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Materials and methods 2.1 Materials and reagents The α-Al2O3 with an average primary particle size of 30±5 nm was purchased from Aladdin Reagent Co.
Wu, et al: Materials Chemistry and Physics Vol. 91 (2005), p. 370 [8] A.S.
Kang, et al: Journal of Colloid and Interface Science Vol. 350 (2010), p. 530 [9] M.
Thomann: Journal of Applied Polymer Science Vol. 105(2007), p. 2963 [13] W.
Yang: Characterization and testament of polymer materials (China Light Industry Press, China 2008)

Silver Nanoparticles – Graphene Oxide Nanocomposite for Antibacterial Purpose Soon Wei Chook1 a, Chin Hua Chia 1 b, Sarani Zakaria 1 c, Mohd Khan Ayob 2 d, Kah Leong Chee2 e, Hui Min Neoh3 f, Nay Ming Huang4 g 1School of Applied Physics, Faculty of Science and Technology, Universiti Kebangsaan Malaysia, 43600 Bangi, Selangor, Malaysia. 2School of Chemical Sciences and Food Technology, Faculty of Science and Technology, Universiti Kebangsaan Malaysia, 43600 Bangi, Selangor, Malaysia. 3 UKM Medical Molecular Biology Institute (UMBI), Universiti Kebangsaan Malaysia, 56000 Cheras, Kuala Lumpur, Malaysia. 4Faculty of Science, University of Malaya, 50603 Kuala Lumpur, Malaysia.
Krutyakov, Synthesis of oleic acid-stabilized silver nanoparticles and analysis of their antibacterial activity, Materials Science and Engineering: C, 30 (2010) 910-916
Venkateswaran, Synthesis and characterization of stable aqueous dispersions of silver nanoparticles through the Tollens process, Journal of Materials Chemistry, 12 (2002) 522-527
Zhao, Preparation, characterization and antibacterial properties of silver-modified graphene oxide, Journal of Materials Chemistry, 21 (2011) 3350-3352
Pimpan, Optical switch from silver nanocomposite thin films, Materials Letters, 62 (2008) 3361-3363

[2] Ochi Y. and Sakai T 2003 Fundamentals and recent topics on fatigue III: Fatigue of metallic materials in the very high cycle regime Zairyo/Journal of the Society of Materials Science 52 433-439
[3] Lu L. and Zhang W 2005 Review of research on very high cycle fatigue of metal materials Jixie Qiangdu/Journal of Mechanical Strength 27 388-394
[4] Conrad H. 2000 Effects of electric current on solid state phase transformations in metals Materials Science and Engineering A. 287 227-237
Materials Science and Engineering A 527 3040-3043
[18] Lu W.J. and Qin R.S 2016 Stability of martensite with pulsed electric current in dual-phase steels Materials Science and Engineering A 677 252-258

Based Plank’s radiation law, thermal radiation intensity depends on radiation wavelength and material temperature.
Dai: Journal of China Jiliang University Vol. 17 (2006), p. 95
Sønnik: International Journal of Thermophysics Vol. 28 (2007), p. 2145
Tsa: International Journal of Thermophysics Vol. 30 (2009), p. 98
Yuan: International Journal of Thermophysics Vol. 30(2009), p. 220

Lemaitre, Journal of Engineering Materials and Technology 107, 83 (1985)
Gurson, Journal of Engineering Materials and Technology 99, 2 (1977)
Hill, Proceedings of the Royal Society A: Mathematical, Physical and Engineering Sciences 193, 281 (1948)
Barlat, International Journal of Plasticity 22, 1171 (2006)
Habraken, Materials Science and Engineering: A 605, 39 (2014)

According to the characteristic and request of relative motion invariability, model diagram of motion analysis for arbitrary point M of connecting rod journal surface, shown as Fig.2, is set up, where O is rotary center of crankshaft (main journal), O1 is center of connecting rod journal, l is distance between center of main journal and connecting rod journal, r is radius of connecting rod journal, n is rotational speed of crankshaft, S and f are the reciprocating amplitude and frequency.
y M q A r O1 l B q O x n 2Sf main journal connecting rod journal Fig.2 Motion analysis diagram of connecting rod journal surface Simulation Results Effect of Different Parameters.
From experimental analysis of barrel finishing, material removal rate rises rapidly with the depth increase, and basically stable as the depth reaches a given value.
Acknowledgements This project is supported by technique innovation fund of third science and technology enterprise (2003) with ministry of science and technology and finance ministry(03C26211300493) and science and technology foundation of ShanXi(2007031158) References [1] Z.W.
Yang: Key Engineering Materials，Vols. 359-360 (2008), pp.394-398

Parvin: Journal of Materials Science Vol. 16 (1981), p. 1796
Park: Journal of Applied Polymer Science Vol. 89 (2003), p. 3115
[9] American Society for Testing and Materials, ASTM D 790-10.
[10] American Society for Testing and Materials.
[11] American Society for Testing and Materials.

The results showed that different materials correspond to different strength theories.
The Application of the Intensity Theory Equation-(3) applies not only to brittle materials, but also to ,ie, some plastic material When λ =1.At this time equation-(3) is the twinτ2 Yield Criterion.
Compared with some concrete experimental data, the twin shearing strength theory of two parameters is feasible in the strength analysis of concrete materials .So it improves and enriches the concrete material strength theory.
References [1] Shengji Jin, Ning Li, Yongqin Rui,et al.Research on Mechanical Characteristics of Blasting Vibration during Tunnel Excavation[J].Journal of Shenyang Jianzhu University (Natural Science), 2012,28(1): 66-71.
Journal of Shenyang University of Technology.2004,26(3):330-336.

The stress, displacement and acceleration of the lining in different materials are got.
The three models have same rock and fault material, but the lining materials are different.
When using c40 as lining material, the displacement decreased 27% at the position of fault, but increasing 1700% at the tunnel entrance. 3 conclusions Three finite element models are built by using different earthquake-resistant materials.
Acknowledgement This research was supported by Grants No. 2007A02 from the Basic Science Research Foundation of the Institute of Engineering Mechanics, CEA , by Grants No.200808022 from special funds of earthquake industry, and by Grants No.HXKQ200605 from youth found of Harbin university.
Failure Characteristics and Influence Factor Analysis of Mountain Tunnels at Picketer Zones of Wenchuan Earthquake[J].Journal of Engineering Geology. in Chinese 200816(6):742-751 [5] WANG Mingnian.

Some references can be found of the research of improving materials fatigue and fracture life.
Du et al researched the repairing effect of damaged materials 40 Cr steel by intermediate annealing and the quenched [7,8].
Reversing Effect of Electric Current Pulse on the Damage of 45 Steel, Chinese Journal of Materials Research, Vol.14, 2000,No.1, 29—36 [2] Han jingtao, Zhao gang, Cao qixiang.
Chinese Journal of Acta Metallurgica Sinica, 1996.vol.32,No.7,213-218 [3] Shen yifu, Zhou benlian, He guanhu,etc. exploration of a new approach to improve fatigue property of materials I-an increased fatigue life of low carbon steel, Chinese journal of material research, 1996.vol.10,no.2:165-166 [4] XIAO Suhong, GUO Jingdong, WU Shidin, HE Guanhu, LI Shouxin.
International Journal of Materials Science and Engineering A. 478 (2008) 93–100 [12] V.V.