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In general, Metal oxide materials were widely used as the functional element which have capabilities to detect various types of gases.
Judith, ZnO–nanostructures, defects, and devices, Materials today 10.5 (2007): 40-48
Maheshwar, Enhanced photocatalytic activity of highly porous ZnO thin films prepared by sol–gel process, Materials chemistry and physics 76.1 (2002): 82-87
[6] U.Ozgur et al., A comprehensive review of ZnO materials and devices, Journal of applied physics 98.4 (2005): 041301-041301
Magnus, Study of the piezoelectric power generation arrays grown by different methods, Advanced Functional Materials, 2010, xx,1-6, DOI: 10.1002/adfm.201001203

Among these three problems, interlaminar delamination is a common failure mode in the composite materials.
In the early stage, carbon and glass fibers were commonly used as the reinforcement materials.
In order to estimate strength and stiffness, the structural materials are subjected to mechanical testing.
Experimental Procedure Materials Two glass fiber fabrics were used as reinforcement.
Sapuan, Experimental characterization of filament wound glass/epoxy and carbon/epoxy materials, ARPN Journal of Engineering and Applied Sciences, VOL. 3, NO. 4, 76-87, 2008

Concern for the environment and reduction in usage costs motivate research of substitute lighter materials.
Research on FSW started with aluminum alloys and has rapidly expanded to other materials [5].
Xil, Properties of High Reinforcement Content Aluminum Matrix Composite for Electronic Packages, Journal of Material Science: Materials in Electronics, Vol. 14, Issue 1, pp. 9 – 12, (2003)
Ma, Friction stir welding and processing, Materials Science and Engineering R, Vol. 50, Issues 1 – 2, pp. 1 – 78, (2005)
Azizieh, Evaluation of microstructure and mechanical properties in friction stir welded A356+15%SiCp cast composite, Materials Letters, Vol. 60, Issue 4, pp. 565 – 568, (2006)

Xie, et al.: Journal of Hazardous Materials, Vol.237 (2012) p.38
Shen: Journal of Alloys and Compounds, Vol.681 (2016) p.191
Chen.: Chinese Journal of Catalysis, Vol.31 (2010) No.1, p.120
Zhang: Advanced Materials Research, Vol. 610 (2013) p.1497
Rani, et al.: Materials Research Bulletin, Vol.74 (2015) p.478

In the presentwork, the ranges of process parameters were selected based on the previous investigations of Davim and Reis (2004) on PEEK materials.
Materials Poly ether ether ketone with the grade name PEEK 450P (powder grade) was purchased from the company Victrex, UK.
Predrying of materials PEEK was dried in a dehumidifier for a period of 10 hours at 1600℃.
It is also clear from Fig. 1 that the wear is minimal at low values of both cutting speed and feed rate for all three composite materials tested.
A comparison of the performance reveals that the tribological aspects of both CF/PEEK and GF/PEEK materials are superior as compared to PEEK.

References [1] O’Sullivan D, Cotterell M: Journal of Materials Processing Technology.Vol 124(2002), p.153
Nakamura: Journal of Materials Processing Technology.Vol143 (2003), p.87
[4] W.S.Lin: Journal of Achievements in Materials and Manufactring Engineering.
[6] M.W.Cook, P.K.Bossom: International Journal of Refractory Metals & Hard Materials.
[10] Malek HABAK, Jean-Lou LEBRUN and Stefan WALDMANN: Materials Science Forum.

The friction coefficient for workpiece-fixture material pair is 0.20.
Cutkosky: Journal of Engineering for Industry Vol. 113 (1991), p. 320 [2] E.C.
DeMeter: Journal of Engineering for Industry Vol. 117 (1995), p. 186 [3] M.Y.
Pelinescu: Journal of Manufacturing Science and Engineering Vol. 125 (2003), p. 325 [4] B.
Nee: IEEE Transactions on Automation Science and Engineering Vol. 1 (2004), p. 121 [6] B.

Fig 2 Suv frame finite element model Frame assembly finite element model is shown in Fig 2,119 parts in total,76,424 nodes,the number of elements 70,489,which 68,616 quadrilateral elements, triple elements 1873,with the proportion of 2.7% triple elements and cell size taking 8mm ~ 12mm. 2.2 Material Properties Frame Material: The use of low-carbon steel frame, to all parts of linear elastic material properties are given in HyperMesh, where the elastic modulus E = 2.07e + 05MPa, material Poisson's ratio λ = 0.3, density ρ = 7.8e -09T / mm3. 3 Modal Analysis 3.1 Frame experimental modal analysis results and comparison The study is structural modal,that is,freedom modal, and some parameters are determined by characteristics of the material properties and the structure itself,not the external load conditions (ie there is no need adding any loads and constraints),and the forced vibration of the structure can be constituted by a linear combination of these basic characteristics under
References: [1]Ying Yang,Guangyao Zhao,Fanliang Meng:A car white body modal analysis and test research, journal of northeastern university (natural science edition).Vol. 29 (2008.7),P1045-1048 [2]Hequan WU,Yong Xin,Xueqin Dong:Finite element molding and stiffness analysis of some off-road vehicle frame.
Journal of agricultural machinery.Vol. 3 (2006),P5-7 [5] Tiecheng Wang,Shumin Cui,Yuan Cheng: The electric car simulation research of dynamic properties [J].
Journal of Harbin institute of technology university.

A study on material performances of cylindrical concrete specimens confined by carbon fiber-reinforced polymer at a strain rate of about 0.1/s has been made in reference[1], while materials may bear higher strain rate under blast and impact loading.
Basalt continuous fiber and its hybrid materials[J].
High-tech fiber and its hybrid materials, 2002, 27(2): 1-5 [3] Lei Su, Zhoudao Lu, Kechun Zhang, et al.
Experimental study on BFRP-reinforced pre-damaged concrete column-beam joints by simulated earthquake[J].Journal of Southeast University (Natural Science Edition),2010,40(3): 559-564 [4] Li'an Shi, Haiyan Ma, Zhidan Rong.
International Journal of Impact Engineering, 2001,25(9): 869-886 [6] Jinguang Teng, Janfen Chen, S.

An Experimental Study on Oil-air Lubrication of Sliding Friction Element Cailin1, a, Jinli Wang2,b, Hongtao Zheng1,c 1 College of Power Science and Engineering, Harbin Engineering University, Harbin 150001, Heilongjiang, P.R.
Zhong: Ultra-high-speed grinding spindle characteristics upon using oil/air mist lubrication, International Journal of Machine Tools & Manufacture, 2002 No.42 [3] K.
Zhong: Ultra-high-speed thermal behavior of a rolling element upon using oil-air mist lubrication, Journal of Materials Processing Technology，127 (2002) 191-198
Ekeredc: Studies on minimum quantity lubrication (MQL) and air cooling at drilling journal of materials processing technology, 200 (2008) 339-346
[6] Chinese National Standard GB124441.-90, Metallic materials-Wear tests MM mode wear test.