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According to the Bragg condition, it can be concluded that: 　　　　 (2) According to elasticity mechanics, the changes of FBG center wavelength, ΔλB can be expressed as: (3) where εa, μ, αs, ξs, and ΔT are axial strain, Poisson's ratio of fiber material, coefficient of thermal expansion of fiber material, thermo-optic parameters of fiber material, and temperature change of FBG, respectively; p11 and p12 are photoelastic coefficients of the fiber material.
Fig. 5 Strain curves of reinforced concrete beam Acknowledgements This work was supported in part by NSFC under Grant No. 60876088 and Grant No. 51105398, the Supporting Program for Excellent Talents of University in Chongqing, and Research Foundation of Chongqing University of Science & Technology (Grant No.
[3] Yue Lina , Huang Jun, Jiang Desheng, Application of Optical Fiber Sensing Technology in Strengthening Monitoring of Wuhan Second Yangtze River Bridge, JOURNAL OF WUHAN UNIVERSITY OF TECHNOLOGY, 31(2009) 10–12
[4] Li Dongsheng, Deng Nianchun, Ou Jinping, Fiber Bragg Grating Sensor Monitoring Techniques and Health Diagnosis of Arch Bridge Suspenders, Journal of Optoelectronics · Laser, 18 (2007) 81–84
[10] Qiren Z. , Dongmei G. , Jing W. , A High Precise Sensing Demodulation Technology Based on Fiber-Grating Sensors and Single-Chip Microcomputer, Journal of Huaqiao University (Natural Science), 25 (2004) 254-257

Materials and methods Materials and chemicals Litchi (Litchi chinensis Sonn. cv.
McMillin: Meat Science Vol. 80 (2008), p. 43-65
Jiang: Journal of the Science of Food and Agriculture Vol. 80 (2000), p. 305-310
Ji: Chinese Journal of Tropical Crops Vol. 18 (1997), p. 53-58
Jiang: Journal of Food Engineering Vol. 64 (2004), p. 355-358

Experiments Raw Materials.
The sludge carbonization will produce plenty of C, providing plenty of materials into gas for the expansion of the ceramic particles.
Conclusions With sludge and fly ash in Huainan as the main raw materials, clay as bond, lightweight ceramic with good performance can be fired out.
Function Materials, 2010,41 (6):1097-1105.
Jinan University Journal (Natural Science Edition) 2003,3 (17).

The cam and tappet made of hard and brittle materials, like white cast iron treated by quenching, would have fatigue damage on the area of maximum tensile stress (on the surface).
Journal of Vibration Engineering.
International Journal of Solids and Structures.
Hebei Journal of Industrial Science and Technology.Vol.30(2013),p.48-52 [7] J.P.
Journal of Machine Design.Vol.25(2008),p.34-36 [11] M.

Use cement to mix concrete, apart from the mineral composition of cementitious materials, but also depends on the concrete water-cement ratio.
ACI Materials Journal, 1991:62-69 [3] YuHongfa, MuRu, SunWei, etc.
Journal of Portland, 2005,33 (4): 492 -499 [4] Wang Aiqin, Cao Jianguo, Li Jinyu, etc.
Cement-based composite materials science and technology [C].
Beijing: China's Building Materials Industry Press, 1999. 179-183

The Simple milling depth is 0.4mm which shows the optimized parameters can remove the Al2O3 ceramic materials.
International Journal of Machine Tools and Manufacture, 2007,47(3~4):618~612 [2] G.F.Yuan.
Laser Milling mechanism and dynamics process of hard and brittle materials[D].
[4] Y.Zhou, T.Q.Lei, ceramic material science[M].
Beijing: Science Press,2004:319~335 [5] J.C.Li.

Wood science and technology field of the important basic research direction is the study of the intensity of these systems, the directly related to produce the plank of performance.
This research attempts to the environmental scanning electron microscopy (sem) analysis method, this paper studies the heating condition not straw raw materials and adhesives cementing the interface of the surface morphology and adhesive result of differences, and further research and analysis of the results will be the impact of the composite. 1.Materials and methods 1.1Material science Experiment with fresh straw from jilin suburbs, remove leaves and scabbard, processed into 2 mm by 15 mm of samples, the moisture content 9.5% after drying.
Straw materials in the design of indoor supplies applications [D].
Forestry science and technology development,2001,15(5):25~27
Fujian agricultural university journal,1997,26(2):223~227.

Normally the discrete finite element (FE) model is not ideal because of implying more idealistic assumptions and simplifications such as the properties of materials, size deviation, and constraint condition of supporting, etc., and it can not accurately reflect the actual structural dynamic characteristics.
Journal of Sound and Vibration. 1-2(2007), pp. 126-145
(Urban Science Edition). 1(2009), pp.1-11.
(Urban Science Edition). 4(2008), pp.142-146.
Engineering Science. 5(2004), pp.87-93.

Tensile Strength of Surface Treated PBO Fiber Gang Shia, Su Jub, Chunfang Huangc, Dazhi Jiangd* Jianwei Zhange Department of Materials Science and Engineering, National University of Defense Technology, Changsha, Hunan 410073, China ashigang502 @qq.com, bsuju-nudt@nudt.edu.cn, chcf8819sk@126.com, djiangdz@nudt.edu.cn, ejwzhang.nudt@gmail.com Keywords: PBO fiber, Surface treatment, Combined treatment, Tensile strength, Weibull distribution.
Poly p-phenylene benzobisoxazole (PBO) fiber is a kind of organic fiber with high performance, but the properties of the interface between PBO fiber and resin are poor, which limit its application in the field of composite materials.
Materials and methods Raw material.
The irradiation field was provided by Academy of Agricultural Sciences in Hunan Province.
Liu: Journal of Xi'an Jiaotong University.Vol.36 (2002), p.975

Modelling of Strain-Path Transients in Commercially Pure Aluminium Jisheng Qin1, a *, Bjørn Holmedal1,b and Oddsture Hopperstad2,c 1Department of Materials Science and Engineering, Norwegian University of Science and Technology NO-7491 Trondheim, Norway 2Department of Structural Engineering, Norwegian University of Science and Technology NO-7491 Trondheim, Norway ajisheng.qin@ntnu.no, bbjorn.holmedal@ntnu.no, codd.hopperstad@ntnu.no Keywords: strain path change, anisotropic work hardening, permanent softening, yield criterion, R-value Abstract.
A cast and homogenized material with random texture previously investigated by Mánik et al. [1] is selected.
The material is prestrained either by compression or rolling, and then tested in uniaxial tension to acquire either reverse softening or orthogonal hardening.
The HAH model can capture most of the transients of this material during reverse and orthogonal SPCs.
International Journal of Plasticity, Int.