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Introduction Polymeric materials are cynosure of multifarious researchers owing to its light weight, corrosion resistance and chemical inertness.
Materials and Methods Materials.
Kanagaraj: Journal of The Mechanical Behavior of Biomedical Materials Vol. 18 (2013), p. 140
Wang: Journal of Bionic Engineering Vol. 11 (2014), p. 144
Mandelkern: Journal of Polymer Science Vol. 22 (1984), p. 407.

Material and Methods Materials.
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Ross: Forest Products Journal Vol.50 No.2 (2000), p.35-40
Samali, K: Journal of Wood Science Vol.53 (2007), p.394-400
Guitard.: Wood Science and Technology Vol.36 No.3 (2002), p. 367-383

The size of the beam is 710mm × 20mm × 3mm and the material is 45#.
The material properties of the beam are listed in Table 1.
Table 1 Cantilever beam material properties Material Modulus of elasticity Poisson's ratio Mass density 45# 2.1e11Pa 0.3 7800Kg/m3 Fig.4 Mode shapes using FEM: (a) X axis first bending mode; (b) X axis fourth bending mode.
Ribeiro, Cancelation of mass-loading effects of transducers and evaluation of unmeasured frequency response functions, Journal of Sound and Vibration 236 (5) (2000), 761-779
[7] Author: Debao Li Title: "Experimental Modal Analysis and Applications," Publisher: Science Press Publication date: January 6, 2001.

Materials and methods Materials and Reagents.
Ding: Journal of Environmental Engineering Vol. 2 (2008), p. 1483 [2] U.
Fang: Journal of Cellulose Science and Technology Vol. 16 (2008), p. 9 [5] Y.P.
Fang: Journal of Cellulose Science and Technology Vol. 18 (2010), p. 1 [6] Y.
Wang: Journal of Environmental Sciences Vol. 29 (2008), p.1029“In Chinese” [12] Y.C.

Because the rocks is complex internal structure and belongs to the hard brittle materials, rock deformation of the first is physical.
Sandstone physical property parameter table Name Density g/mm3 Compressive strength MPa Tensile strength MPa Elastic modulus GPa Poisson's ratio Sandstone 2.4 45 12.9 8.396 0.23 Today's machine main manufacture material is for 6 cr4mo2w2v, this material has great toughness, easy workability.
Numerical simulation of rock cutting using the discrete element method[J].International Journal of Rock Mechanics and Mining Sciences, 2011,48(3):434-442 [4] Zhang Ke, Wang He, Wu Yuhou, Zhao Kaijun Analysis on Key Wear Technology of the TBM Disc Cutter, Journal of Shenyang Jianzhu University (Natural Science), 2009,25(2);351-354 [5] Zhang Ke, Wang Tengyue, Sun Hong, Wang He, Zhao Kaijun:‘Simulation Study on Disc Cutter of Full Face Rock Tunnel Boring Machine’, [J].Journal of Shenyang Jianzhu University (Natural Science),2010,26,(6),1209-1213
Journal of Shenyang Jianzhu University (Natural Science),2012, 28,(1),156-161
[7] Wu Yuhou, Wang Chao, Sun Hong, Zhou Peng:‘Ansys-based finite element analysis on cutter-plate of rock excavators’, [J].Chinese Journal of Construction Machinery, 2010,10,(2),171-176.

Journal of Porous Materials, 1996(2):207-213
Journal of Porous Materials, 2001, 32(2):121-123.
Journal of Materials Heat treatment, 2007, 28(6):6-10.
Journal of Forestry Science, 2009, 45(6), 127-132.
Journal of Inorganic Materials, 2004, 19(2):335-34.

Curtis (1996): Composites Science and Technology, vol.56, p.677 – 84
Yang (2002): Journal of Composite Materials, vol.36, p.851 – 71
Haritos (2013): Key Engineering Materials, vol.525-26, p.521 – 4
Chrysanthou (2014), Key Engineering Materials, vols.577-578, p.545 – 8
Shen (2008): Mechanics of Materials, vol.40, p.183 – 94

The dried materials have been made into powder by a grinder and an electrical blender.
The powder material has been soaked in ethanol 200 ml and saved in the dark place for two weeks [9].
Muliani, and Nugraha: Journal of Advances in Materials Science and Engineering, (2010), pp. 1-6
Oskama, G: Journal of Solar Energy Materials and Solar Cells, vol. 94, (2009), pp. 40–44
Arakawa, in: Handbook of Photovoltaic Science and Engineering, edited by A.

However, using catalytic activity of nano-materials can greatly improve the degradation rate.
To promote the practicability, the catalytic materials are coated on a variety of base material's surface, such as ceramics, glass, plastic, etc.
Materials Review, 2000,12(4):23-25
New Chemical Materials, 2007,35:14-16
Journal of Environmental Science, 1996,17(4):33-35

The use of rare earth materials such as samarium as a dopant to metal oxides attracted the scientific community since it has the ability to modify the properties of industrially used metal oxides.
Methodology Materials.
Erwin, “Doped nanocrystals,” Science, vol. 319, no. 5871. (2008) [5] R.B.
Agarwal, “Low field room temperature magnetism and band gap modifications in Sm doped SnO2,” Journal of Materials Science: Materials in Electronics, vol. 27, no. 3, (2016) [11] Y.
Ran et al., “Sm-doped SnO2 nanoparticles synthesized via solvothermal method as a high-performance formaldehyde sensing material for gas sensors,” Journal of Materials Science: Materials in Electronics, vol. 32, no. 7, (2021)