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Silica, namely precipitate SiO2, has the characteristics of high purification, low density, high specific surface area and fine decentralization, and also has high optics and mechanism capability, so it has been widely used in many fields, such as activator carriers, compound materials of macromolecule, electronic encapsulation materials and fine ceramic materials [3-6].
References [1] Dongmin An, Yupeng Guo, Yanchao Zhu, et al., Chemical Engineering Journal. 162 (2010) 509-514
[4] Federica Bondioli, Luisa Barbieri, Anna Maria Ferrari, et al., Journal of the American Ceramic Society. 93 (2010) 121-126
[6] Azadeh Tadjarodi, Marzieh Haghverdi, Vahid Mohammadi, Materials Research Bulletin. 47 (2012) 2584-2589
[7] Yan Liu, Yupeng Guo, Wei Gao, et al., Journal of Cleaner Production. 32 (2012) 204-209

The element of the two materials in contact often occur penetration.
In this paper the direct contact algorithm is adopt to simulate joint system of a CFRD and a method to determine the coefficient of friction between the materials in contact is proposed.
The constitutive model used for dam materials is EB model [9].
Wang: Journal of Computers and Geotechincs.
[8] Clough C W, Duncan J M: Journal Soil Mech.

For long-term safely burying of HLW they are consolidated into various materials [1].
Such materials include glass ceramics and various types of mineral-like ceramics.
The Synorc materials are obtained by the method of Combustion Synthesis (CS)[2].
Test materials.
Kay Engineering Materials, 217(2002) [2] ZHANG Rui-zhu.

and are the volume occupied by solid materials and its upper bound, respectively.
Here, suppose material properties are .
Paulino: International Journal for Numerical Methods in Engineering, Vol. 77(2009), p. 301 [2] N.
Saitou: Journal of Mechanical Design, Vol. 127(2005), p. 34 [3] W.H.
Beckers: International Journal for Numerical Methods in Engineering, Vol. 78(2009), p. 631 [5] J.H.

Zhu et al.: submitted to Journal of Environmental Protection Science (1997） [3] Zhifan.
Zhang: submitted to Journal of Shenyang Jianzhu University (2007) [5] Minghua.
Han, in: Experimental Study on Filtration Materials Using Chicken Feather as the Oil Smoke Purificant, Journal of Environmental Protection Science (2004)
Zhu, in: Decoloring of Dyeing Effluent With Modified Keratin Proteolytic Products, volume 2 of Journal of Sichuan Uion University (Engineering Science Edition) (19982)
Wang, in: Research on Preparation and Decolorization of Feather Keratin Decolorizing Agent, volume 10 of Journal of Science Technology and Engineering (2010).

For example, these materials are decomposed by only heating in air.
We propose fabrication technique nano-metal supported materials in liquid-solid systems as newly process.
By selecting and choosing materials and conditions, it is reasonable to expect that this sonochemical process can be extended to obtain various nano noble metal composite materials.
Suslick: Science Vol. 247 (1990), p.1439
Suslick: Science Vol. 247 (1990), p.1067

These FG materials are designed to have unique advantages of both elements.
Multidiscipline Modeling in Materials and Structures 13 (2017) 590-611
Materials Today: Proceedings, 44 (2021) 4531-4536
Materials Research Express 7, no. 2 (2020) 025703
Journal of Mechanical Science and Technology 33, no. 4 (2019) 1761-1767

Journal of Applied Optics, Issue 5(2006), p. 376-379+404, In Chinese
Journal of Tongji University(Natural Science), Issue 10(2007), p. 1425-1429, In Chinese
Journal of Materials Engineering, Issue S2(2009), p. 79-82, In Chinese
Science in China,Ser.A, Vol. 28(1998), p. 373-378, In Chinese
Journal of Beijing Normal University (Natural Science), Vol. 34(special) (1998), p. 35-37, In Chinese

Fatigue and Fracture of Engineering Materials and Structures 25 (2001), 755 - 764 [3] R.
Proc. of 16th International conference on composite materials, Kyoto, 2007 [5] A.
Ehrenstein, Polymeric Materials.
Encyclopedia of Materials: Science and Technology, 2001, 9444 - 9449 [12] M.
Materials Testing, 54 (2012), 750-755 [14] S.

These factors will result in the damage of concrete materials, i.e. degeneration of the property of materials.
The strength of damage field (the degeneration of the property of materials) will affect on the operation property of concrete structure.
Over the past, the damage of concrete materials was not considered to analyze the stress-field and displacement-field of concrete structure, and the concrete material of the concrete structure was considered as undamaged materials.
[4] Wang Xiangdong: Some Problems with the Handling of Figures in Experiment of Concrete, Journal of Hohai University (nature sciences) (Special) 1997
[5] Wang Xiangdong: Forecast Long-term Data of Material Coefficient with Grey System Theory, Journal of Hohai University (nature sciences) 1999.12