium Wave Infrared Optical System Lei Zhao1,a, ZhaoHui Luan1,b YanLing Xiong1,c and LiJuan He1,d 1School of Applied Science, Harbin University of Science and Technology, China azhaoleiwm@163.com, blzhmj5@126.com, cxyling1964@163.com, dhlj6607@163.com Keywords: athermalization, optical design, wide field, infrared optical system Abstract.
For the high optical-thermal expansion coefficients of the infrared materials, the refractive index, radius of curvature and center thickness of the optical element will have the corresponding change when the infrared optical system works under the different temperatures.
Principle of Passive Optical Athermalization Passive optical athermalization is a method using the different optical materials with different optical-thermal expansion coefficients to allocate the focal power, and make the image plane drift close to the length change of lens cone due to the hot-expansion and cold-contraction.
The materials of the lenses respectively are Silicon, Germanium, Silicon, Germanium and Silicon.
References [1] Yaguang Geng and Mingqian Zhang: submitted to Infrared and Laser Engineering (2007) in Chinese [2] Jinqiu Xiao and Shumei Xu: submitted to Journal of Electronic Measurement and Instrument (2004) in Chinese [3] Yanlong Qi and Meng Duan: submitted to Infrared Technology (2009) in Chinese [4] Yan Li and Bao Zhang: submitted to Journal of Applied Optics (2013) in Chinese [5] Xingqiao Ai and Bo Liu: submitted to Proc. of SPIE (2010) [6] Yang Jiang and Qiang Sun: submitted to Acta Photonica Sinica (2013) in Chinese [7] Le Yang and Qiang Sun: submitted to Acta Photonica Sinica (2011) in Chinese

Introduction Glass fiber reinforced composites (GFRCs) are widely used for varieties of engineering applications from automotive to aircraft components because of their significant advantages over the other engineering materials.
Nowadays, the researches about subsurface damage detection are focused on the single phase materials such as optical glass, silicon, sapphire, etc[5-7].However, to date, the subsurface damage detection for GFRCs was rarely reported in the literature.
Senthil Kumar: Journal of Manufacturing Processes. 13 (2011), p. 67-73
Ramachandra: Journal of Materials Processing Technology. 186 (2007), p. 265-271
Dong, et al: Journal of Mechanical Engineering. 49(2013), p. 88-94.

Analysis of Forming Defects and Measures to Prevent Forming Defects of Dn40-type Control Valve Xiujuan Fu 1, a, Hongxia Liu2,b 1 School of Materials Science and Engineering, Wuhan Institute of Technology,Wuhan 430074 Hubei, People’s Republic of China 2 Zhengzhou Institute of Aeronautical Industry Management,Zhengzhou,China,450015 afuxiujuan2008@163.com, bliuhxia@126.com Keywords: Defects; Injection molding; Local structure; Geometry size; CAE; Experiment Abstract.
So the lack material defect will appear here.
References [1] Miguel Pazos∗, Juan Baselga, Julio Bravo: submitted to Journal of Materials Processing Technology (2003)
[5] Y.C.Lam and L.W.Seow: submitted to Polymer Engineering and Science (2000)
[7] L.W.Seow, Y.C.Lam: submitted to Journal of Materials Processing Technology(1997)