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Horizontal Well of Shale Gas Complex Fracturing Casing Failure Mechanism Yang Shangyu1,2,3,a*, Wang Jianjun1,2,3, Liu Guangxi4 and Han Lihong1,2,3,b* 1State key Laboratory for Performance and Structure Safety of Petroleum Tubular Goods and Equipment Materials, CNPC Tubular Goods Research Institute, Xi’an, Shaanxi, 710077 2Shaanxi key Laboratory for Performance and Structure Safety of Petroleum Tubular Goods and Equipment Materials, Xi’an, Shaanxi, 710077 3Key Laboratory of Petroleum Tubular Goods Engineering, CNPC, Xi’an, Shaanxi, 710077 4CNPC Xinjiang oilfield heavy oil production company, Karamay, Xinjiang 834000, China ashangyuy@163.com, bhanlihong@cnpc.com.cn Keywords: shale gas well; complex fracturing; casing formation; failure mechanism Abstract.
Journal of Natural Gas Science and Engineering, 2015, 25: 159-165
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Materials and experimental procedures The studied material is the 9% Ni steel (base and weld metals).
The welding of these materials for LNG applications determines for a great deal the structural integrity.
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Muhamad, “A new starch-based binder for metal injection molding,” Journal of Materials Processing Technology, vol. 210, no. 6–7, pp. 961–968, Apr. 2010
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However, it was found that the verification of this model, especially the details of the non-proportional deformation behaviors, is not guaranteed for low yield point materials.
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Fig.1 The product's geometric model Fig.2 Gas-assisted molding analysis geometry model GAIM analysis simulations were under these conditions: injection temperature: 230℃; melt injection time: 6 seconds; melt pre-injection quantity: 94%; gas injection pressure: 15 MPa; simulation materials: PP.
Fig.5 Plastic layer thickness ratio Conclusions GAIM filling simulation analysis of FM new truck interior ceiling handle was done by the Moldflow software under these conditions (injection temperature: 230℃; melt injection time: 6 seconds; melt pre-injection quantity: 94%; gas injection pressure: 15 MPa; simulation materials: PP).
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Journal of jilin university. 2004. vol.32(2): p268-271 [9] Introduction to Gas-Assisted Injection Molding System, Gas Injection(H.K.)

The parameters of structure, material and load are inputed to the software which is compiled by VB, and grid labels precision.
Acknowledgements This work is supported by National Nature Science Foundation under Grant(The Ministry of Finance and Education [2009] NO.365).
Zhang, The International Journal of Advanced Manufacturing Technology, 2005, 26 (1-2)
[4] Liu Rongchang, Sun Huadong, Ma Shu-ying, Chen Lidong, Xue Longquan, Journal of Hebei Normal University of Science & Technology, 2009, 23(4), 25-31.
[7] Ming Luo, Journal of Tianjin Vocational Institutes, 2006, 8(5), 53-56.

The simulation software based on molecular dynamics is Forcite module from Material Studio, which is a commercial software and has been used extensively to study characteristics of nano scale materials.
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Stability Analysis of Dump Slope Based on FEM Strength Reduction Method Chao PENG1,a, Dong JI 1, Liang ZHAO1, Zhenyu QIAN2, Fenhua REN1,b 1School of Civil and Environmental Engineering, University of Science and Technology Beijing, Beijing 100083, China 2National Center for Materials Service Safely, University of Science and Technology Beijing, Beijing 100083, China apcisatc@163.com, brenfh2001@sina.com Keywords: Slope stability; Safety factor; Finite element strength reduction; Iterative calculation Abstract.
The material properties are shown in Table 1.
Mining Science Metallurgical, Industry Press, Beijing, 2006
Rock Mechanics and Engineering, Science Press, Beijing, 2002
Modeling and finite element analysis of the nonstationary action on a multi-layer poroelastic seam with nonlinear geomechanical properties, Journal of Mining Science, 45(4) 2009, pp 324-333