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Numerical Analysis for Bolt Length Based on the Stress Response of Anchorage Surrounding Rock Bin WANG1,2, a, FuJun ZHAO1,b and WenBin PENG1,c 1School of Energy and Safety Engineering, Hunan University of Science and Technology, Xiangtan China 2Hunan Key Laboratory of Safe Mining Technique of Coal Mines, Xiangtan China awb21c@sina.com, bzfjxxn@263.net, cwenbinpeng@163.com Keywords: anchorage surrounding rock; bolt length; tangential stress.
As far as load transfer mechanism is concerned, bolt loads could be transferred to the surrounding rock by the bond-friction-occlusion function between bolt body and anchoring material.
For the convenience of finite element analysis, red shale is regarded as Drucker-Prager material.
Homoplastically, concrete is treated as elastic material, its elastic modulus and poisson ratio is respectively 28.5 GPa and 0.2.
Acknowledgements This work was financially supported by the National Natural Science Foundation of China(50974059) and Doctor Research Start Foundation of Hunan University of Science and Technology(E51173).

The measured errors are compensated in real time in consideration of the thermal expansion coefficient of the specific material and the corresponding structure.
Cho: "FE Analysis According to Hinge Condition of Micro Stage for Micro Cutting Machine", Key Engineering Materials Vol. 274-276 (2004), pp. 343-348 [2] H.
Chetwynd: Foundation of Ultra Precision Mechanism Design (Gordon and Breach Science Publishers, 1992) [4] D.
Keith Bowen: Development in Nanotechnology (Gordon and Breach Science Publishers, 1992) [5] H.
Nakazawa: Principles of Precision Engineering (Gordon and Breach Science Publishers, 1994)

Initial Pitting Behavior of LY12 Aluminum Alloy In Simulated Marine Atmosphere HAN Desheng1, a , GUO Min2, b , LI Di 1, c 1School of Material Science and Engineering, Beijing University Of Aeronautics and Astronautics, Beijing 100083, China 2 ATC-China Alcoa (China) Investment Company, Ltd, Beijing 100004, China a desheng@mse.buaa.edu.cn, b min.guo@alcoa.com, clidi@buaa.edu.cn Keyword: initial pitting; LY12 aluminum alloy; simulated marine atmosphere corrosion Abstract: By analyzing morphology, weight gain, pitting depth, potential and AC impendence in corrosion course, initial pitting behavior of LY12 aluminum alloy in simulated marine atmosphere was studied.
In initial pitting course of LY12, open circuit potential changed little and Nyquist graph had the characteristic of adsorbent resist system. 1Introduction LY12 aluminum alloy (corresponds to USA 2024) is regarded as a representative structure material, which widely used in navigation equipments in China.
In this paper, initial pitting behavior of LY12 in simulated marine atmosphere was studied. 2 Experimental methods LY12CZ aluminum alloy with the thickness of 4.5mm was selected as experiment material.
References [1] Naixin Xu, Lingyuan zhao, Cuihong Ding, Chengdian zhang, Runshen Li, Qingdong zhong: Laboratory observation of dew formation at an early stage of atmospheric corrosion of metals, Corrosion Science Vol. 44(2002) p.163-170 [2] M.Morcillo, B.Chico, L.Mariaca, E.Otero: Salinity in marine atmospheric corrosion: its dependence on the wind regime existing in the site, Corrosion Science Vol. 42(2000) p.91-104 [3] GB3190-82：The chemical composition of aluminum and aluminum alloys machining manufactures
[4] HU Yanling, LI Di, GUO Baolan: Study on Evaluation of Localized Corrosion of 2024T3 Aluminum Alloys with EIS, Journal of Beijing University of aeronautics and astronautics Vol. 27(2001)

Because the supplier is familiar with raw materials, which is used by manufacturer to develop a product, the research and develop efficiency will be improved and the whole supply chain will get more profit with less input and risks.
[4] Qing Zhou, Deming Zeng, Xiaojing Wang: Journal of Hunan University (In Chinese), (2004) 31(1), p.108 [5] Zijian Zhang, Wei Liu, Wanjun Zhang: Research Policy, (2008) P. 95-101
[7] Van Hoesel S, Romeijn H E, Morales D R: Management Science, (2005), p. 1706-1719
[8] Fumero F, Vercellis C: Transportation science, (1999), p. 330-340
[9] Lode Li, E.L.Porteus, H.T.Zhang: Management Science, (2001), p. 1539-1551

So it is necessary to search for new types of fiber materials, in order to realize the reinforcement effect for cement concrete at lower cost.
Raw Materials and Mix Proportion of the Test.
Vol. 35 (2000), p. 20-25 [2] Dangfeng Zhao, etc: Advantages of Basalt Fiber Reinforced Concrete Structures/The Second International Conference on Advanced Textile Materials & Manufacturing Technology, 2010, p.218-222 [3] Xiaomei Shen, etc: Shandong Textile Science & Technology, Vol. 3 (2007)
[8] Holister.G.S, Thomas.C: Fibre-reinforced Materials.
[9] J.P.Romualdi, G.B.Batson: Proc·ASCE, Vol. 89(1963), p. 147-168 [10] J.P.Romualdi, A.Mandel: ACI Journal, Vol. 6(1964), p. 567-670

At present, solid host materials mainly include crystal matrix and glass matrix.
These have seriously restricted crystal substrate conversion materials development.
First, batches are prepared by accurate weighing and intensive mixing raw materials.
Kaddouri, PbO-Bi2O3-Ga2O3-BaO Glasses Doped by Er3+ as Novel Materials for IR Emission, Opt.
Fluorescence enhancement induced by the presence of small silver particles in Eu3+ doped materials, J.

The two failure modes of excessive release of tritium, that is tritium effusion through the materials wall and tritium leakage through the broken parts of the materials or the parts of failure seal.
Components or subsystems Tritium containment materials of pipeline, vessel, etc.
Seal failure of component; damage of containment materials.
Leak detection, nondestructive test on the materials, avoid too much fluctuation of temperature and pressure; avoid damage to containment materials.
Journal of Fusion Energy Vol. 12(2006), p. 47–55 [9] I.

The arc discharge method in the liquid phase gives the opportunity to obtain a wider spectrum of materials by varying conditions of their synthesis.
Most of them, such as, for example, dendrimers, fullerine, nanotubes, nanowires and nanopores, are produced from a limited number of types of raw materials.
And nanopowders can be made from hundreds of different materials.
They should be well combined with structural materials, filtered and pumped, do not form a foam when in contact with air.
Conclusion The distinctive feature of the discussed method of synthesis of nanostructured carbon materials is a very fast synthesis, which enabled us to obtain non-catalytical nanostructured carbon materials.

Machining a Micro-scale Structure Using an In-house Developed Miniature Machine Tool SYAIMAK Abdul Shukor1, a 1School of Information Technology, Faculty of Information Science and Technology, Universiti Kebangsaan Malaysia, 43600 Bangi, Selangor, Malaysia asyaimak@ftsm.ukm.my Keywords: micro-scale structure, micro-milling, miniature machine tool Abstract Custom-built Miniature Machine Tools (MMTs) are now becoming more popular with the demand for reduced energy consumption and workshop floor when machining small/medium batch size micro-components.
According to Hansen et al. [4], among the advantages of MMTs are the decrease of heat deformation of machine tools with subsequent reduction of their sizes, decrease of material consumption for machine tool construction (more expensive material with better properties can be used), decrease of vibration amplitudes and decrease in space and energy consumption.
TiAl6V4 was selected as the workpiece material to generate the micro-component demonstrator.
[3] Liu, X., DeVor, R.E., Kapoor, S.G. and Ehmann, K.F., The Mechanics of Machining at the Microscale: Assessment of the Current State of the Science.
Journal of Manufacturing Science and Engineering, 2004. 126: p. 666 - 678

Chemical Durability of Yb doped Lead Tellurite Glass: Effect of Solution pH Khaidzir Hamzah1,a, M.Abdullah Izat Yassin1,b, Md.Rahim Sahar1,c, Sib Krishna Ghoshal1,d, Ramli Arifin1, Md.Supar Rohani1,e 1Advanced Optical Material Research Group, Department of Physics, Faculty of Science, Universiti Teknologi Malaysia, 81310 UTM, Johor Bahru, Johor Darul Ehsan, Malaysia akhaidzir@utm.my, bgutoylert_23@yahoo.com, cmrahim057@gmail.com, dsourasib@gmail.com, emdsupar@utm.my Keywords: Tellurite glass; aqueous solution in glass; glass corrosion; FTIR spectroscopy Abstract.
Acknowledgement The authors gratefully acknowledge the technical support of Faculty of Science, UTM, the financial support from Ministry of Higher Education (MOHE) under vote GUP 04J67 for managing the grants.
Kaneko, An ion exchange model of glass leaching, Journal of Materials Science Letters 4 (1985) 631-634