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The maximum dynamic deformations of barriers in the collision process are very different in different forms and materials.
Using the post posts with C-shaped cross section, which saves material comparing with the post with S-shaped or Z-shaped cross section of BRIFEN.
Acknowledgements The study is funded by the Open Fund of Engineering Research Center of Catastrophic Prophylaxis and Treatment of Road & Traffic Safety(Changsha University of Science & Technology), Ministry of Education, and National Science and Technology Action Plan Project (2009BAG13A02), Beijing-Zhuhai double-line Changsha to Xiangtan Highway Resource-saving and Environment-friendly Technology Demonstration Projects (Traffic and Transport Department Traffic and Transport Letter Science and Technology [2009] NO.333), hereby thank.
Journal of Highway and Transportation Research and Development(2006.7), in chinese
Journal of Highway and Transportation Research and Development(2007.3), in chinese.

Noh, Dynamic and quasi-static torsional behavior of tungsten heavy alloy specimens fabricated through sintering, heat-treatment, swaging and aging, Materials Science & Engineering A 247(1-2) (1998) 285-294
Bor, Swaging of liquid phase sintered 90W–7Ni–3Fe tungsten heavy alloy, International Journal of Refractory Metals and Hard Materials 36 (2013) 260-264
Bor, Effect of swaging on microstructure and tensile properties of W–Ni–Fe alloys, International Journal of Refractory Metals and Hard Materials 42 (2014) 126-131
Ramesh, The mechanical properties of tungsten-based composites at very high strain rates, Materials Science & Engineering A 203(1-2) 140-153
Li, Fabrication, characterization, and mechanical properties of 93W–4.9Ni–2.1Fe/95W–2.8Ni–1.2Fe–1Al2O3 heavy alloy composites, Materials Science and Engineering: A 636 (2015) 452-458.

Titanium and its alloy are materials with great application in the aeronautic and biomedical area.
Sánchez, Advanced cutting conditions for the milling of aeronautical alloys, Journal of Materials Processing Technology. 100 (2000) 1–11
Guo, A comprehensive experimental study on surface integrity by end milling Ti–6Al–4V, Journal of Materials Processing Technology. 209 (2009) 4036–4042
Jawaid, The effect of machining on surface integrity of titanium alloy Ti–6Al–4V, Journal Materials Processing Technology. 166 (2005) 188–192
Rodrigues, Experimental and theoretical study of workpiece temperature when end milling hardened steels using (TiAl)N-coated and PcBN-tipped tools, journal of materials processing technology. 199 (2008) 234–244

That provides new method to analyze and investigate mechanical behavior for multilayer composite material such as rock mass with a natural interlayer,finally Index of Anisotropy for rock with a natural interlayer are put forward Introduction I Numerical simulation as an efficient method is widely useded in various fields of science and engineering.
A, Herbert H.Einstein., International Journal of Fracture, 92（1998）221 -252 [2] Bobert.
Wong, K.T., Chau, International Journal of Rock Mechanics &Mining Science, 38(2001) 925-939 [5] R.H.C.
Chau, C.A.Tang, P.Lin., International Journal of Rock Mechanics &Mining Science, 38 (2001) 909-924 [6] Sahouryeh, E, Dyskin, A.V.
Tang, S..H.Wang,Y..F Fu, Numerical test of rock failure process ,Science press,Beijing, 2003

(a) Test for Mode I fracture toughness of Northeast China Larch As standard test procedures of determining fracture toughness KIC of wood have not been established yet, the ASTM guideline for CT specimens of metallic materials (ASTM E399-09) was taken as the reference of the test.
Although Eq. (1) given by ASTM E399-09 is for isotropic materials only, Sih, Paris and Irwin reported that little difference will be introduced when orthotropy is taken into account for a sharp crack [10].
[9] ASTM E399-09 Plane-Strain Fracture Toughness of Metallic Materials.
Croager, Mode II fracture toughness of wood measured by a mixed-mode test method, Journal of Materials Science Letter. 1 (1982) 77-79
Walsh, Linear fracture mechanics in orthotropic materials, Engineering Fracture Mechanics. 4 (1972) 533-541

Alexandrov, Progress in Materials Science. 45 (2000) 103-189
Park, Materials Science and Engineering A. 328 (2002) 98-103
Kim, Computational Materials Science. 43 (2008) 641-645
Qian, Journal Materials Processing Technology. 211 (2011) 590-596
Kazeminezhad, Computational Materials Science. 48 (2010) 166-173

compound, Y7Ba11Cu18Oy(Y7-11-18), has been discovered by solid state reaction with the different ratios of raw materials.
Materials and Methods The Y7-11-18 and Y211 powders were synthesized by solid state reaction method.
The raw materials Y2O3, BaCO3 and CuO in the desired atomic ratio as 7:11:18 and 2:1:1 were used.
Euro Physics Journal.
[7] P.Udomsamuthirun, T.Kruaehong, T.Nilkamjon,S.Ratreng, The New Superconductors of YBaCuO Materials.

Therefore, the monodispersed crystallites of good crystallinity are difficultly agglomerated to the nanostructured materials in the hydrothermal solution.
The inset of Fig. 4(b) confirms that the ZnS microspheres are the typical polycrystalline materials.
Hu, Science. 277 (1997) 1287
Evans / Materials Science and Engineering A. 379 (2004) 351–359
Shirley, Astrophysical Journal. 583(2) (2003) 789-808

Niinomi: Journal of the Mechanical Behavior of Biomedical Materials Vol. 1 (2008), p. 30-42
Lütjering: Materials Science and Engineering: A Vol. 243 (1998), p. 32-45
Soares: Materials Research Vol. 13 (2010), p. 333-337
Grandini: submitted to Journal of Materials Science: Materials in Medicine (2013)
Grandini: Materials Research Vol. 14 (2011), p. 107-112

It is widely used in food, pharmaceutic, cosmetic, biomedical materials and leather industries.
It has potential use in foods, cosmetics and biomedical materials[6].
References [1] Wen Hai shen,Yang Yan ping,Chen Cai fang,Shi Bao. in:Advance in marine science(2010)
[3] Fan Li,Dongying Jia&Kai Yao,Clem: submitted to Journal of Food Science and Technology(2009)
Clem: submitted to Journal of Nutrition(2005)