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Experimental Section Materials PVDF (Solef 1010) was purchased from solvey Co., Ltd.
Wang: Journal of Membrane Science, Vol. 285 (2006: 290
Shen, et al: Journal of Membrane Science, Vol. 337 (2009):257
Sadatnia: Journal of Membrane Science, Vol. 325 (2008): 92
Li, et al: Journal of Membrane Science, Vol. 326 (2009):103

This paper presents work done on a bolted connection in carbon-fiber reinforced polymer composite materials.
Introduction Carbon fiber reinforced polymer (CFRP) composite materials have gained widespread use in aerospace structures due to their low weight, high strength, and high stiffness properties.
Furthermore, the brittleness of composite materials coupled with the possibility of high stress concentrations due to anisotropy require special considerations when designing such connections [2].
"A design methodology for mechanically fastened joints in laminated composite materials."
Journal of Sound and Vibration.

Introduction Concrete is one of the most important and one of the most widely used building materials.
Wang: Journal of Sichuan University (Engineering Science Edition), Vol.42(2010)No.5,pp.160-163
Song:Journal of Dalian university of technology,Vol.50(2010)No.3, pp.393-398
Jiao: Journal of Sichuan university (engineering science edition),Vol.41( 2009)No.5, pp.82-86
Zhao: Journal of building materials, Vol.10(2007)No.4, pp. 397-401

Fracture Behavior of Brittle Materials under Complex Loads L.
Bao 2 1 Beijing University of Technology, Beijing 100024,China 2 China Building Materials Academy, Beijing 100024, China Keywords: Inclined crack, Complex stress, Fracture, Brittle materials Abstract.
When the angle is greater than 20 degree, the equivalent method would overestimate the fracture resistance of materials.
Garcia: International Journal of Fracture, Vol. 80 (1996), p. 165
Mencik: Strength and Fracture of Glass and Ceramics (Elsevier Science Publishing, 1992).

With the progress of science and technology, people's desire to improve the work efficiency became stronger and stronger.
The two long sides are made by elastic materials.
Table.1 The parameters of the components Name Material Young modulus （MPa） Poisson ratio Density (t/mm3) Cross the skeleton aluminum 7000 0.300 2.702E-09 Center-wire carbon structural steel（Q235） 205000 0.290 7.858E-09 Wire alloy steel （65Mn） 210000 0.288 7.820E-09 The simulation model is as shown in the figure.7.
References [1] Tian, S.B., Qiu, L.C., Qin, J.W., and Liu, C.F., Comparison research on the picking robot’s manipulator structure, Journal of Agricultural Mechanization Research, 2007, 3:195-197
[2] Liu, X.D., Ma, L.Z., and Chen, X.X., The pneumatic flexible joint security design for the picking robot’s actuator, Journal of Agricultural Machinery, 2008, 8:105-108 [3] Wang, F.Y., Liu, J.Z. and Li, P.P., Research status and prospect of the picking robot’s terminal actuator, Journal of Agricultural Mechanization Research, 2011, 11:10-14

To understand the cushioning properties of these materials, it is necessary to consider the structural aspects of the various material combinations.
Linoleum, vinyl, rubber and other composite sheet materials are commonly used as sports surfaces and these materials provide a broad range of performance characteristics.
These materials are normally used in conjunction with rubberised or closed cell foam backing materials that attenuate shock.
International Journal of Life Cycle Assessment, 11(3) (2006) 172-182
Medicine & Science in Sports & Exercise. 27(1) (1995) 92-97.

The biocomposite materials have gained interest because of their material properties performance, light weight and low material costs [1].
Frequently, PLA is used for biodegradable packing materials and medical applications.
Materials and Methods Raw materials preparation.
Fontul, Green composites: A review of adequate materials for automotive applications.
Composites Science and Technology, 71 (2011) 653-657

Joining of SiC Ceramic with Ternary Carbide Ti3SiC2 Hongying Dong 1, a, Wenbo Han 2, b and Shujie Li1, c 1 School of Materials Science and Engineering, Beijing University of Aeronautics and Astronautics, Beijing 100083, P.
Han: Journal of Materials Science Vol.33 (1998) p.5007 [3] S.
Wu: International Journal of Refractory Metals & Hard Materials Vol. 18 (2000) p.33 [4] J.
Zhang: Rare Metal Materials and Engineering Vol.32, No.7 (2003) p.542 [5] C.
Watanabe: Journal of Materials Science Letters Vol.18 (1999) p.1595 [8] R.

Experimental Materials.
A concrete-mixer was used to mix the materials and get the concrete.
These dry materials were mixed for about 1 minute before water was added.
Shang Dong Building Materials, Vol. 1 (2006), p. 41-43 [4] Suji D, Natesan S.
Journal of Zhejiang University Science A, Vol. 8 (2007), p. 1101-1109

A rectangular vessel has two contact surfaces with different materials, iron and copper.
The results show that the maximum stress with 112.5 MPa is distributed on the contact surface between the different materials.
Because of the different materials’ expansions, there is stress concentration on the contact surface.
In some special areas, two or more different materials may be used within contact parts for vessel design.
The maximum stress is 112.3 MPa, distributed on the contact surface between the upper plates with different materials.