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The randomness of cumulative fatigue damage process was caused inner dispersion, the uniformity microstructure of materials, and external dispersion, the randomness of the load.
Then dispersion of instantaneous cumulative damage statistical is not considered caused by dispersion of materials and loads[5-6].
Inner dispersion is an inherent specialty of materials got through experiment, while external dispersion is mainly reflected by randomness of the load, containing random arrangement and the random distribution of load size.
Material and heat treatment.
Journal of Mechanical Engineering Science, July 2001, vol215(7), pp773~784(12) [5] Weixing.Yao.

It forms viscous solutions when dissolved in water as other polysaccharide gums extracted from plant materials.
Materials and Methods Materials.
Alok:Journal of Pharmacy and Pharmaceutical Sciences Vol. 5 (2002) No.1, pp.12-18 [9] K.
Chumrum: Advanced Materials Research Vol. 233-235 (2011), pp. 1388-1391 [12] A.B.
Sittikijyothin:Advanced Materials Research Vol. 239-242 (2011), pp. 477-480

The new polymer developed was characterized by the analysis of its barrier properties, optical, mechanical properties, scanning electron microscopy (SEM), thermal, and its antioxidant efficiency. 1 MATERIALS AND EQUIPMENT S 1.1 Materials and Reagents The Low Density Polyethylene(LDPE) was kindly provided by China Petrochemical (Shanghai, China).
Food Science, 2008, 29( 9) : 448-450
Modern Food Science and Technology, 2008, 24(8): 851-855
[4] ASTM,E398,Standard Test Method for Water Vapor Transmission Rate of Sheet Materials Using Dynamic Relative Humidity Measurement [S]. 2003
Journal of agricultural and food chemistry, 2011, 59(14): 7832-7840

The use of concentrating photovoltaic for higher energy yield also increases the thermal degradation of the PV cell material.
[4] Sendhil Kumar Natarajan, Tapas Kumar Mallick, Matty Katz, Simon Weingaertner, Numerical investigations of solar cell temperature for photovoltaic concentrator system with and without passive cooling arrangements, International journal of thermal sciences 50 (2011), pp. 2514-2521
[17] Sendhil Kumar Natarajan, Tapas Kumar Mallick, Matty Katz, Simon Weingaertner, Numerical investigations of solar celltemperature for photovoltaic concentrator system with and without passive cooling arrangements, International journal of Thermal sciences 50 (2011), pp. 2514-2521
El-Sherif, Enhancing the performance of photovoltaic panels by water cooling, Ain Shams Engineering Journal (2013) 4,pp. 869–877
[23] Burak Yazicioğlu, Hafit Yüncü, A correlation for optimum fin spacing of vertically-based rectangular fin arrays subjected to natural convection heat transfer, Journal of thermal science and technology, 29, 1, 2009, pp. 99-105

Introduction Multilayers constitute a group of materials enjoying a growing interest of scientists owing to their unique properties.
Being composed of alternate layers of different metals or their alloys, these materials exhibit unusual electrical, optical, magnetic and mechanical properties [1,2].
Experiment Material.
Zhao: Materials Characterization Vol. 59 (2008), p. 1285 [9] T.
Brückl: Journal of Magnetism and Magnetic Materials 316 (2007) p.998B

Wan2,3 1College of Physics and Electronic Information Science, Tianjin Normal University, Tianjin, 300387, P.R.
Nanostructure multiphase composites and multicomponent materials in which the dimensions of the individual phases or components are in the range from 3 to 20 nm represent a new class of engineering materials [5,6], These materials consists of nanometer sized crystals embedded in a preferable matrix which may be either amorphous or nanocrystalline [7].
Acknowledgements This work was supported by National Basic Research Program of China (973 Program, 012CB933604), National Natural Science Foundation of China (51272176, 11075116), and the Key Laboratory of Beam Technology and Material Modification of the Ministry of Education, Beijing Normal University, China.
Mai, Residual stress, microstructure, and structure of tungsten thin films deposited by magnetron, Journal of Applied Physics 87 (2000) 177
Mateeva, I.Dahan, et al., Wettability of NiAl, Ni-Al-N, Ti-B-C, and Ti-B-C-N films by glass at high temperatures, Surf Coat Technol. 133-134 (2000) 8 [5] H.Gleiter, Nanostructured materials: basic concepts and microstructure, Acta Mater 48 (2000) 1-29 [6] P.

Key Laboratory of New Packaging Materials and Technology , Hunan University of Technology,China; 2.
This work focuses on the influences of synthesis parameters such as PEG volume,reaction temperature, final solution pH,anhydrous ethanol volume and soluble glass concentration on the average particle size of products and characterisation of silica powders derived from soluble glass and silicon tetrachloride. 2 Na2SiO3 + SiCl4 + 3n H2O = 3 SiO2•n H2O + 4NaCl Materials and methods 2.1 Reagents and raw materials The silicon tetrachloride and soluble glass used in this work was taken from Zhuzhou Chemical Industry Group Company Limited in Hunan province.
(In Chinese) [2]Yue-lin Wang.The comprehensive utilization technique of silicon tetrachloride,the byproduct of polysilicon [J].Applied science and technology,2009,17(2):22-24.
(In Chinese) [3]J.R.Heley,D.Jackson,P.F.James.Fine low density silica powders prepared by supercritical drying of gels derived from silicon tetrachloride[J].Journal of Non-Crystalline Solids186(1995)30-36
[6]Ming-ming Zhang.Preparation of spherical silica nanoparticles[D].Nanjing:Nanjing University of Science degree thesis.

Joseph et al. [2] enlightened the favorable aspects of natural fibers that have found use as potential source for making low cost composite materials.
Materials and Design, 32: 453-461
Composites Science and Technology, 53(1): 99 -110
Journal of Applied Polymer Science, 20(11): 273-294
Composites Science and Technology, 41(2): 165-178

Processing Parameters and Microstructure of 6mm 6061 Aluminum Alloy Joints by Friction Stir Welding Yang Jia1, a, Ke-Hong Wang2,b 1,2School of Materials Science and Engineering, Nanjing University of Science and Technology, Nanjing, China ajiayang@njust.edu.cn, bwkh1602@126.com Keywords: Friction stir welding, Processing parameters, Mechanical properties, Microstructure, Aluminum alloy Abstract.
Plastic strain accumulated in the materials with stirring, and as a result, high density of dislocations were formed within grain interiors.
Due to the high stored energy, the new recrystallized grains are much smaller than those of parent materials.
Friction stir welding process goes commercial: Welding Journal, Vol.76(1997), P.55
Orthogonal and uniform experimental design: Science Press(2001)

The further growing operation parameters of the developed materials can be ensured via partial replacement of clay by fillers.
The structure of heat-resistant composite In regard to porous composite materials it is important to know the influence of foaming admixtures on physical and chemical processes.
IR-spectra of the samples of mono-component binding material based on HAC are notable for gradual increase in maximal number within a hardening period until 24 hours.
To improve thermal stability of the material fine-ground refractory clays (fireclays) and dinas fillers, as well as other correction admixtures were used (Table 2).
Beregovoi, Porous glass-crystal materials for thermal protection of building and structures, ARPN Journal of Engineering and Applied Sciences. 11, 19 (2016) 11709-1712.