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Introduction Mechanical properties can be improved by the combination of material, i.e. so-called composite materials.
Fiber materials widely used are carbon, aramid and glass fiber with the polymer matrix.
Fiber orientation and length influence on tensile properties have also been investigated for several composite materials.
All prepared specimens were tested under tensile testing arrangement to study the tensile strength of the materials.
Callister Jr., Materials Science and Engineering, 2007

Naturally, groundwater contains dissolving materials such as soils, rocks, and minerals, which later release constituents, including iron (Fe2+) and manganese (Mn).
Mansoura Engineering Journal, 42(3) (2018) 7-12
IOSR Journal of Environmental Science, Toxicology and Food Technology, 8(1) (2014) 72-80
Gregory, The reversibility of floc breakage, International Journal of Mineral Processing, 73(2-4) (2014) 251-9
Sheikh Abdullah, Iron and manganese removal by nanofiltration and ultrafiltration membranes: Influence of pH adjustment, Malaysia Journal of Analytical Sciences, 21(1) (2017) 149-158

IBM Journal of Research and Development archive, Vol.23(1979),p.376～385,
Materials selection for microfabricated electrostatic actuators.
International Journal of Computational Engineering Science, Vol.4(2003),p.369～372
Journal of Micromechanics and Microengineering.Vol.16(2006),p. 1800～1810
Mechanics of Materials (3rd Edition), Tsinghua University Press, Beijing(2003)

In the first case, multiple layers of conductive and insulating material are selectively deposited (or removed) above a substrate material (typically silicon), defining the MEMS devices.
A typical step of a MEMS surface micromachining process is the patterning and the subsequent removal of the so called sacrificial layer, usually a photoresist material or an insulating material, needed for the definition of suspended movable structure.
Kumar, “Novel Design of Compact Low Pass Filter Using Defected Ground Structure”, International Journal Microwave and Optical Technology, vol. 4, no. 5, pp. 276-282, September 2009
Ain, “Composite Low Pass Filter Design with T and π Network on Microstrip Line”, Microwave Journal, Horizon House, vol. 50, no. 8, pp. , August. 2007
Norshafinash, “New Approach of Transforming Lumped Element Circuit of High-order Chebyshev Low Pass Filter Into Microstrip Line Form,” International Journal of Electrical & Computer Sciences (IJECS/IJENS), vol. 13, no. 3, pp. 21-30, 2013.

Fig. 1 Schematic diagram of experimental system Material.
Control the material thickness according to the equal volume method, so as to meet the target volume.
Adopting the orthogonal experimental method to analyze the three levels of four factors of sinter particle size, material thickness, air flow rate and inlet air temperature.
Acknowledgements This work is financially supported by the Hebei Province Natural Science Foundation (No.E2011209011) and key laboratory of modern metallurgy technology of Hebei province.
References [1] Hong Xu, Bin Zhao, Zi-wen Fu, et al: Journal of Chinese Society of Power Engineering.

Padmanabhan, A theory of structural superplasticity, Materials Science and Engineering. 29 (1) (1977) 1-18
Pshenichniuk, Superplasticity and grain boundaries in ultrafine-grained materials, Cambridge International Science Publishing Ltd., 2011
Rudaev, Phase transitions in superplasticity, Strength of Materials. 22 (10) (1990) 1445-1451
Petersburg State Polytechnical University Journal. 4-1 (183) (2013) 274-283
Kodzhaspirov, Ultrafine-grained metal materials, SPbSPU, St.Petersburg, 2015.

Despite of having outstanding machinery, it is extremely difficult to machine because of its low thermal conductivity, low modulus of elasticity and strong chemical reactivity with cutting tool materials at higher temperature.
Many researchers have studied the tool life for different metal materials.
These works fall into two categories: First one is conventional method which takes a long time to perform a large number of experiments and consume a lot of work piece materials in order to establish the knowledge base for tool life.
Journal of mechanical science and technology 26: 3605-3616(2012) [7] K.
Composites Science and Technology 88: 16-25(2013) [12] B.

Structure and Properties of Epoxy Resin/Poly (aryl ether ketone) Blends Cured with 4,4'-Diaminodiphenylmethane Zhou Jiangang1, 2 , Zeng Liming1 1.College of Materials Science and Engineering, Wuhan University of Technology, Wuhan 430070,P.R.China;2.Department of chemistry and materials science, Xiaogan University, Xiaogan 432100,P.R.China;email:zjgxzq@yahoo.cn Keywords: poly(aryl ether ketone); epoxy resin; toughening; nanometer size Abstract.
Adding component with low modulus and high elasticity to enhance the matrix toughness is the main way of early research works, the most representative material is carboxyl terminated liquid butadiene-acrylonitrile (CTBN) rubber [1], but the modulus and heat resistance of cured epoxy resin decreased, so these kind of modified systems were limited in engineering application.
In this paper a new kind of Poly(aryl ether ketone) (PEK-C) made in China was selected to improve the toughness of bisphenol A epoxy resin (EP)/4,4'-Diaminodiphenylmethane (DDM) system with the content of PEK-C lower than 10%, the microscopic phase structure and morphology of impact fractured surface were observed by SEM, the phenomenon of microscopic phase separation and heat resistance property were studied by DMA. 1 Experimental 1.1 Materials The bisphenol A epoxy resin (EP) CYD-128 was supplied by Yueyang Petrochemical Corporation of China; Poly(aryl ether ketone) (PEK-C), white powder, was supplied by Xuzhou Engineering Plastics Factory of China; 4,4'-Diaminodiphenylmethane (DDM) was supplied by the Northwest Chemical Research Institute of China. 1.2 Preparation of samples Adding proper amount of PEK-C to EP and heating temperature to 180°C and stirring made the two mixed uniformly, added DDM to the mixture (EP: DDM=100:27) when cooling to 100°C, stirring
Morphology and mechanical properties [J].Journal of Applied Polymer Science, 1981, 26(3):907-919 [2]Keizo Yamanaka, Takashi Inoue.

With the development of science and technology, a new sort of smart nanocomposites, with piezoelectric material as matrix and BNNTs as the reinforcement have attracted an even more increasing interest in the scientific community thanks to the provision of new properties and exploiting unique synergism between materials.
The components of these constants depend on the structure of material.
The material used for matrix is PVDF and the reinforced material is BNNT.
The material constants are listed in table 1.
Hou: International Journal of Solids and Structures 40 (2003), p.105 [4] K.

Table 1 - Chemical composition of the S355NLZ15 steel (base material).
Figure 3 – Base material da/dN vs.
The difference between fatigue crack growth tests using base material and welded material has been identified by several authors.
Bucak, EUR 23252 EN, ISSN 1018-5593, 2008 [4] ASTM E647, ‘Standard test method for measurement of fatigue crack growth rates’, 1995 [5] M Beghini, L Bertini, ‘Fatigue crack propagation through residual stress fields with closure phenomena’, Engineering Fracture Mechanics, vol.36, (3), pp.379-387, 1990 [6] Y Kitsunai, ‘Effect of specimen size and configuration on fatigue crack growth behavior of welded joints’, Proceedings of the ICF International Symposium on Fracture Mechanics, Beijing, Nov. 22-25, 1983, Science Press, Beijing and VNU Science Press, pp. 706-711, 1984 [7] Y Kitsunai, M Tanaka, E Yoshihisa, ‘Influence of residual stresses and loading frequencies on corrosion fatigue crack growth behavior of weldments’, Metallurgical and Materials Transactions A, vol. 29A, pp.1289-1298, April 1999 [8] V Richter-Trummer, P M S T de Castro, ‘Through the thickness measurement of residual stress in a thick welded steel CT specimen by the contour method’, Journal of Strain Analysis for Engineering
Design, vol. 46, pp.315-22, 2011 [9] D A Lados, D Apelian, ‘The effect of residual stress on the fatigue crack growth behavior of al-si-mg cast alloys—mechanisms and corrective mathematical models’, Metallurgical and Materials Transactions A, vol. 37A, pp.133-145, January 2006