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Numerical Simulation of Casting Thermal Stress and Deformation Based on Finite Difference Method Tao Chen1, a, Dunming Liao1,b and Jianxin Zhou1,c 1 State Key Laboratory of Materials Processing and Die & Mould Technology, Huazhong University of Science and Technology, Wuhan 430074, P.
Stress concentration Fig. 2 Equivalent stress distribution Fig. 3 Casting deformation illustrated with implicit surface Fig. 4 Casting deformation in the experiment Fig. 5 Cracking in the experiment Acknowledgements This work was supported by the following foundations: (1) New Century Excellent Talents in University (NCET) 2010-2012 (2) National Science & Technology Key Projects of Numerical control (2012ZX04014-052) 2011-2013 (3) Fundamental Research Funds for the Central Universities (2011TS039) 2011-2012 (4) Foundation for Innovative Research Groups of the Natural Science Foundation of Hubei Province, China (2010CDA067) 2011-2013 (5) National Science & Technology Key Projects of Numerical control (2012ZX04012-011) 2012-2015 (6) National Science & Technology Key Projects of Numerical control (2012ZX04010-031) 2012-2015 (7) Natural Science Foundation of Hubei Province (2011CDB279) 2012-2013 References [1] B.G.
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Materials and methods Study area.
All containers in contact with the sample were previously washed with deionized water and the river sample in sequence to eliminate disturbance with other organic materials.
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Material support of its application .Material support of social networks , also known as instrumental support , it not only refers to money , supplies and other tangible material resources , but also includes the ability to provide problem-solving suggestions , comments , etc. can bring real help for the individual or individuals can reduce stress response tool sex.
Parents are important kinship is one of the pillars of college emotion, it is the main source of material life, so that students' social network strong ties.
The social network density, the strength of the selection emotional intimacy as the main basis for distinguishing between, come to the parents of students' social networks, lovers, roommates, former friends, classmates are strong relationships with professional, corporate colleagues, internships colleague a weak relationship, kinship, and other geo-science, friends, relations belongs relations.
Parents as a strong relationship hybrid networks primarily for students with emotional and material support, and lovers of these more specific network is a strong affective feelings and college students an important source of social support.
[4] Yue GuoLin, Zhang Yu, Mao Shuzhen: Social Science Journal, (2006) no. 2, p. 43-50 [5] Zhu Renhong: Scientific Studies, vol. 23 (2005) no. 5, p. 688-699.

So it is of great significance to detect the state of stress of ferromagnetic materials.
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Constitutive Relationship The material studied is the direct aged GH4169 alloy.
Technol, Vol. 27-12(2011), p.1178-1184 [2] WANG Zhong-tang , ZHANG Shi-hong, CHENG Ming, et al. : JOURNAL OF IRON AND STEEL RESEARCH, INTERNATIONAL,Vol.17-7(2010) , p.75-78 [3] Keum-Oh Lee, Soon-Bok Lee: Materials Science and Engineering A.
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Preparation of -Alumina from Coal Fly Ash by Sintering with Sulfuric Acid Wenning Mu 1,a , Yuchun Zhai 2,b 1 Department of Materials Science and Engineering，Northeastern University at QinHuangdao Branch, Qinhuangdao 066004, PR China 2 Department of Metallurgical Physical Chemistry, Northeastern University, Shenyang 110004, PR China a danae2007@yahoo.cn, bzhaiyc@smm.neu.edu.cn Keywords: Coal fly ash; α-alumina; Sintering; Sulfuric acid Abstract.
Of the fly ash generated, less than 50% is reported to be used for making cement, concrete, bricks, and is used in backfill materials, roadway construction, soil amelioration [2].
Experimental Materials The fly ash samples used in experimental investigation were obtained from the Shentou Power Plant of Shanxi in China.
Journal of Hebei Institute of Technology 27(3), 148-150 (2005)
Materials Science and Engineering A 367, 166-170 (2004)

Barbosa 1,e . 1 Dep. of Metallurgical and Materials Eng., UFMG Rua Espírito Santo, 35, 30160-030 Belo Horizonte, Brazil 2 Usiminas, Research and Development Center Av.
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The pretreatment processing have obvious influence to the anaerobic degradation, and among the three steps of anaerobic digestion: hydrolysis, acidogenic, methanogenic, generally accepted the rate-limiting step is the hydrolysis of lignocellulosic materials[3], thus the physical, chemical and biological pretreatment aiming at remove lignin and hemicellulose are often used.
Materials and Methods Feedstock and inoculum Rice straw was collected from a farm of Huazhong Agricultural University.
Hydrolysis of lignocellulosic materials for ethanol production: a review.
Journal of Hazardous Materials 2009;17(1):366-373
Journal of Agro-environment Science, 2007;26(5): 1973－1976.