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Under fatigue loading, the element stress, failure and materials degradation should be analyzed in each loading of cycle.
Alschweig: Fatigue of Fibrous Composite Materials, (1981), p. 31 [9] A.
Shi: Mechanical Science and Technology, (1996) p. 897 [11] M.
Lessard: Journal of Composite Materials, 34 (2000), p. 1056 [12] M.
Lessard: Journal of Composite Materials, 34(2000), p. 1081 [13] K.

Y2008A27) and Science and Technology Planning Project(No.
Sichuan Building Science,4(2007),p.193-196 [4] J.Zhang,Z.J.Guo and X.
Industrial Engineering Journal,9(2007),p.93-96 [7] D.C.Ding,H.J.Min and G.M.Wu:Overview of enterprise risk management modeling.
Science of Science and Management of S.&.T,7(2008),p.189-184 [8] F.Y.Luo,G.B.Wang and W.J.Zhang:Study on construction project cost breakdown system.
Journal of tongji university (natural science),8(2005),p.1122-1126 [9] N.H.Lv:Investment risk analysis and evaluation of engineering project in present condition.

Material and Methods Equipment and material.
Forestry Science and Technology, 2002, 27(3):35-38
Journal of Wood Science. 2002, 48（4）: 283-288
Journal of Wood Science. 2003, 49（5）:140-144
Journal of Wood Science. 2006, 52（4）:348- 352．

Khayyam Nekouei4,d 1 Master student, School of Metallurgy and Materials Engineering, College of Engineering University of Tehran, P.O.
Cao, “ZnO Nanostructures for Dye-Sensitized Solar Cells,” Advanced Materials, vol. 21, no. 41, pp. 4087–4108, Nov. 2009
Ip, “Recent progress in processing and properties of ZnO,” Progress in Materials Science, vol. 50, pp. 293–340, 2005
Wang, “Nanobelts , Nanowires , and Nanodiskettes of Semiconducting OxidesÐFrom Materials to Nanodevices **,” Advanced Materials, vol. 15, no. 5, pp. 432–436, 2003
Petrov, “On the thermal decomposition of the zinc(II) hydroxide chlorides Zn5(OH)8Cl2·H2O and Β-Zn(OH)Cl,” Journal of Materials Science, vol. 29, no. 20, pp. 5429–5434, 1994

Balkas, Materials Science Forum 858 (2016) 5–10
Chen, The International Journal of Advanced Manufacturing Technology 89 (2017) 619–627
Xipeng, The International Journal of Advanced Manufacturing Technology 108 (2020) 997–1006
Lin, The Journal of Ceramic Process Research 10(3) (2009) 351–354
Watanabe, in Proceedings of the 12th International Symposium on Advances in Abrasive Technology, edited by Advanced Materials Research (Trans Tech Publications), 2009, pp. 282–287.

Failure Analysis of the Turboshaft Fracture 1.1 Macro Analysis of the Turboshaft Fracture Material fracture failure of the torque converter turboshaft used as 20CrMo, quenched and tempered (HRC28 ~ 32), the outer surface carburizing (HRC58 ~ 62), effective case depth 1.1 ~ 1.3mm (HV550).
Fig. 4 Torsional shear stress on the turboshaft 2.3 Turboshaft Strength Calculation The spline shaft root diameter at the transition, the diameter , the choice of materials, carburizing, "Mechanical Design Manual (Volume 1)" Recommended ultimate tensile strength of the material, [2]. 1)The shear stress of the turboshaft Calculating the shear stress of the turbine shaft ,according to "Mechanical Design Handbook (Volume 2)" [3]
Improved turboshaft from finite element analysis results, the maximum shear stress for the entire turbine shaft material is 583.77Mpa, which is less than the allowable limit of shear strength, and the maximum stress point is not the root fillet with splined shaft section, such as Fig.5. 3.2 Improved Turboshaft Strength Calculation The improvement is the turboshaft strength calculation found since journal reduced, so that the shear stress is increased to correspond to 310Mpa, but the stress concentration factor, which does not affect the strength of the turboshaft.
In the design of the subsequent parts of the shaft, to focus on the transition journal, holes, fillets and keyway and other areas prone to stress concentration designed to avoid the structural design of the product itself unreasonable failure of parts caused by the fracture.
[4] DIN 743,in: Teile 1-3, Tragfahigekeitsberechnung von Wellen und Achsen(2000) [5] Hsien Loong , Zhang Rui , Huangwei Hao, in: Machinery Failure Analysis [M], Shanghai Science and Technology Publishers (2009) [6] Yung-Li Lee, Jwo Pan, RBHathaway, MEBarkey.

Materials and Methods All chemicals used in this experiment were analytical grade and used as-received without further purification.
Acknowledgement This research was initially carried out by authors at School of Materials and Mineral Resources Engineering, Universiti Sains Malaysia under research grant of both eScienceFund (03-01-05-SF0330).
Penner, Advanced Materials. 12 (2000) 12 [6] C.T.G.
Weller, Advanced Functional Materials. 18 (2008) 3850–3856
Kim, Journal of Colloid and Interface Science. 2 (2007) 417-424

New knowledge in findings potential usage of natural fiber as new material in composite technology has been increased gradually in years and these natural fiber materials are well known as competent material which can become an alternative material to the conventional and synthetic materials for suitable applications.
Introduction The usage of natural fibers and other possible agro-waste fibers as new material reinforcement in polymer composites increases in years and these materials are gaining much attention in accordance to environment protection and sustainability [1-3].
These natural fibers are well known as an alternative material to the conventional and synthetic materials such as carbon fiber, aramide, glass fiber and etc due to its high performance applications.
The advantages of using these materials are low cost for engineering materials, low density, good specific strengths and modulus, biodegradability and enhanced energy recovery [4, 5].
The materials used in this research are Casuarina equisetifolia (C.equisetifolia), unsaturated polyester resin, and methyl ethyl ketone peroxide (MEKP).

This machine could generate complicated 3D shapes out of ABS material.
This included the jet nozzle that ejected the ABS material and the base support.
and Ahmed, N.A., ‘Theoretical calibration of a five hole probe for highly 3D flow’, Meas Science and Technology, Vol. 13, No. 7, 2002, pp1100-1107
[34]Ahmed, N.A., Elder, R.L., Foster, C.P. and Jones, J.D.C., ‘Miniature Laser Anemometer for 3D Measurements’, Measurement Science and Technology,Vol. 1, No. 3, 1990, pp. 272-276
Vols. 215-216 (2012) pp 785-795, © (2012) Trans Tech Publications, Switzerland [83]Shun, S., and Ahmed, N.A., ‘Rapid Prototyping of Aerodynamics Research Models’, Applied Mechanics and Materials Vols. 217-219 (2012) pp 2016-2025,© (2012) Trans Tech Publications

There are mainly two model materials, soil slope and concrete lattice terrier.
Journal of Engineering and Applied Science, 1998. 81(5): 259-284
Teotechnical Testing Journal, 1993, 16(2): 172-187
Journal of Lanzhou University of Technology, 2010, 36(5): 108-112
(Natural Sciences), 2009, 31(5): 46-48.