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Materials Silk power spinning was purchased from Heng Da Textile Co., Dalian.
So we chose 1:20 as the material-solvent ratio.
Wool Textile Journal 2006;12 :5 - 8
Jiangsu Journal of Agricultural Sciences 2005;22(2):159 - 161
Journal of Yangzhou University: Agricultural and Life 2006;27(3):81 – 83

Table 1 Chemical Composition (%) of Q345E Steel Designation of Material C Si Mn P S V Nb Ti Al Q345E 0.15 0.32 1.48 0.011 0.003 0.02~0.15 0.015~0.060 0.02~0.20 0.032 According to GB / T 6398-2000 “Experimental Methods for Fatigue Crack Growth Rate of Metal Materials", experiments were conducted by using the equipment MTS 810 material testing system under the conditions as follows: the maximum load , the stress ratio , the frequency of 10 Hz, the load waveform of a sine wave.
Fig. 1 Curve Fig.2 Curve In accordance with the Pairs Equation [1]: (4) Where: is the crest value of the stress intensity factor, C and m is the constant of materials.
With the increasing rate of crack growth, it goes up while the Constant C of the materials in the Pairs Equation becomes gradually smaller and Constant m increases.
The crack growth rate da/dN corresponding to different survival rates p goes up with the increasing rate of the survival rate, the Constant C of the materials in the Pairs Equation becomes gradually smaller and the Constant m increases.
Erdogan; A Critical analysis of Crack Propagation Laws; Journal of Basic Engineering; Vol. 85(1963) ; p. 528-534 [2] Dr.

Dunand2,f 1 Department of Materials Science and Engineering, Boise State University, Boise, ID 83725, USA 2 Department of Materials Science and Engineering, Northwestern University, Evanston, IL 60208, USA 3 also at Harbin Institute of Technology, West Dazhi Street No. 92, 150001, Harbin, P.
Smart Structures and Materials 2005, San Diego, CA, 2005, SPIE Proc.
Müllner: Materials Science and Engineering A Vol. 234 (1997), p. 94 [14] Y.
Dunand: Advanced Engineering Materials Vol. 10 (2008), p. 379 [17] I.
Kostorz: Materials Science Forum Vol. 583 (2008), p. 43 [22] H.

So it will affect the comprehensive performance of composite materials.
References [1] Dongsheng Jiao, Zongwen Ren, Jun Liu, et al.: Journal of materials engineering, No.10( 2007), p.11.
(In Chinese) [2] Xinling Geng,　Jun Liu,　Yuzhu Ren,　et al.: Journal of aeronautical materials, No.3, Vol. 26 (2006), p. 283.
(In Chinese) [3] Xueyi Liu, Chuang Chen, Yanyu Yang: Insulating materials, No.1, Vol. 45 (2012), p. 15.
(In Chinese) [4] Liping Liu, Huanghai1 Qian, Guolin Liu, et al.: Journal of materials engineering, No.8 (2010), p. 92.

Materials and Method of Holding Research We used polyvinyl acetatcement PVAC and perchlorovinyl XV-161 paints.
Engineering Materials and Technology. 737 (2017) 179-183
Leguillon, Effect of residual stresses on the propagation of interface cracks between dissimilar brittle materials: contribution of two and three-dimensional analyses, European Journal of Mechanics, A/Solids. 35 (2012) 97-110
Ivaschenko, Evaluation of the destruction of the coating depending on its thickness, Research Journal of Applied Sciences. 11 (2016) 891-893
Evans, Delamination of multilayer thermal barrier coatings, Mechanics of Materials. 31(7) (1999) 431-447

The computing formula of row spacing and stepover are deduced to ensure high material removal rate and machining efficiency.
Statistics show that slotting and expansion slotting machine phase occupy a large percentage of material removal time, 60%-90%.
Hamdy, in: Optimal CNC plunger selection and toolpoint generation for roughing sculptured surfaces cavity, Journal of Manufacturing Science and Engineering, no. 128, pp. 1025–1029, 2006
Han, in: Cutting path planning for ruled surface impellers, Chinese Journal of Aeronautics, vol. 21, no. 5, 2008
Lillholm, in: Quaternion, interpolation and animation, Department of Computer Science, University of Copenhagen, Tech.

Jawahir: International Journal of Mechanical Sciences Vol. 47 (2005), p. 1611-1628
Guo: International Journal of Mechanical Sciences Vol. 42 (2000), p. 10691086
Shirakashi: Journal of Materials Processing Technology Vol. 62 (1996), p. 448-453
Dias: Journal of Materials Processing Technology Vol. 96 (1999), p. 225-233
Lebrun: Machining Science and Technology Vol. 8 (2004), p. 357-376

Introduction In metal cutting operations, the heat generation and heat conduction during machining depends mainly on tool and workpiece materials, process parameters, and the material remove rate of the workpiece.
Thermal Conductivities of Tool Materials For thermal analysis of the process, the thermal conductivities of coating materials occurring at higher temperatures are varied.
[2] Y.Dogu,E.Aslan,N.Camuscu: Journal of Materials Processing Technology,Vol.171 (2006), pp. 1-9
[3] R.Komanduri,Z.B.Hou: International Journal of Mechanical Sciences, Vol.43 (2001), pp. 57-88
[13] W.Grzesik,M.Bartoszuk,P.Nieslony:Journal of Materials Processing Technology,Vol.164-165 (2005), pp. 1204-1211

Materials Science and Engineering A 463, 2007, pp.138–146 [4] J.
Materials Science Forum, Vols. 500-501, 2005, pp. 565-572 [6] P.M.
Materials Science Forum Vols. 500-501, 2005, pp. 753-760 [9] E.
Journal of Achievements in Materials and Manufacturing Engineering.
Journal of Materials Processing Technology, 113, 2001, pp. 594-598 [18] A.R.

Thus, nano-materials has been gained constant and increasing attention.
Materials and methods Materials.
Nano-materials used in this study were nano-CaCO3 and nano-SiO2.
But the slump of C50 concrete with nano-materials decreased a little more then that of C30 concrete with nano-materials, compared to that of plain concrete.
The reasons may be as follows: The lower water/binder ratio and the larger dosage of nano-materials of C50 concrete means more water was needed to package the surface of nano-materials [2].