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is the mass density at material point , is the displacement of material point at time .
Material Constants for Elastic Material and Ducker-Prager Model Material (GPa) Cohesion(Pa) Friction Angle(°) Dilatancy angle(°) Elastic 32 0.24 -- -- -- 2700 DP Model 30 0.25 0.9E6 42 0 2500 (a) (b) Figure 3.
Acknowledgements This work is financially supported by the Fundamental Research Funds for the Central Universities (WUT: 2013-Ia-033 and 2013-Ia-029), and National Natural Science Foundation of China (U12301013).
International Journal for Numerical and Analytical Methods in Geomechanics, 4(4):333–359, 1980
International Journal for Numerical Methods in Engineering 81, 1242–1258 (2010)

The wide-range use of composites can lead to large savings in materials and energy, and in several instances, reduce environmental pollution.
Materials and Methods 2.1 Composite Materials Fabrication Cast aluminum alloy A357 Al-Si of known materials was used and Al2O3 particles were used for the reinforcement materials.
Some of the properties of matrix and reinforcement material are given in table1 and 2 respectively. α-Al2O3 of average particle size ~75μm has been selected for the present investigation.
Rohatgi, Metal-matrix Composites ,Defence Science Journal, Vol 43, No 4, October 1993, pp 323-349
Rakesh, B.Manjunath ,Effect of Particle Size on Dry Sliding Wear of Cast A356-Al2O3 Metal Matrix Composites, International Journal of Engineering Trends and Technology, 12 (2014) pp. 438-445 [3] L Avinash, T RamPrabhu, Adithya Parthasarathy, KN Varun Kumar, Basavaraj Sajjan, Wear and mechanical behaviour of Hypo-eutectic Al-7%Si-0.5%Mg alloy (A357) reinforced with Al2O3 particles, Applied Mechanics and Materials, Trans Tech Publications,829(2016)pp 66-72 [4] C.

About inner pressure and axial feeding work together to promote the main flow to the manifold in metal materials, and the friction force is blocking head flow to the manifold of metal materials, with the continuous increase of friction coefficient, the metal will be too much to gather in the main branch pipe radius, and the branch pipe at the top of the wall thickness, pressure and axial force under the joint action of gradually decreases, and in this way, the result is the forming of tube wall thickness difference will be more and more big.
In actual production, therefore, as long as meet the production condition, die fillet radius should be as far as possible big, so as to give full play to the shaping of metal materials, which can obtain the forming better effect of tee pipe fittings.
Acknowledgements This work was supported by the High-end CNC Machine Tools and Basic Manufacturing Equipment Special Major Science and Technology Project (Grant No. 2011ZX04001-011) and Industry Project of Qiqihar City (Grant No.
Labergere: Journal of Materials Processing Technology, Vol.125-126 (2002), p. 565-572
[5] Li-Ping lei, Dae-Hwan kin and Sung-Jong Kang: Journal of Materials Processing Technology, Vol. 114 (2001), p. 201-206.

Synthesis and Performances Analysis of Imidazoline Quaternary Ammonium Salts Containing Thioureido Group Zhang guanghua1,a, Liu Guojun1,b and Wang tengfei1,c 1Key laboratory of Auxiliary Chemistry & Technology for Chemical Industry, Ministry of Education, Shaanxi University of Science & Technology, Xi'an 710021, Shaanxi, China azhanggh@sust.edu.cn, bliuguojun@sust.edu.cn, c0806042@sust.edu.cn Keywords: Imidazoline; Corrosion inhibitor; Thioureido; Quaternary ammonium salt; Partition coefficient; Mass transfer Abstract.
Three different kinds of imidazoline quaternary ammonium salts were synthesized with the use of valeric acid, decanoic acid, oleic acid, diethylenetriamine, benzyl chloride and thiourea as raw materials.
References [1] Lin Haichao:Corrsion Science And Protection Technology, Vol. 9 (1997)p. 308-313 [2] Wang Dihua; Gan Fuxing; Yao Luan: Materiais Protection, Vol. 33 (2000)p. 29-32 [3] Zhang Jun, Li Zhongpu, ZhaoWeimin .et al: Acta Petrolei Sinica(Petroleum Processing Section), Vol. 24 (2008)p. 598-604 [4] Liu Xia; Zheng Yugui: Journal of Chinese Society for Corrosion and Protection, Vol. 5 (2009)p. 333-338 [5] Jiao Qizheng, Fu Chaoyang, Wang Lirong, et al: Natural Gas Industry, Vol. 26 (2006)p. 131-133

It is thus imperative to find alternative materials.
Materials & techniques 2.1.
Materials Poly(lactic acid) is supplied by BIOMER (Biomer L 900).
Journal of Polymer Advanced Technology 2008; 20:21–27
Primer on composite materials: Analysis.

Characteristic of Micro-EDMed Surface Fig. 5 depicts the results of Micro-EDM inconel 718 with positive polarity for tungsten electrode materials.
Illustration of SEM micro-hole entrance and micro-hole exit Influences that affect the taper and materials used in drilling Inconel 718 with the Micro-EDM.
And the disintegration of the particles materials and experiments.
Sciences 12 (10): 971-977. (2012)
Janmanee : submitted to Engineering Journal. 2012 ; 39(1)

A Digital Control for Swinging Arc Narrow Gap MAG Welding System Jie Zhu a, WeiQiong Xiong b, WeiHua Zhang c, WenHang Li d and JiaYou Wang e, * Jiangsu Provincial Key Laboratory of Advanced Welding Technology School of Materials Science and Engineering, Jiangsu University of Science and Technology, 2 Mengxi Road, Zhenjiang City, Jiangsu 212003, P.
Mitsuaki: Journal of the Japan Welding Society Vol. 68 (3) (1999), p. 41-59 [4] V.
Malin: Welding Journal Vol. 62 (4) (1983), p. 22-30 [5] B.
Fu, et al: Journal of Jiangsu University of Science and Technology (Natural Science Edition) Vol. 26 (5) (2012), p. 448-451

Acknowledgements The authors wish to acknowledge financially supported by Natural Science Foundation of Fujian Province of China.
Wittmann: Journal of Southeast University (Natural Science Edition) Vol. 36 (2006), p. 238 [7] Z.
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Tanimura: Proceedings of the Japan Concrete Institute Vol. 32 (2010), P. 1423 [12] JSCE: Concrete technology series, No.71: Structural performance of concrete structure containing deteriorated materials (Japan Society of Civil Engineers, Japan 2006)

Acknowledgements This work is supported by the National Natural Science Foundation Project of China (11272185, 50678182) and China Postdoctoral Science Foundation Projects (200902288,20080430095).
Advanced Materials Research2012;340:126-129
Macroscopic characteristics of loose earth in cyclic soak at Three Gorges Reservoir area.Journal of Chongqing Jiaotong University (Natural Science)2010;29:445-449
Journal of Chongqing Normal University(Natural Science),2009;26:43-47
Journal of Mountain Research1997;15:183-186.

Nan 2 1 Department of Materials Science and Engineering, Wuhan University of Technology, Wuhan, 430070,China, email:daiying@mail.whut.edu.cn 2 Department of Materials Science and Engineering, Tsinghua University, Beijing 100084, China, email: cwnan@tsinghua.edu.cn Keywords: AlN, Nanocrystalline, Platelets, Nitridation Abstract.
Introduction Aluminum nitride (AlN) is considered as a perspective material with many promising properties, such as, thermal conductivity, excellent dielectric properties, good thermal compatibility of AlN with silicon, high-temperature machinability, high mechanical strength and nonreactivity of AlN [1].
Experimental The starting materials used in this study were commercial aluminum powders and carbon black.
Acknowledgement The work was supported by the National Natural Science Foundation of China (Grant No. 50172006).
Nan: Journal of Wuhan University of Technology, Vol. 12 (1997), p. 53