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When defining plastic material in ABAQUS, plastic strain is needed, its expression is （4） A series of data points composed of true stress() and plastic strain(εpl) are given in ABAQUS /CAE or INP file is the way in which plastic material is defined, Then ABAQUS carry out linear interpolation between the data.
When the forming process finished, the deformed mesh and material state of the workpiece which will be used to analyze Springback are imported into Abaqus / Standard.
Acknowledgements This work was financially supported by the National Natural Science Foundation of China (51075121).Thanks for Xiaozhong Deng as the corresponding author of the paper.
References [1]Yugong Dang,Xiaozhong Deng,Shaowu Nie,et al.New Schemeof Cold Rotary Forging for Hypoid Gear and Its Feasibility[J].Journal of Bejing University of Technology, 2013.39(9): 1290-1296
[6]Jinyuan Tang,Taiping Pu.Spiral Bevel Gear Meshing Stiffness Calculations Based on the Finite Element Method[J] .Journal of Mechanical Engineering ,2011.6(11):23-29

Wang2,b 1Electronic and information engineering，Nanjing Communications Institute of Technology，Nanjing 211188, China 2College of Science, HoHai University, Nanjing 210098, China akaijuzhang@126.com,b1072615510@qq.com Keywords: mismatch strain; MgxZn1-xO alloys; metastable; miscibility gap Abstract In this paper, a theoretical calculation of the miscibility gap taking modified interaction parameter and mismatch strain into account are performed for the MgxZn1-xO ternary compound system using the modified strictly regular solution model.
Introduction Zinc oxide(ZnO) and related semiconductor crystals are new and very attractive materials for their application in ultraviolet light-emitting device, deep ultraviolet sensors, transparent thin-film transitors, multifunctional integrated circuits, and so on.
So it is very important to clarify the unstable and stable-mixing regions of this material system.
El Haj Hassan, Computational Materials Science 40 (2007) 66–72 [9] Karpov S.
SPALDIN1, Journal of ELECTRONIC MATERIALS, Vol. 35, No. 4, 2006 [11] A.

Lee 2,d 1, Depart. of Electronic Materials Sunmoon University, 100 Kalsan-Ri Tangjeoung-Myun Asan Chungnam, 336-840 Korea 2 KAERI, Dukjin-Dong 150, Yusung-Gu, Daejeon, 305-353 Korea ayochoih@hanmail.net, byochoi@sunmoon.ac.kr,cbgkim1@kaeri.re.kr, dywlee@kaeri.re.kr Keywords: Coated Fuel, Silicon Carbide, Graphite, Nano-indentation.
Although various techniques were developed to analyze the coated layers such as chemical methods, one of the problems in production scale, it is necessary to find a conventional method to evaluate thin coated layers such as various mechanical properties and density.[2] Recently, kinetic indentation technique is proposed to evaluate mechanical properties of nanostructure materials.[3] The method is theoretically based on both the proportion of elastic and plastic deformation and the values obtained by micro-hardness test.
Hence, the objectives of this study are to apply the nano-indentation technique to evaluate mechanical properties of irradiated materials and establish the method for the development of nuclear materials.
Acknowledgements This study was supported by Korea Science and Engineering Foundation (KOSEF) and Ministry of Science and Technology (MOST), Korean government, though National Research Laboratory (NRL) Program.
Alekhin, Journal of Tambov State University, Vol. 3(3) (1998) p. 1

Lashkaryov Institute of Semiconductor Physics of the National Academy of Sciences of Ukraine, Prospekt Nauky 41, Kyiv 03028, Ukraine aczelenska@gmail.com, btsasaki@rie.shizuoka.ac.jp, cgnatyuk@ua.fm * corresponding author Keywords: terahertz spectroscopy, salicylic acid, fingerprint spectrum, Fourier transform infrared spectroscopy, solid-state density functional theory.
Introduction THz research is a powerful and promising branch for the application in characterization of materials [1] (for example, organic matter [2] and ion solutions [3], semiconductors [4, 5] and pharmaceutical drugs [6]), medical imaging [7], non-destructive testing and security.
Characteristic absorption lines in THz spectra of materials are considered as fingerprint spectra for exact matter and applied to distinguish compounds of various objects.
Populating the database with spectra of different substances is useful for identifying materials for various monitoring application.
Korter, Understanding the terahertz spectra of crystalline pharmaceuticals: terahertz spectroscopy and solid-state density functional theory study of (S)-(+)-Ibuprofen and (RS)-Ibuprofen, Journal of Pharmaceutical Sciences 100 (2011) 1116–1129

Research on Impact Fracture and Microstructure of 40Cr Steel under Different Tempering Conditions Yiqiang Xiao1, Shengxu Liu1, Minglong Kang1, Jianmin Zeng1, a Guoan Wang2, Qiuhong Meng2, Yingzhang Deng2 1Key Laboratory of New Processing Technology for Nonferrous Metal materials, Ministry of Education, Guangxi University, Nanning 530004, P.R.China 2Guangxi LiuGong Machinery Co., Ltd, Liuzhou, 545007, China azjmg@gxu.edu.cn Keywords: 40Cr, impact fracture, microstructure, tempering cooling medium Abstract.
Experimental methods Material.
Hot rolled 40Cr steel was used for test material.
Acknowledgements The authors sincerely thank the financial supports from Guangxi Science and technology project (1348010-1) and Natural Science Foundation of Guangxi (2011GXNSFF018001).
References [1] Zhengming Zeng: Iron and Steel Materials Manual (Beijing 2009) [2] Gao Weiguo, Dong Lijun, Hu Fenglan, Qin Bo: Journal of Hunan institute of engineering Vol. 18 (2008), p. 33 [3] Wang Ruiquan, Han Qiuhua, Liu Yanyan: Heat treatment technology and equipment, Vol. 31(2010), p. 29 [4] Zhang Hongying, Zhang Hongbing, Hu Jingxia: Hot working technology, Vol. 35(2006), p. 23 [5] Xiao Yiqiang, Liu Shengxu and Kang minlong: Advanced Materials Research Vol. 881-883 (2014), p. 1271

Using the method of fuzzy comprehensive and grading evaluate the each town of agricultural modernization of xinchangxian county zhejiang provionce. (4) Liaoning normal university，ZhangChunHua etc evaluate the agricultural modernization process in dalian, the choice of agricultural production conditions, agricultural science and technology level, ecological environment level, the peasant's living standard, the social development level and so on ,6 individual indexes, using analytic hierarchy process to determine the weights of each index, objectively measured and calculated the dalian agricultural modernization level. (5) Chinese Academy of Sciences for Northeast geography and agricultural ecologic institute,WangJianGuo etc.
According to the basic connotation of agricultural modernization from four aspects of economic output modernization,science and technology and material equipment modernization, management modernization and sustainable agricultural development,the final choose is 19 evaluation index which is easily operated, and the anticipated target of agricultural modernization in daqing is given, making a scientific evaluation to the agricultural mordernization in DaQing combining the actual situation[2,3].
As parts of different standards, so the rest of the time in assessing response to standard values to make changes, which can effectively right across the country to evaluate the modernization of agriculture.References References [1].Fakhruddin, Abu Sufiyan:Level of Rural Mordernization-A Geographical Study of Central of Canga-Ghaghara Doab(Asian Profile,1996) [2]X.Zhnag: submitted to Journal of Agricultural Economies(2004)
[3]YI Yuanrong,HAIMiti·yimiti: submitted to Journal of Research of Soll and Water Conservation(2007)
[4]XU Wei-guo, ZHANG Qing-yu,GUO Hui: submitted to Journal of Biomathematics(2007).

Dynamic Simulation and Experimental Research of High Pressure Pneumatic Valve in Gas-driven Light Gas Gun Yang Liu 1, a, Xiaodong Song 2,b , Xiaoxian Yao 3,c , Kun Li 4,d 1 School of Aerospace Science, Beijing Institute of Technology, Beijing 100081, China 2 School of Aerospace Science, Beijing Institute of Technology, Beijing 100081, China 3 School of Aerospace Science, Beijing Institute of Technology, Beijing 100081, China 4 Beijing Electro-Mechanical Engineering Institute, Aerodynamic Technology Academy of China Aerospace Science and Industry Corporation, Beijing 100074, China ahistbit@bit.edu.cn, b xd_song@bit.edu.cn, cyxx11@bit.edu.cn, dlikun102626@gmail.com Keywords: Hypervelocity Launching, gas-driven light gas gun, high pressure pneumatic valve, dynamic simulation, experimental research, delay time Abstract: Use gas-driven light gas gun is one of the techniques extensively used to achieve hypervelocity projectiles.
The mass reduction of the moving parts and the using of material with energetic high efficiency have resulted with a negligible internal friction during opening and closing the high pressure pneumatic valve.
Koura : Preliminary study of counter impact with two-stage light gas gun using electrothermal–chemical gun technology, International Journal of Impact Engineering 33(2006) 11-23
Henner : Ram-accelerator A new hypervelocity launcher for ballistic studies, International Journal of Impact Engineering 23(1999) 533-545
Grid adaptation studies for reactive flow modeling of propulsion systems, 37th AIAA Aerospace Sciences Meeting and Exhibit, January 11- 14 , 1999, Reno - Nevadan.

Transform the technologies into productivity and improve the content of science and technology in non-point source pollution control.
[3] Zhonghan Liu, Xiaohai Liu, Bin He, Jufen Nie, Jiangyan Peng, and Lei Zhao: Water and Environment Journal, Vol. 23 (2008), p. 235
Altinakar: Journal of Environmental Management, Vol. 92 (2011), p. 149
[5] WU Yong-hong, HU Zheng-yi, YANG Lin-zhang: Ecological Science, Vol. 27 (2008), p. 346
Doyle: Journal of the American Water Resources Association, Vol. 42 (2006), p. 25.

Applied Surface Science, 143 (1999) 223 [3] T.B.
Joyce, Journal of Crystal Growth, 105 (1990) 299 [4] J.
Armstrong, Journal of Vacuum Science and Technology B, 13 (1995) 88 [5] J.
Goodhew, Journal of Crystal Growth, 120 (1992) 84 [6] T.A.
Applied Surface Science, 156 (2000) 21 [7] D.V.

Introduction Cultivated land is the basic material for human survival and development [1].
Zhour: Resources Science Vol. 27 (2005), p. 79 [2] X.
Li: Journal of Natural Resources Vol. 14(1999), p. 329 [3] X.
Song: Chinese Journal of Ecology Vol. 28(2004), p. 1743 [5] M.
Li: Journal of Anhui Agricultural Sciences Vol. 37(2009), p. 16948 [6] D.