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With the industrial progress and development of science and technology, the prevalence of pressure vessel use has grown.
A curve determined by the material properties(Different materials correspond to different curves.
C and m are constants which are related to materials and can be measured through the experiment, then -the highest stress cycling times that the pressure vessel can bear can be calculated by . is the residual life of pressure vessel.
References [1] Ming-xing Li, Pressure Vessel Safety Assessment and Detection, Journal of Wei fang University. 10(2010) 13-15
[9] En-kui Song, New method of the residual life prediction of pressure vessel defect, Journal of Sichuan University(Natural Science Edition). 49(2012) 1275-1278

Introdution Biodegradable polylactic acid (PLA) fiber is considered to be a recycling raw materials and novel functional fiber materials.
Experiment Materials.
Wang: European Polymer Journal Vol. 2006, p. 42 [2] J.
Yang: Colloid and Interface Science Vol.310(2007), p. 106 [7] X.
Wenfang: Journal of Tianjin Polytechnic University Vol.25(2006), p. 51 [9] D.

Environment effect of geotechnical material.
Applied Mechanics and Materials, 2013, (Vol. 419): 837-841
Applied Mechanics and Materials, 2013,Vols. 405-408: 10-14
Sichuan Building Science, 2011, 37 (5):146-148
Journal of Basic of Science and Engineering, 22, (2), 343-349 (2014)

Materials Science Forum Vols. *** (2004) pp.844-849 online at http://scientific.net  2004 Trans Tech Publications, Switzerland Analysis of Step Interference Fit of the High Speed Motorized Spindle with Finite Element Method P.
In the pole coordinate, as the mating surface is axial symmetry, the distribution of the stress and deformation is also axial symmetry, and the Materials Science Forum Vols. *** 845 tangential deformation and shear stress can be ignored.
According to equation (9) and (10), the relationship between the torque and the contract pressure can be derived as following, Materials Science Forum Vols. *** 847 p k M Ba c t = 2 2 πµ (11) Substituting equation (8) into equation (11), the relationship of the interference, contact pressure and the angular velocity for the high speed spindle can be drawn from following equation, 2 322 2 2 2 2 2 2 2 )1)(23)(1( ) 1 1 1 1 ( )1( e ie i i e e t c Ec acc c c c c EBa Mk −−+ + − + + − + − =∆ υυρω πµ υ (12) According to equation (12), the interference of the high speed spindle consists of static section and dynamic section.
The stress in shaft is much lower, its maximum stress occurring at the end of contacted Materials Science Forum Vols. *** 849 surface and is about 65.869 MPa.
Ma: Chinese Journal of Mechanical Engineering Vol. 13 (2000), p. 184 [2] P.

Journal of Southeast University(Natural Science Edition). 2010(5): 1052-1056
Aiaa Journal. 1973, 12(2): 185-190
Aiaa Journal. 2001, 39(2): 271-278
Smart Materials and Structures. 2001, 10(3): 446
Journal of Tongji University(Natural Science Edition). 2003(3): 258-262

At the same time, the materials were removed and the chips were formed.
（3） Where,, , are frictional shear stress, frictional coefficient, normal stress, shear strength of materials, respectively.
By composing different tool materials with tool geometries in simulation, the method can be used to realize the optimal design of cutting tool, and reduce the tool wear and enhance tool life.
Acknowledgements The authors would like to gratefully acknowledge the support of National Natural Science Foundation China (No. 11202179) and National Natural Science Foundation of Shandong Province (No.ZR2012EEQ006).
Ke, H.Y .Dong: Journal of Zhejiang University Engineering Science vol. 42(2008), p.397-402 [5] G.

Since, high internal pressure is used, dies and inserts are made from high strength materials, and designed to be closed for safty reasons.
During die and process designs, material properties of tubes, stress–strain relationship (flow stress) is necessary for study of plastic deformation of tubular materials.
Fig. 6 Comparison of bulge height between FEA results and hydroformed tubes Conclusion A new analytical model for flow stress determination of tubular materials is proposed.
[2] Muammer Koç, Yingyot Aue-u-lan, Taylan Altan : On the Characteristics of Tubular Materials for Hydroforming - Experimentation and Analysis, International Journal of Machine Tools & Manufacture, 41 (2001), pp. 761–772 [3] Y.M.
Altan: Evaluation of tubular materials by a hydraulic bulge test, Journal of Machine Tools & Manufacture 47 (2007), p. 343-351

Introduction Technological process of manufacturing products from polymeric materials typically includes a cooling stage accompanied by crystallization of the material.
References [1] Shardakov I.N., Matveyenko V.P., Pistsov N.V., Beghishev V.P., Simulation of thermomechanical processes in crystallizing polymers, Polymer Engineering and Science. 37(8) (1997) 1270-1279
[2] Zavyalova T.G., Trufanov N.A., Constitutive relations for a viscoelastic body under crystallization conditions, Journal of Appl.
[4] Dupaix R.B., Boyce M.C., Constitutive modeling of the finite strain behavior of amorphous polymers in and above the glass transition, Mechanics of Materials. 39 (2007) 39–52
[5] Rogovoy A.A., Constitutive relations for finite elastic-inelastic strains, Journal of Appl.

As one of nanometer materials, nanometer calcium carbonate is widely used in plastic, rubber, paper, paint and ink, etc.
The effects of heat transfer and material transfer were improved by the ultrasonic effects which were mechanical effect, cavitation effect, and chemical effect of ultrasonic.
Thus, appropriate concentration of Ca(OH)2 milk should be chosen to ensure that rapid nucleus formation and action of material transfer of ultrasonic could be given a full play.
References [1] Zhu Yong, Xie Zhong, Liu Yawei: Inorganic Chemicals Industry Vol. 37(2005), p.37~39 [2] J uvekar V A, Sharra M: Chemical Engineering Science Vol. 28 (1973), p.825 - 837 [3] Zhuge Lanjian, Zhang Shicheng, Han Yuexin: Journal of the Chinese Ceramic Society Vol. 27 (1999), p.159~163 [4] Yamada H, Hara N: Gypsum & Lime Vol. 194 (1985), p.3 -12 [5] Feng Ruo, Li Huamao: Biochemistry and its application, edited by Xi Zhengxi, Anhui Science & Technology Publishing House, Hefei, China, (1992)
[6] Gu Yanfang, Wang Song: Journal of East China University of Science and Technology Vol.19 (1993), p.550

When receiving the paper, we assume that the corresponding authors grant us the copyright to use the paper for the book or journal in question.
CMES: Computer Modeling in Engineering & Sciences 40 (2): 155-174. (2009)Dj.M.
Mishing, in: Diffusion Processes in Advanced Technological Materials, edtied by D.
Smart Science 1 (1): 59–63. (2013)G.
Clem: submitted to Journal of Materials Research (2003) [6] Niessner, M., Schrag, G., Iannacci, J. & Wachutka, G.: Macromodel-based simulation and measurement of the dynamic pull-in of viscously damped RF-MEMS switches.