Search results

Present study is focussed on the materials and structural aspects of flapping wings.
Wing Development For making successful MAV, the wings have to be designed properly and appropriate materials have to be used for fabrication.
Tjong: Materials Science and Engineering: A, 485(1):508-516, 2008
Claes: Composites Science and Technology, 69(11):1756-1763, 2009
[13] Dimitrios Bikiaris: Materials, 3(4):2884-2946, 2010

Materials and method Material Mosaic sludge waste was collected at the Malaysia Mosaic Berhad (MMB) at Kluang Johor.
Applied Clay Science. 2005. 30(1):42-52
International Journal of Engineering and Applied Science.
[5] Chih-Huang Weng, Deng-Fong Lin, Pen-Chi Chiang, Utilization of Sludge as Brick Materials.
Advanced Materials Research, 2012.vol, 535-537, pp. 1723-1730.

In their studies, the perfect interface between two different materials is assumed.
For perfect interface the state vector keeps unchanged across interface of two materials.
Zhang, et al, Locally resonant sonic materials, Science 289 (2000) 1734-1736
Scott, Dispersive elastodynamics of 1D banded materials and structures, Journal of Sound and Vibration 307 (2007) 865-893
Wei, Band gaps of elastic waves in 1-D phononic crystals with imperfect interfaces, International Journal of Minerals, Metallurgy and Materials 16 (2009) 608-614

Stresses around V-notch are obviously smaller than those around D-notch, and we suppose that it is because materials around V-notch which introduces intense stress concentration firstly yield under intensely increasing thermal stresses.
Acknowledgements This work was financially supported by Guangxi Natural Science Foundation Program (2012GXNSFBA053150).
References [1] HU Shao-qiu, ZHANG Hui, YANG Li-bin, et al.. : Natural Science Journal of Xiangtan University Vol. 6 (2004), p. 66(in Chinese) [2] Michael B.
Edwards: International Journal of Pressure Vessels and Piping, 86(2009):126-131.
Vol. 86(2009), p. 126 [5] LIAO Kai1, WU Yun-xin, GONG Hai: Transactions of Materials andHeat Treatment Vol. 30(2009), p. 197(in Chinese) [6] KE Ying-lin, DONG Hui-yu: The Chinese Journal of Nonferrous Metal Vol. 14(2004), p. 639(in Chinese)

For other materials, there are a lot of flow stress models, such as Ludwik Model[4], Voce model[5], Ramberg and Osgood model[6], Ekelund model[7], Inoue model[8],Misaka model[9], Shida model[10], Zhou model[11], Sellars model[12], HERNANDEZ model[13] etc. have been established.
Yu: Journal of iron and steel research, international Vol. 16(6) (2009) p. 86-89 [2] J.
Wang: Journal of iron and steel research, international Vol. 17(11) (2010) p. 54-61 [3] E.J.
Salinas-Rodriguez: Journal of Magnetism and Magnetic Materials Vol. 323 (2011) p. 2524–2530 [4] P.
Voce: Journal of The Institute of Metals Vol. 74 (1948) p.537 [6] W.

In fact, coal tar provides not only rich alternatives of oil, but also precious raw materials for plastics, synthetic rubber, agriculture medicine, and high-temperature endurable insulating material and defense materials.
They are the most raw materials of various fields, including metallurgy, construction, spinning, paper making, and traffic.
Phenol mixture preparation usually uses chemistry method and solvent extraction. 3 Conclusions Coal tar is the important oil substitute, and chemistry raw materials as well as industry fuel.
Journal of fuel chemistry and technology.
Journal of fuel chemistry and technology.

However, POAA can be influence by temperature and pH of solution, and the presence of organic materials[11-12].
Journal of Food Science,68(9),pp. 2747-2751(2003)
African Journal of Food Science, 4(13), pp. 778 – 789(2010)
International Journal of Food Science and Technology, 40(5), pp. 495-500(2005)
Journal of Biomedical Materials Research, 52(4), pp. 662-668(1999)

Synergistic Effects of Al and Cr Addition on Microstructure of Mg2Ni Hydrogen Storage Alloy Zhaoming XIE 1, a, Fusheng PAN 2, b , Yafang XIANG 1, c, Yuan CHEN 2, d 1 College of Chemistry and Chemical Engineering, Chongqing University, Chongqing, China 2 College of Materials Science and Engineering, Chongqing University, Chongqing, China a xiezm@cqu.edu.cn, bfspan@cqu.edu.cn, cxiangyafang2006@163.com, dchenyuan@cqu.edu.cn Key words: Mg-based Hydrogen Storage Alloy, Element Substitute, Synergistic Effect Abstracts.
Acknowledgements The financial support of Chongqing Natural Science Foundation(No. 2006BB6183), Natural Science Young Scholars Foundation of Chongqing University is acknowledged.
Walker:International Journal of Hydrogen Energy Vol.32(2006) ,p.177 [2] Yi Wang, Xiaohang Qiu, Panwen Shen: The new progress in Mg-based hydrogen storage materials Vol.67(2004),p.327 [3] Wenbin Fang, Wencong Zhang, Erde, Wang: The Chinese Journal of Nonferrous Metals Vol.12(2002),p.853 [4] P.Wang,H.F.Zhang,B.Z.Ding,Z.Q.Hu:Journal of Alloys and Compounds Vol.313(2000), p.209 [5] H.Reule, M.Hirscher.
A.Weihardt, H.Kronmuller:Journal of Alloys and Compounds Vol.305(2000),p.246 [6] Erde Wang, Zhenglong Lei: The progress in Mg-based hydrogen storage materials Vol.21 ( 2003),p.42 [7] Huatang Yuan, Qiudi Li, Yiqing Wang: Chemical Journal of Chinese Universities,Vol.23(2002), p.517 [8] Zhaoming Xie, Anqing Fu, et al: Journal of Functional Material Vol.36(2006),p.601

FRP-confined concrete structure Fiber reinforced plastics (FRP) is a new material which composed of fiber and matrix material with high performance such as high tensile strength, good corrosion resistance, light weight, good applicability and so on.
The materials of CFRP sheets and steel tube wrapped outside of FSCC have low Poisson’s ratio, high ring stiffness and high strength.
The material of FSCC outer tube, which composited of FRP and steel, can improve the ductility of FRP material in FCC.
Han: Concrete-filled steel tube structure-theory and practice (the second edition) (Science Press, Beijing 2007)
Liu: Performance and design of steel tube confined concrete columns (Science Press, Beijing 2010)

The Mechanism Investigation on Propagation and Coalescence Pattern of Three Internal Plane Flaws in Brittle Materials Yanshuang Guo1 , Weishen Zhu1, a , R.H.C Wong 2 ,Shucai Li1 and Chunjin Lin1 1 Geotechnical & Structural Engineering Research Centre, Shandong University, China 2Department of Civil and Structural Engineering, The Hong Kong Polytechnic University, Hong Kong a Zhuw@sdu.edu.cn Keywords: pre-existing flaw; coalescence; wrapping crack; fracture mechanism Abstracts: Under the action of compressive load, the growth and coalescence containing flaws in brittle materials (rock and rocklike materials e.g.) will result in the local buckling and global fracture of rockmass.
It is a typical mechanism of fracture in brittle rocks and heterogeneous brittle materials under uniaxial compression consists in propagation of pre-existing flaws and interaction of wing cracks.
In 2-D case, the wing cracks propagation from the inclined flaws are studied with different materials by many researchers, such as Horii, Nemat-Nasser, Peng, et al [2].
So the resin after freezing can be taken as rock-like material.
Yin Experimental Study of 3-D Surface Flaw in Brittle Materials, Chinese Journal of Geophysics, Vol. 30 (1987), P.371- 378