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Introduction One of the complexities of the mechanical behavior of quasi-brittle materials lies in the diversity of damage and failure modes in various stress states.
A traditional volumetric-deviatoric split of the strain is featured in many kinds of constitutive models for quasi-brittle materials and has been playing an important role in microplane models since Bažant and Prat [[] Z.P.
Prat, “Microplane model for brittle-plastic material.
I: Theory“, Journal of Engineering Mechanics, ASCE, vol. 114, 1988 p.1672–1688. ].
Acknowledgements Financial supports from the National Natural Science Foundation of China (Grant Nos. 51108336, 51378377) are greatly appreciated.

Preface 2013 International Conference on Materials, Transportation and Environmental Engineering (CMTEE 2013) will be held on August 21-23, 2013, in Taiwan.
The conference aims mainly at promoting the development of Materials, Transportation and Environmental Engineering, strengthening the international academic cooperation and communications, and exchanging research ideas.
We believe the proceedings will provide the readers a broad overview of the latest advances in the field of Materials, Transportation and Environmental Engineering.
Thomas Wohlbier, Managing Editor of Journal of Advanced Materials Research, is greatly acknowledged.
Pa, National Taipei University of Education Shao-Wen Su, National Chin-Yi University of Technology Yi-Ying Chang, National Chin-Yi University of Technology Cheng-Yi Yu, National Chin-Yi University of Technology Jun-Hong Lin, Nanhua University Lei Wei, National Chin-Yi University of Technology Kuang-Cheng Yu, National Chin-Yi University of Technology Ting-Yu Chen, National Chin-Yi University of Technology Chih-Neng Hsu, National Chin-Yi University of Technology Co-Sponsored by National Chin-Yi University of Technology National Cheng Kung University National Sun Yan-Sen University National Chi Nan University, ChienKuo Technology University Control Engineering and Information Science Research Association International Frontiers of science and technology Research Association Trans Tech Publications

Questions of material science, 2(58) (2009) 38-45
Aerospace Materials.
Russel, Materials Reserch and Engineering.
Welding and joining of aerospace materials.
Fundamentals of Materials Science and Engineering.

Preparation of Carbon Fiber Reinforced SiC Matrix Composites By PIP Process Quanqing Zhang1 , Tao Zeng1,b , Su Cheng1 1 Department of Engineering Mechanics, Harbin University of Science and Technology, Harbin 150080 P.R.
Fabrication of SiCf/SiC composites by chemical vapor infiltration and vapor silicon infiltration, Materials Letters 2010; 64:1691–3
[2] S M Zhu, S Q Ding, H A Xi, R D Wang, Low-temperature fabrication of porous SiC ceramics by preceramic polymer reaction bonding, Materials Letters ,59 (2005) 595–597
[3] P Xiao, Study on the preparation of high-temperature ceramic matrix composites [J], Materials Engineering, 2000:41-44
Stuart, Comparison of Two Processes for Manufacturing Ceramic Matrix Composites from Organometallic Precursors[J], Journal of European Ceramic Society, 1999, 19:285-291

With the productivity of β-magnetic chitosan microspheres is above 50%, the magnetic Fe3O4/βCS/HA composite microspheres are expected to become promising multi-functional bone repair materials.
Ltd., Pujiang County, China. βCS made from the skin of maggot has higher viscosity, better activity and lower heavy metal concentration in comparison to that made from shrimp shell and crab shell, so it can be used for material for skeleton repair.
Magnetic composite material is prepared by in situ precipitation method whose matrix is HA and padding is Fe3O4/βCS.
References [1] Qisheng Gu, and Lixia Jiang: Chitosan-based Biomaterials in Clinical Medicine (Second Military Medical University Press,China 2004) [2] Aiqing Wang and Xianda Yu: Chinese Journal of Marine Drugs.
Journal of Colloid and Interface Science.

Fig.4 The NC precise micro-hole vibration drilling system The experimental conditions are shown as follows: spindle speed, 15000rpm; feed rate, 2μm /r; vibration frequency, 750Hz; vibration amplitude, 2μm; drill bit, Carbide, Φ0.5mm; Workpiece material, 45 steel; lubrication and cooling, 10 mobile oil.
Acknowledgements This work was financially supported by Shandong provincial natural science foundation (ZR2010EL028), science research funds(Z201025) and Dr.
Journal of Materials Processing Technology, 2003, 140 [5] T.
Journal of Materials Processing Technology, 2003,143-144

Acknowledgements All the research works are supported by the Natural Science Foundation of Ningbo of China under granted No. 2010A610129.
Salimi: Advanced Materials Research, Vol.154-155(2011), pp. 1705-1712 [2] P.
Qiu: Journal of Mechanical Engineering, Vol. 46(2010) No.1, pp. 169-174 [6] H.Z.
Fan: Journal of Xi’an Jiao Tong University, Vol . 40(2006) No.7, pp.863-865 (In Chinese) [7] P.
Zeng: Applied Mechanics and Materials, Vol.37-38(2010), pp.870-874

Introduction In recent years, many efforts have been focused on the organic/inorganic composite materials with various compositions.
Among many inorganic chemicals, titanium dioxide, TiO2, is one of the most useful inert materials, and it is non-toxic, and inexpensive in the nanocomposite synthesis.
Experimental Materials PA66 (101L) used in this work was purchased from Dupont Ltd., USA.
It should be noted that the friction coefficient of the materials was reduced with load in the test.
Shanghai Municipal Natural Science Foundation：11ZR1413600.

Now we mainly improve by adding appropriate electric conduction. due to special structure, good electrical conductivity and chemical stability in strong alkali electrolyte and not with electrolyte or other active material of nickel positive produces chemical reaction, CNTs are considered to be ideal additives for α-nickel hydroxide electrode active materials[4].
Compared with d value (0.779) for standard α-Ni(OH)2·0.75H2O of the peak(003),it is observed that the d value of 15%Al3+ doped α-nickel hydroxide is larger than other materials, equals 0.814nm,this implies that the 15%Al doped α-nickel hydroxide material has better protons migrating ability[6]. so the next test studies on the 15%Al doped α-nickel hydroxide material in this work.
Acknowledgment We gratefully acknowledge the financial supports of National Natural Science Foundation of China(20563001) and Guangxi Science Research and Technology Developing Foundation (073101,0842003-12) References [1] Y.H.
Liu: Chinese Journal of Power Sources Vol. 2(2000), p.77
Yang: Chinese Journal of Power Sources Vol. 26(2002), p. 348

Wu2 School of materials science and technology, Nanjing University of Aeronautics and Astronautics, Nanjing, china, 210016 1.Wg641022@126.com, 2.baolinwu02@yahoo.com.cn Key words: AZ31 magnesium alloy; Equal channel angular pressing(ECAP); Microstructures; Texture; Dynamic anisotropy Abstract: the microstuctures and orientations changing of hot extrusion AZ31 magnesium alloy were obtained by equal channel angular pressing (ECAP).
Especially, the high strain rate response of these materials is of great importance to the automotive, aerospace and defense industries.
Koike, Metallurgical and Materials Transaction A, 36A (2005), p. 1689 [3] Koike J, Kobayashi T, Watanabe H.
Liu, Materials Science and Engineering A, 483-484(2008), p. 576 [7] Matthew T Tucker, Mark F.
Abouridouane, International Journal of Impact Engineering, 32 (2006), p. 741 [9] Wei Qian Song, Peter Beggs, Mark Easton, Materials and Design, 30 (2009), p. 642 [10] Su-Tang Chiou, Hsien-Lung Tsai, Woei-Shyan Lee, Journal of Materials Processing Technology, 209 (2009), p. 2282