Download PDF by Qi Luo: Aerospace and Mechanical Engineering

By Qi Luo

ISBN-10: 3038351180

ISBN-13: 9783038351184

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However, that increase coincided with reduction in medium frequency absorption. This increase is due to loss of acoustical wave energy of transmitted wave in the presence of sample-air passage and of reflected wave from rigid backing, through air-sample passage in the propagation of acoustical wave[14]. Applied Mechanics and Materials Vol. 565 29 Fig. 6 Sound absorption of the uncovered sample (UC), self-facing natural date palm fibers and PP aluminum facing using Fig. 7 Sound absorption (Alpha) of the self-facing panel for different air gap thicknesses ( 10 mm, 20 mm and 30 mm) Conclusions Sound absorption of self-facing natural date palm fibers has been investigated.

96 (2005), p. 79. [3] A. Kriker,G. Debicki, A. M. Khenfer, M. Chabannet: Cement & Concrete Composites Vol. 27 (2005),p. 554. B. Thayer: Journal of Hazardous Materials: Vol. 161 (2009), p. 608. [5] F. Al-Sulaiman:Energy Conversion and ManagementVol. 43 (2002), p. 2267. 38 (2003), p. 435. -S. -J. Kim:Bioresource Technology Vol. 86 (2003), p. 117. Teekasap: Building and Environment Vol. 39 (2004), p. 59. [9] T. Tsujiuchi, A. A. P. De Wilde, volume 4 of High performance structures and composites,Witpress(2002), p.

8) Applied Mechanics and Materials Vol. 565 41 Fig. 8 Spectrum of vibratory signal at the third pass The fellow-up of the harmonic at the frequency 4 KHz makes possible to predict the tool life as Fig. 9 shows it; the inflection point which represents the acceleration phase of wear can be detected by a notable change on spectral energy of this frequency as shown in the spectrum plot at the 56th pass number, which characterizes the beginning of the acceleration stage of tool wear. The graph of Fig.

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Aerospace and Mechanical Engineering by Qi Luo


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