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As the high-tech materials appeared, sports performance is developing rapidly.
The appearance of new technique and new materials has made the athletes' performance rapidly upgraded.
In twentieth Century, our country has researched about nano materials and exercise ligament injury.
Journal of Journal of An qing Teachers College, natural science, 2004, (4) [9]LI Chun-yan,LIU Xing-liang,XIAO Yan-fen.
Study of Application and biosafety of Nano materials in Sports Engineering [J].Sports science of human body.2011,(9):100 [10]YE Ling, SU Qin, ZHOU Xuedong.

Introduction With the enhancing awareness of environment protection and sustainable utility of resources, it becomes a hot research area to use natural or renewable raw materials to produce biodegradable materials.
[2] Zhang Huizhen, Liu Bailing and Luo Rong: Journal of the Graduate School of the Chinese Academy of Sciences 22(2005): 658-664
[5] Zhang Huizhen, Liu Bailing and Luo Rong: Journal of the Graduate School of the Chinese Academy of Sciences 23(2006): 607-613
[7] Liu B L, Zeng X CH, and Yang J H: Chinese Journal of Materials Research 14(2000): 108-112
[18] Zhang Ruiping, Ding Matai: Journal of Functional Materials 38(2007): 2004-2007.

Materials and methods PCL pellets (Mw = 70,000-90,000), gelatin powder were purchased from Sigma-Aldrich.
Mishra, Fabrication and characterization of PCL/gelatin composite nanofibrous scaffold for tissue engineering applications by electrospinning method, Materials Science and Engineering. 3 (2013) 1228-1235
Ramakrishna, Polypyrrole-contained electrospun conductive nanofibrous membranes for cardiac tissue engineering, Journal of Biomedical Materials Research Part A. 99A (2011) 376-385
Lee, Hydrophilized polycaprolactone nanofiber mesh-embedded poly(glycolic-co-lactic acid) membrane for effective guided bone regeneration, Journal of Biomedical Materials Research Part A. 91A (2009) 400-407
Chung, Electrospun nanofibers composed of poly(ε-caprolactone) and polyethylenimine for tissue engineering applications, Materials Science and Engineering: C. 29 (2009) 1725-1731

Developments in materials available for AM have expanded into metal matrix composite materials.
Gadaud, Additive layer manufacturing of titanium matrix composites using the direct metal deposition laser process, Materials Science and Engineering: A 677 (2016) 171-181
Xi, Research on development of in situ titanium matrix composites and in situ reaction thermodynamics of the reaction systems, Journal of University of Science and Technology Beijing, Mineral, Metallurgy, Material 13(6) (2006) 551-557
Pohl, Effects of laser sinterinng processing parameters on the microstructure and densification of iron powder, Materials Science and Engineering: A 359(1-2) (2003) 119-128
Rubenchik, Observation of keyhole-mode laser melting in laser powder-bed fusion additive manufacturing, Journal of Materials Processing Technology 214(12) (2014) 2915-2925

Material Mechanical Performance about Worm Bending and Twisting Deformation for Civil Engineering Xuqin Chen1, a, Guilan Jiang2, b, and GuangZhen Cheng1, c 1Huzhou Teachers College, Huzhou, Zhejiang Province 313000, P.R.
Shaft material is 45 steel, with quenching and tempering treatment, [σ]=60N.mm.
Shan: Mechanics Materials (Higher Education Press, China 2008) (in Chinese)
Liu: Journal of Changsha Railway University (social science edition) 2004(12), pp.147-148 [4] G.Z.
Liu: Materials Mechanics (Higher Education Press, China 2004) (in Chinese) [6] Y.J.

The feed rate of nozzle and the bond materials have significant impact on the 3D surface roughness of the wheel and dressing efficient.
Several grooves were generated by abrasive water jet on the wheel surface to compare the influence of the nozzle feed rates and the different binder materials.
(2) The nozzle feed rate and the bond materials have significant impact on the 3D surface roughness of the wheel and dressing efficient
State of the art of research and development in abrasive waterjet machining, Journal of Manufacturing Science and Engineering.
Key Engineering Materials, 2001, 202-203:171-176 [7] D.A.

Fatigue & fracture of engineering materials & structures, 40(4), 471-495
Mechanics, Materials Science & Engineering, 6
Materials Science and Engineering: A, 556, 500-509
Journal of Materials Engineering and Performance, 29, 2113-2124
Mechanics, Materials Science & Engineering, DOI, 10

Acknowledgment Work was supported by the National Natural Science Foundation of China (Grant No. 10972030) References [1] B.
Jiang: The Chinese Journal of Nonferrous Metals Vol. 16 (2006), p. 35 [2] W.X.
Zhao: Materials Science and Technology Vol. 15 (2007), p. 746 [4] X.Y.
Tang: Material and heat treatment Vol. 38 (2009), p. 7 [6] B.
Sarma: Materials Science and Engineering Vol.

Materials and methods Materials and equipments.
A peristaltic pump was used to supply the materials in the investigation.
Journal of Food Science. 69 (2004) 241-248
Journal of LWT -Food Science and Technology. 43 (2010) 1067-1073
Journal of Zhejiang University (Sciences Edition).32 (2005) 62-65

In order to profound the function of stress wave in vibration turning and present the effectiveness of instant change of stress and strain in the workpiece under the shock load, put forward a simulation model of materials obeying Prandtl-Reuss flow principle with non-linear constitutive relation for vibration turning with low frequency.
Acknowledgements The study is supported by Fujian Natural Science Fund (2010J01295) and by Xiamen Science and Technology Project Fund (3502Z20093031), also by Heilongjiang Natural Science Fund (E201043) References [1] Kamel, M M, El-Ganaini, W A A, Hamed, Dr: Journal of Mechanical Science and Technology, Vol. 23(8)( 2009), p. 2038 [2] L Zesheng; Y Liang.
Journal of Harbin Institute of Technology, Vol. 40(9)( 2008), p. 1400
J. of Rock Mechanics and Mining Sciences, Vol. 46(3)( 2009), p. 471 [10] L Zesheng; Y Liang.
Journal of Harbin Institute of Technology, Vol. 40(9)( 2008), p. 1400.