Search results

Introduction Use of composites in different applications ranging from aircraft and space systems to the recent smart structure concept has been prolific and this is accentuated by development of new materials and fabrication methods.
Since the behavior of composites up to failure is quite complex and depends on the type of manufacture and materials used in the composites, experimental studies were conducted for material characterization for one type of composite INDCARF using coupons with and without damage.
Kumar, Residual Life Assessment of 60 MW Steam Turbine Rotor, International Journal of Scientific and Research Publications. 2(2012) 1-11
[9] H.Shekhar, Studies on Stress-Strain Curves of Aged Composite Solid Rocket Propellants, Defence Science Journal. 62(2012) 90-94
Iyer, Damage tolerant evaluation of cracked stiffened panels under fatigue loading, Indian Academy of Sciences. 37(2012) 171-186.

With phthalic anhydride, urea, metallic salt and ammonium molybdate as raw materials, Cobalt metal phthalocyanines is prepared by solid-phase method, and the cobalt metal phthalocyanine is modified by the shun dl-aspartic acid anhydride.
Acknowledgements This work was financially supported by the National Natural Science Foundation of China(No.50874087, No.50978212) and the National Science and Technology Support Project (No.2009BAA20B02).
Insect Biochemical Molecular Biology Vol. 30 (2000), p. 915-925 [5] Feigelson L, Muszkat L, Bir L, et al.: Water Science and Technology Vol. 42(1) (2000), p.275-279 [6] Li X.Z., Zhao W., Zhao J.C. : Science in China Series B: Chemistry Vol. 45(4) (2002), p.421-425 [7] Huanshun Yin. in: Studies on Synthesis and Properties of the Soluble Metallophthalocyanine Derivatives.
Chinese Journal of Lasers Vol. 22(11) (1995), p. 853-856(In Chinese) [9] Wenxing Chen, Fan Liu, Wangyang Lv, et al.: China Science Vol. 38(5) (2008), p. 441-448 [10] Huanshun Yin, Jiancheng Deng, Yan Zhou: Dyestuffs and Coloration Vol. 41(3) (2004), p. 150-152 (In Chinese) [11] Liyun Cao and Jianfeng Huang: Northwest Institute of Light Industry Journal Vol. 19(2) (2001), p. 18-22 [12] Tingda Jiang, in: Chitosan, edited by Yu Z.H. volume 1 of introduction, chapter, 1, Beijing Chemical Industry Press (2007)
[13] Yongsheng Ma, Huayu Qiu and Shaoqiang Wang: China Pulp Vol. 23(12) (2004), p. 22-25(In Chinese) [14] Hanfu Wang, Zhiliang Wang and Xin Chen: Journal of Fu Dan University (Natural Science) Vol. 36(1) (1997), p. 107-111(In Chinese) [15] Liyun Cao, JianfengHuang and Guanghua Zhang: China Pulp Vol. 2 (2001), p. 17-19(In Chinese)

Storage modulus were used to denote the resistance deformation ability of materials .Materials had high modulus, which further improved the ability to resistance deformation, consequently, leading to the enhancement of stiffness.
In order to characterize low temperature mechanical properties of materials, Simatos D [9].proposed that fragility parameter was used to characterize low temperature brittleness of materials.
The smaller the m value, the smaller brittleness, the higher strength .That was: materials were not easy to fracture and break.
Polymer Materials Science and Engineering, 2010, 26(12):20 -23
Creep behavior of bisphenol E cyanate ester/alumina nanocomposites .Materials Science and Engineering A, 2010, 527(21):5892-5899

Linear elastic fracture mechanics (LEFM) can be used for description of crack propagation in brittle materials.
Llanes: Journal of the Europian Ceramic Society Vol. 27 (2007), p. 1443
Máca: Journal of Material Science Vol. 42 (2007), p. 6404
Hutař: Computational Materials Science Vol. 46 (2009), p. 614
Ševčík, et al.: Computational Materials Science Vol. 64 (2012), p. 225.

In this paper, Mohr-Coulomb yield condition is transformed strain expressed to stress expressed.Based on this, analysis the effects that geotechnical material parameters internal friction angle φ,cohesion c and Poisson's ratioνto  Mohr- Coulomb yield condition and the development of soil plastic zone.In addition, using the  strength reduction FEM simulating the change of  plastic zone distribution caused by change of the geotechnical materials parameters .The results show that the internal friction angle φ, cohesion c are reducted, the plastic zone expand;Increasing the Poisson’s ratio ν, narrowing the slope’s plastic zone;Plastic zone’s different distribution is caused by different material parameters affect  the yield surface. 
The yield surface of Mohr- Coulomb yield condition is a cone surface of an irregular hexagon section,because the  geotechnical  materials in the compressed states and extended state have different strain Rhodes angle θε.
With yield surface expand, the  degree of difficulty of geotechnical materials reach  yield condition increases,then the plastic zone’s development will decrease.
For the slope with different characters of soil , the distribution of plastic zone development must be different.This research has guiding significance for practical engineering applications Acknowledgements This work was financially supported by Natural Science Foundation (51009054), The Ministry ofEducation, Science and Technology Research Projects（109077） and The Natural Science Foundationof Jiangsu Province (BE2010513) Reference： [1]LIAN Zhenying,HAN Guocheng,KONG Xianjing.Stability analysis of excavation slope by Strength reduction FEM[J].
Chinese.Journal of Geotechnical Engineering, 2001,23(4):407-411(in Chinese) [2] Zienkiewicz O C, Humpheson C, Lewis R W.

Many studying results show that the confined pressure have an important impact on compressive mechanical properties of brittle materials as rock and concrete[8,9].
It is easy to study the materials’ mechanical performance by the active confined pressure, but the device of active confined pressure is also relatively more complex.
Acknowledgment This work was financially supported by National Natural Science Foundation of China (51104123) and  Science and Technology Support Item of Sichuan (2011GZ0064).
[5] Kang Y A,Zhang J Y.Uniaxial Compressive behavior of open-cell and closed-cell aluminum foams.Materials Review,Vol.19 (2005), p.122-124.
(In Chinese) [7] Shi S Q,Kang J G,Sui S B.Experimental study of quasi-static and dynamic compressive property of close-cell aluminum foam.Rare Metal Materials and Engineering, 2011，40(2)：150-154.Vol.26 (2006), p.46-52.

Introduction Drilling is one of the very important machining processes on any materials, including composite materials.
[2] Khashaba, U., El-Sonbaty I., Selmy A., Megahed A., Drilling analysis of woven glass fiber-reinforced/epoxy composites, Journal of Composite Materials, 47(2), (2012) 191-205
H., Effect of tool wear on delamination in drilling composite materials, International Journal of Mechanical Sciences, 49, (2007) 983-8
[30] Khashaba, U., Drilling of polymer matrix composites: A review, Journal of Composite Materials, 47(15), (2013) 1817-32
[34] V Krishnaraj, S.V.G.S., An investigation on high speed drilling of glass fibre reinforced plastic (gfrp), Indian Journal of Engineering & Material Sciences, 12, (2005) 189-95

Yu, Materials Science and Engineering A 393 (2005) 204
Crist, Materials Science and Engineering A 243 (1998) 109
Soo, Journal of Materials Science (2011)
Hardwicke, Journal of Materials Engineering and Performance 14 (2005) 709
Lee, Materials Science and Engineering A 485 (2008) 601

Even though at high temperature, the adhesive shearing strength still stays above 0.6MPa, which is satisfied with the requirement of pavement materials for steel box girder bridge deck.
Master thesis of Changsha University of Science & Technology.(2005)
A New Study on Deck Surfacing Anti-slipping Materials for Steel-Box Girder Bridge[J].
Journal of Buding Material, Vol. 12(2009):276-280
Journal of Chongqing University (Natural Science Edition).

In this paper, octanol, dodecanol, tetradecyl alcohol, maleic anhydride, allyl chloride, sodium bisulfite are used as the main raw materials, and diesters have been synthesized.
Experiment Material and Appliance.
Sanderson: Journal of Colloid and Interface Science, Vol. 296(2006), p. 316
[4] Z H Zhang, C Liu: Journal of University of South China (Science and Technology) Vol. 18(2004), p. 98
[8] A X Hu, Z G Yao, X Yu: Journal of Applied Polymer Science, Vol. 113(2009), p. 2202.