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Sawdust materials are important for several reasons.
New composite materials were experimented with for determining their mechanical properties by substituting recycled materials in different dosages for fine aggregates.
Materials and Methods Fine Aggregate (Sand).
Fig. 4 shows the experimental program with experimental materials.
The bond between lightweight materials and concrete mixtures decreased sharply as the volume of sawdust material increased. 5.

This type of impact test helps to understand the behaviour of materials when they are subjected to impact loads.
International Journal of Mechanical and Material Engineering, (2010), Vol. 5 (2), 260-267
“Energy Absorption of Structures and Materials”.
“Strength of Materials”.
Materials and Design 31, (2010), 4553–4560.

Chen: Chemistry of Materials Vol. 15 (2003), p. 2917 [9] F.
Richards: Journal of Biomedical Materials Research Part A Vol. 75A (2005), p. 541 [15] S.
Nealey: Journal of Vacuum Science & Technology B Vol. 21 (2003), p. 683 [25] P.
Wilkinson: Journal of Cell Science Vol. 99 (1991), p. 73 [26] S.
Affrossman: Advanced Materials Vol. 16 (2004), p. 1857 [37] N.

Influence of Voltage on the Biological Performance of Micro-Arc Oxide Films Based on TC4 Titanium Alloy Ji-kang YAN1,2, Yuan TENG1,2, Er-xin NI1,2, Yun-feng WU2, Yan-hua SUN2, Shu-ming FANG2, Zhe SHI3 and Gang YANG2 1 Faculty of Materials Science and Engineering, Kunming University of Science and Technology, Kunming 650093, P.R.
Acknowledgements This research was supported by the NSFC(Natural Science Foundation of China(51362017)), Major science and technology projects in Yunnan province (NO. 2012ZE008),Youth fund projects in Yunnan province (Y0120140016), Synergy innovation fund by advanced materials rare metals collaborative innovation center(14051708).
References [1] Z.D Liu, R .Luo, X.L Cheng, Chinese Journal of Materials Research.27 (2013) 355-359
Journal of Aeronautical Materials. 45 (2012) 42-46
Surface Science. 601 (2007) 518–527

According to detect a variety of pavement materials and dielectric constant velocity, you can calculate the thickness of the surface layer of various structures to give moisture, damage location and other information. 3.
Journal of Materials Science, 2002, Vol. 37, pp. 557-566
Journal of South China University of Technology (Nature Science Edition), 2008, 36(2):41-47
The progress and application of digital speckle correlation method[J], Journal of Experimental Mechanics, 2006, 21(6): 689-702
Compressive Test of Closed-cell Aluminum Foam Based on Digital Image Correlation Method[J], JOURNAL OF EXPERIMENTAL MECHANICS, 2008,23(2):162-168.

C.[4]and others used mortar materials do uniaxial compression test of rock masses with joints.
A physical model study of jointed rock mass strength under uniaxial compressive loading [J].International Journal of Rock Mechanics and Mining Sciences, Volume 34, Issues 3–4, April–June 1997, No. 165
Chinese Journal of Rock Mechanics and Engineering. 2011, 30(4): 783-789
[J] International Journal of Rock Mechanics and Mining Sciences & Geomechanics Abstracts.
Chinese Journal of Rock Mechanics and Engineering, 2008, (10): 2118-2123.

These materials have very good hot mechanical properties [25].
Progress in Materials Science, 53(6) (2008), 980–1023
Jatti, Friction Stir Welding of Polymer, international journal of advance research in science engineering, Vol n 6, Issue n 09, 2017
Materials & Design, 108(2016), 114–125
Journal of Aeronautical Materials 33(5) (2013), 36-40

However, materials in micro size exhibited distinguishing mechanical properties from macroscopic size, therefore, traditional test methods including indentation, tension and shear tests would not apply to this case.
Journal of Materials Research, 1992, 7(6): 1564-1583
In Defect Properties and Processing of High-Technology Nonmetallic Materials [M], Pittsburgh: Materials Research Society, 1984: 515-523
Journal of Materials Research, 1992,7(2):450–73
Journal of Polymer Science, 2012, 50:1597-1611.

Kumaran1,d 1Advanced Welding Processes Laboratory, Department of Metallurgical and Materials Engineering, National Institute of Technology, Tiruchirappalli, Tamil Nadu, 620015, India.
Yurzhenko, Structure and properties of the welded joints of single-type polyethylenes formed under the action of constant magnetic fields, Materials Science, 53 (2017) 186-193
Bozkurt, The optimization of friction stir welding process parameters to achieve maximum tensile strength in polyethylene sheets, Materials and Design, 35 (2012) 440–5
Czigany, Effect of welding parameters on the heat affected zone and the mechanical properties of friction stir welded poly(ethylene-terephthalate-glycol), Journal of Applied Polymer Science, 125 (2012) 2231-2238
Shishavan and Richard Eungkee Lee, Mechanical properties of friction-stir-welded polyamide sheets, International Journal of Mechanical and Materials Engineering, 10 (2015) 1 - 8

But for the medium hardness uniform materials, its contact fatigue property has seldom researched at home and abroad.
Some technical work was carried out for selecting reasonable materials for the gear with medium hardness.
Experiment Materials and Method Experiment Steel, Heat Treatment Process and Microstructure.
The shearing resistant stress of the materials has certain relationship with the contact fatigue property.
Devanathan: Wear, Vol. 156(1992), p. 121 [2] Shu Delin: Mechanical Properties of Materials.