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Introduction Composite materials found their inspiration in the nature where combination of rigid reinforcement and soft matrix is used to reach the desired balance of properties.
Materials and Methods Polyurethane casting resin GAFORM R30 based on polyol – component A and MDI (methylene diphenyl diisocyanatane) based pre-polymer hardener – component B was purchased from Dawex Chemical (Czech Republic).
Ritchie, Bioinspired structural materials, Nature Materials.14 (2014) 23-36
Biological materials: A materials science approach, Journal of the Mechanical Behavior of Biomedical Materials. 4 (2011) 626-657
Fratzl, Skeleton of Euplectella sp: Structural Hierarchy from the Nanoscale to the Macroscale, Science. 309 (2005) 275-278

Suppose composite materials with cracks, loaded, the crack is limited by the fiber eutectic in the crack surface, thereby the crack tip stress intensity factor may be reduced.
In far-field region, due to the axial deformations of the fiber eutectic, particles and composite materials are same, so (1) were, E11 and E are respectively the longitudinal elastic modulus of the fiber eutectic and the elastic modulus of composite materials, given in the literature [5].
Ep is the elastic modulus of particles. sf and sp are the stress which are respectively undertaken by the fiber eutectic and particles. s is the stress borne by composite materials.
Berger: Key Engineering Materials.
Echigoya: Journal of the European Ceramic Society.

The above process will be repeated until the material is destroyed, and the material damage process can be showed by the elements damage in turn.
Acknowledgments This work is supported by the National Natural Science Foundation of China under grant no. 10872216 References [1] Carmen Baudin, Ali Sayir, M.H.
Key Engineering Materials, 290(2005)199-202
Ceramic Engineering & Science Proceedings, 2(2005) 225-233
Chinese Journal of Solid Mechanics, 2(2009)116-121.

The design procedure is as follows, a appropriate size piezoelectric film, then appropriate circular electrode slice, which its transverse edge part is insulated from the nut, then isolation backings materials (here porous rubber as sound-absorbing material) are in turn placed into circular nut, then the bolt with fairlead is tightened into the nut.
Nano - AlP/ SiO2 sample is provided by Institute of Material, XI’AN JIAOTONG UNIVERSITY, with thickness 1.382mm.
It is worth noting that the laser intensity may not be too powerful to damage film material.
Preliminary investigation on laser ultrasonic NE of nano meter materials[J].
Journal of Shaanxi Normal University (Natural Science Edition), 2011, 29(3): 48-49 (In Chinese)

Materials and methods The experimental part was divide in two stages.
References [1] Ping Chen, Lian Bao Kan, Chao Jia: Applied Mechanics and Materials Vol. 361 (2013), p. 666
[2] Qin Huan Yang, Chang Qing Zhao: Advanced Materials Research Vol. 602 (2012), p. 1265
[3] Pei Yao Xu, Xiao Xue Han, Sa Sa Ban: Advanced Materials Research Vol. 383 (2011), 6391
[6] Nageswara Rao Neti: Materials Science Forum Vol.712 (2012), p. 191

The materials of rivet and plate are 2A12-T4 and 2024-T3, their specified properties are as shown in Table 1, while the hammer is regarded as rigid body.
Acknowledgments This research is supported by the National Science and Technology Support Program (2011BAF13B03).
Journal of Materials Processing Technology 2006; 180(1-3): 201-209
Materials Processing Technology, 2004, 153-154: 74-79
Mechanical Science and Technology for Aerospace Engineering, 2009(4): p.514-516, In Chinese

NoⅠraw material dapparent is between 0.8~1.1(changing with raw material’s quality and precursor particle size).Improving baking temperature and time will crystalize and aggregate the raw materials in stove, so dapparent will change.
Acknowledgements The national natural science foundation of china(30972399) ; "Eleventh Five-Year" plan supported by key project of National Science and Technology (2009BADB1B0304-5); Scientific research financial project aided by education department of Hunan Province (09C1017).
References [1] Lionel Vayssieves, Anders Hagfelde, Sten Eric Lirdduist .Purpose-built metal oxide nanomaterials: The emergence of a new generation of smart materials[J].Pure Appl.
[6] ZHOU Jian, X IAO Xue-qin, XU Wu-bin.Study of lithium ion positive pole material LiNiO2 [J].
Journal of Guang Xi university of technology,2005,Vol. 16, No.4:44-46,56

Damping Behavior of the High Strength Aluminum Alloy Prepared by Rapid Solidification and Powder Metallurgy Process Haitao Zhao 1, a , Junchen Yao 1, b, Yue Ma 1, c , Huibin Xu 1, d 1 School of Materials Science and Engineering, Beihang University, Beijing, 100083, China a geniemazhtao@sina100.com.cn, cmayue@buaa.edu.cn Keywords: metal matrix composite; damping capacity; rapid solidification and powder metallurgy process.
Introduction The application of high damping materials is of practical engineering importance in attenuating the amplitude of vibration at resonance conditions and reducing the probability of fatigue failure.
Compared to traditional processing technologies, MMC provided a unique approach to design and prepare materials with excellent combination of mechanical property and other useful properties.
Dai: Material Science & Technology Vol.7 sup (1999), P. 91-95 [2] P.Y.LI, S.L.
Dai: Journal of Aeronautical Materials Vol.20, No.3 (2000), P.164-171 [3] J.

Zeolites are solid crystalline microporous materials with large surface area and strong acid sites.
Since zeolites only have few surface silanol groups, it is quite difficult to introduce functional groups into the materials.
They found that it was possible to synthesise wellordered MCM-41 materials bearing alkyl sulfonic groups and tune the pore size by changing the alkyl chain length [5].
Materials and methods Raw Materials Glucose and LA used for calibration with the purity of over 99% were obtained from Aladdin Reagent (Shanghai, China).
Journal of Natural Gas Chemistry, Vol 21(2012), pp.138-147 [5] Reddy B M, Patil M K.

Velocity Temperature Characteristics of Time Domain Reflectometry Cable Length Measurement System Jianhui Song1,a, Liang Chen1,b 1 School of Information Science and Engineering, Shenyang Ligong University, Shenyang, 110159, P.
The factors conclude electrical conductor material, insulation materials, electrical conductor diameter, insulation diameter, ambient temperature, signal frequency and the cable crimp levels[1].
Considering the expression of the cable capacitance per unit length, it can be seen that the cable capacitance per unit length is proportional to the dielectric constant and insulating materials.
Therefore, the velocity should be specific analyzed according to different insulating materials and different ambient temperature.
Journal of Plant Nutrition and Soil Science Vol. 172 (2009), p. 186 [3] C.Y.O.