Search results

Foundry technique designing of the large scale thin-section casting Binfeng He1,a 1Department of Mechanical & Electronic Engineering, Xi’an University of Arts and Science, Xi’an, 710065, China agreatman_he@yahoo.com.cn Keywords: Numerical Simulation; Thin-section casting; Counter-pressure casting Abstract: The FDM numerical simulation software View Cast system was employed to the counter-pressure casting of aluminum alloy large-scale thin-section casting.
The casting was cast from A356 alloy and the mold material was resin bonded sand.
Table 1 Material properties of A 356 Material properties Values Density 2.485×10-3(g/mm3,for solid) 2.415×10-3(g/mm3,for liquid) Viscosity 2.96×10-3(g/mm.s) Specific heat 0.0153 KJ/kg.K Thermal conductivity 0.6084 W/m.K Latent heat 389(J/g) Liquidus temp. 613℃ Solidus temp. 515℃ Table 2 Material properties of mold Material properties Values Density 1.44(g/mm3) Specific heat 1.076KJ/kg.K Thermal conductivity 0.804W/m.K The pressure boundary condition can only be used if the pressure at the gate is known.
[4] Hong Yan, Wenwei Zhuang ea tl: Journal of Materials Process Technology Vol. 187-188(2007), p. 349~353,in Chinese

Phase-field simulation of three-dimensional dendritic growth Changsheng ZHU 1, a, JunWei Wang 2,b 1CAD Center，Lanzhou University of Technology, Lanzhou 730050 2State Key Laboratory of Gansu Advanced Non-ferrous Metal Materials, Lanzhou University of Technology，Lanzhou 730050，China azhucs@lut.cn, bwtj3318@163.com Keywords: Phase-field model, Dendritic growth, Three-dimensional, Numerical simulation Abstract.
Dendrites are the primary component of solidification microstructures in metals, and they are the basic microstructural form for most crystalline materials.
Microstructure formation is at the center of materials science and engineering, and it is the strategic link between materials processing and behavior[2].
Several methods have been explored to solve directly the full time-dependent free boundary problem such as a time-dependent boundary integral formulation, variational algorithms and front tracking method[3]．Since the phase-field models(PFM) had been advanced, they have rapidly become very popular for the simulation of microstructures evolution during solidification process, and it is emerging as a method of choice for simulating interfacial pattern formation phenomena in crystal growth and other materials sciences．
Jian: JOURNAL OF SYNTHETIC CRYSTALS Vol.31， (2002) , p.245 [4] A.

UV Aging Performance of Asphalt Containing LDHs LIU Panfei1,a, ZHENG Jun 1,b, WU Shaopeng1,c 1 State Key laboratory of Silicate Materials for Architectures (Wuhan University of Technology) Wuhan 430070, China a whutpfliu@163.com, b zhengrongjungo@163.com, c wusp@whut.edu.cn.
A gradual degradation occurs, when asphalt materials are exposed to the heat, air and ultraviolet (UV) radiation [6].
Layered double hydroxides (LDHs) are a class of inorganic layered materials that consists of positively charged layers and the interlayer exchangeable anions.
Experimental Materials.
[10] Shaopeng Wu, Jun Han, Ling Pang, Man Yu, Teng Wang, Rheological properties for aged bitumen containing ultraviolate light resistant materials, Constr Build Mater. 33(2012) 133-138

Linear Target Feature Extraction Applied in Target Identification Man Zhao1,2,a, Jinjiang Cui 3,a, Henan Wu1,a, Guang Yang 1,a, Dayong Jiang 4,a,* 1Special Service Department, Aviation University of Air Force, Changchun 130022, China 2School of Science, Changchun University of Science and Technology, Changchun 130022, China 3Suzhou Institute of Biomedical Engineering and Technology Chinese Academy of Sciences, Suzhou 215000, China 4School of Materials Science and Engineering, Changchun University of Science and Technology, Changchun 130022, China axman82@126.com Corresponding author: Tel.:+86 431 85583016; fax: +86 431 85583015 E-mail address: xman82@126.com Keywords: Linear target extraction; Target recognition; Hough transform Abstract.
Acknowledgements This work is supported by the National Natural Science Foundation of China (Grant Nos. 61106050, 21201022), Jiangsu Provincial Natural Science Foundation of China (BK2012188).
References [1] Roushdy, M., “Comparative study of edge detection algorithms applying on the grayscale noisy image using morphological filter”, the International Journal on Graphics, Vision, and Image Processing, 6(4), 17-23 (2006) [2] Z.

Materials and methods Sewage sources.
Acknowledgements This work was supported by National Science Foundation of China (Research Project 51078067), Science and technology development project of Jilin province (No. 201101089), Jilin Science and Technology Department of Education funded research project (guitar UNESCO co-word [2009] No. 254) and science and technology development plan of Jilin province (20122112).
(China Environmental Science Press, Beijing 1999)
Wang, Environmental Protection Science Vol. 4-27(2001), P 14 [4] T.
Jiao, Journal of Jilin Architectural and Civil Engineer ing Institute Vol. 24-2 (2007), P 29

Homeland Security Center had researched the VHP decontamination effect of HD on internal buildings materials such as galvanized metals, decorative laminate, carpet and ceiling [5].The experimental results showed that the residual density on galvanized metal and decorative laminate surface has reached the security level with 525mg/m3 VHP decontamination for 400 min, but the HD residual density on the other two surface have not reach the security level.
(3) The external environment includes the properties of contaminated material, and the temperature and humidity in the space.
When the contaminated materials have smooth surface so that the agent spreads into film, the decontamination time is less than 2h.
Riggs, M.L.Taylor and J.Chang ,Decontamination assessment of Bacillus anthracis, Bacillus subtilis, and Geobacillus stearothermophilus spores on indoor surfaces using a hydrogen peroxide gas generator, Journal of Applied Microbiology (2005)p. 99, 739
Australian Defence Science and Technology Organisation, (2006)

The development of materials with specific properties is a relevant engineering topic.
The composite materials, hybrid of metal structures embedded in polymer matrices, are intensively used in mechanical systems in order to obtain materials with high resistance associated to low weight.
In order to produce this material, techniques were developed that allowed the union of the component materials.
Rethwisch, Materials Science and Engineering: An Introduction, octave ed., John Wiley & Sons, New Jersey, EUA, 2010
Morozov, Mechanics and analysis of composite materials, first ed., Elsevier Science, Oxford, UK, 2001

In this paper, the No.18 model from the software LS-DYNA is chosen as material model for the pipe.
The main characteristic parameters of the tubular material and the deformation die are shown in Table 1 and Table 2.
Table 5 Effect of material performance on the hydroforming process material type 18 36 material characters 7.8 7.83 206.0 207.0 0.3 0.28 468.3 684.0 0.206 0.22 maximum load force axial force 277.3 291.4 inner high pressure 32.6 35.5 simulation result minimum thickness 3.680 3.281 axial reduced short 20.878 18.464 The Technology of Compound Hydroforming for Rear Axle Housing of Light Trucks The Definition of Hydraulic Bulging Ratio.
Hartl: Tube Hydroforming—Research and Practical Application, Journal of Material Processing Technology, Vol.77 (1977), pp174~ 186
Modeling and simulation in Metal Engineering and Material Science, Beijing, China (1996), pp640~645

Porous materials on the basis of hydroxyapatite (HA) constitute an ideal bone substitute since they promote tissue regeneration by specific surface characteristics.
Materials and Methods The synthetic bone graft NanoBone® S (NBS, Artoss GmbH, Germany) and the xenogeneous Cerabone®-Granulat (CB, aap Implatate AG, Germany) were compared in this study.
Granulates of NanoBone® materials with a size of 0.6 x 2 mm were used.
Klein, K. de Groot, K.C.A. van Blitterswijk, The ultrastructure of the bone-hydroxyapatite interface in vitro, Journal of Biomedical Materials Research 26/10 (1992) 1365-1382
Urist, Bone: formation by autoinduction, Science 150 (1965) 893-899

Wistron Advanced Materials (WAM Kunshan) Co.
Mechanical recycling produces similar materials and high value products, and releases less toxic byproducts with easily controlling of contaminants emission for WEEE plastics disposal.
Hosoda, International aspects of recycling of electrical and electronic equipment: Material circulation in the East Asian region, Journal of Material Cycles and Waste Management, 2 (2007) 140-150
Muroishi, Emission inventory of deca-brominated diphenyl ether (DBDE) in Japan, Journal of Material Cycles and Waste Management, (2006) 56-62
Bahadir, Formation of PBDD/F from flame-retarded plastic materials under thermal stress, Environ.