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For that, different materials were used as armors such as: kevlar epoxy, polyethylene, glass epoxy, steel-1006 and Al2O3 ceramic.
Table 6: Liner materials density.
The next simulation will be about protective shield materials which can use in armored vehicle (shielding).
Simulation process of protective shield materials into shaped charge jet.
References [1] Marc, A.M., John, W., Dynamic behavior of materials, University of California, 1996

And in the cutting of difficult-to-cut materials, water vapor can also act as coolant and lubricant [1].
There are many methods to deal with the machining problem of titanium alloys, although it belongs to difficult-to-cut materials [8].
Table1 Workpiece materials and characters Materials Ti-6Al-4V Chemical composition Al V O Fe C N 6.1 4.1 0.15 0.06 0.01 0.01 Mechanical characters σb [MPa] δ5 [%] ψ [%] 980 14 40 Cutting forces were obtained by 9257A Kistler piezocrystal force sensor and 5007 charge amplifier.
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Zhang, Y.Wang: Key Engineering Materials Vols. 375-376 (2008), p.172- p.176 [8] Y.H.Fan, M.L.Zheng, S.C.Yang: Journal of Shenyang University of Technology, Vol.33(2011) No.2,p.166-171

Homoepitaxial Growth on Si-Face (0001) On-Axis 4H-SiC Substrates Guo-Guo Yan1,a, Xing-Fang Liu1,b, Feng Zhang1,2,c*, Zhan-Wei Shen1,d, Wan-Shun Zhao1,e, Lei Wang1,f, Ying-Xin Cui3,g, Jun-Tao Li3,h and Guo-Sheng Sun1,2,i 1Key Laboratory of Semiconductor Material Sciences, Institute of Semiconductors, Chinese Academy of Sciences, Beijing 100083, China 2College of Materials Science and Opto-Electronic Technology, University of Chinese Academy of Sciences, Beijing 100049, China 3Microsystem and Terahertz Research Center, China Academy of Engineering Physics, Chengdu, 610200, China aggyan@semi.ac.cn, bLiuxf@semi.ac.cn, cfzhang@semi.ac.cn, dshenzhanwei@semi.ac.cn, ezwshuke@semi.ac.cn, fwangl@semi.ac.cn, gcuiyingxin@mtrc.ac.cn, hlijuntao@mtrc.ac.cn, igshsun@semi.ac.cn * fzhang@semi.ac.cn Keywords: on-axis, SiC, chemical vapor deposition, homoepitaxial growth.
General epitaxial growth is performed on off-axis 4H-SiC(0001) substrates, which would raise the cost of materials and devices, reduce the performance and reliability of the device because of the basal plane dislocations reproduction[4, 5].
Acknowledgement This work is supported by Science Challenge Project (No.
Song, Fabrication of 4H-SiC n-channel IGBTs with ultra high blocking voltage, Journal of Semiconductors 39 (2018) 034005
Deviny, Impact of design and process variation on the fabrication of SiC diodes, Journal of Semiconductors 39 (2018) 114001

Suzuki: Materials Science & Engineering A: Structural Materials: Properties, Microstructure & Processing Vol.
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Introduction The materials with nanometric dimensions have several advantages over conventional materials that have been reported to date [1].
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And the ratio of it is different in different materials.
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Material and Experimental Procedure The material used was an extruded age-hardened Al alloy 7075-T6 whose chemical composition (wt%) was 0.09Si, 1.47Cu, 0.25Fe, 0.03Mn, 2.56Mg, 0.19Cr, 5.46Zn, Zr+Ti0.03, 0.03Ti and remainder Al.
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Kuzman, Journal of Achievements in Materials and Manufacturing Engineering, 20(2007), 375-378
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Shoushan Stone is a famous raw material for making seals in China.
The transparent degree of materials is related with its composition and microstructure, so is the Shoushan Stone.
Acknowledgements This work was supported by a grant of the Science-Technology Research and Development Plan of the National Railway Ministry of China (No. 2010J010-E), the Science and Technology Commission Foundation of Shanghai City (No. 08520513100), the Science Foundation of the Education Commission of Shanghai City (No. 09ZZ196, No. 10ZZ127), the Key Disciplines of Shanghai City (P1502, J51504) and Shanghai Institute of Technology (No.
The authors also thank for Qizhong Chen in Shanghai Institute of Technology and Minjiang Yu in Shanghai Institute of Ceramics, China Academy of Sciences for their help in our study.
References [1] Yaming Ji, Danyu Jiang, Tao Feng, Jianlin Shi: Journal of Inorganic Materials Vol. 19(2004), p. 275 (in Chinese) [2] Junfang Liu, Zhenyi Fu, Dongming Zhang, Jinyong Zhang: Journal of Ceramics Vol. 23(2002), p. 246 (in Chinese) [3] Lo Xu, Jun Liang: Journal of Analytical Science Vol. 14(1998), p. 154 (in Chinese) [4] Lei Wang, Lili Jing, Chunxiang Gao, Jing Zhang: Contemporary Chemical Industry Vol. 36(2007), p. 318 (in Chinese) [5] Jingyang Zhang, Mengjuan Chen: Geology of Fujian Vol. 26(2006), p. 72 (in Chinese) [6] Yingying Tang, Deping Tang: Journal of Gems and Gemmology Vol. 10(2008), p. 9 (in Chinese) [7] Xinfeng Wu, Wenyuan Cui: Acta Petrologica Et Mineralogica Vol. 18(1999), p. 186 (in Chinese)

Materials and methods The experimental materials.
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