دانلود رایگان مقاله لاتین تاثیر بر مواد کامپوزیت توسط تصویربرداری تراهرتز از سایت الزویر
عنوان فارسی مقاله:
تشخیص آسیب تاثیر بر مواد کامپوزیت توسط تصویربرداری تراهرتز
عنوان انگلیسی مقاله:
Impact damages detection on composite materials by THz imaging
سال انتشار : 2016
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مقدمه انگلیسی مقاله:
1. Introduction
The field of THz waves lies in the electromagnetic spectrum in the frequency range between 300 GHz and 10 THz, or in wavelengths from 30 μm to 1 mm. On the one hand, the energy of THz photons is very low, below 40 meV. On the other hand, most non-metallic and non-polar media are “transparent” to THz waves. These two properties make THz waves a potential candidate for Non-Destructive Testing in a variety of fields, such as art conservation science [1], plastic weld joints [2], quality control on chocolate bars [3] or the absorption of water into polyamide and wood plastic composite [4]. A composite material is a combination of two (or more) materials working together that give the composite its unique properties. This denomination is applied to many materials and many sectors: glass, aramide or carbon fibre reinforced composites used in the aeronautics and automotive industries or sports equipment, and wood composite in furniture manufacturing, among others. NDT using THz waves can be an alternative when “traditional” methods are not very efficient (composite made from soft epoxy resin, for instance) or to improve spatial resolution. In a simplified manner, there are two kinds of THz radiation technology: pulsed and Continuous Wave (CW). In pulsed systems, a femtosecond Ti:Sa or mode-locked fiber laser (duration ∼100 fs) produces an optical-pulse train sent on a THz emitter (photoconductive antenna or nonlinear crystal) to form electromagnetic pulses. After being transmitted through or reflected by the sample, the resulting waveform is coherently detected in time-domain using a delay line and Fourier Transformed to be analyzed in the frequency domain, providing a broad spectrum that covers typically the frequency range [0.1–3] THz [5].
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کلمات کلیدی:
Impact damages detection on composite materials by THz imaging https://www.researchgate.net/.../309197797_Impact_damages_detection_on_composite_... This paper presents a Non-Destructive Testing (NDT) method based on the penetration properties of terahertz (THz) waves. A CW raster-scanning THz imaging ... Non-destructive testing of composite materials using terahertz time ... proceedings.spiedigitallibrary.org/proceeding.aspx?articleid=2520208 by EV Yakovlev - 2016 - Related articles Apr 29, 2016 - Berry E. et al., "Do in vivo terahertz imaging systems comply with safety .... imager for composite materials inspection," Optical Engineering, ... [PDF]Aeronautics composite material inspection with a terahertz ... - HAL-Inria https://hal.inria.fr/docs/00/94/29/71/PDF/OspaldOE2014_53_3_031208-HAL.pdf by F Ospald - Cited by 42 - Related articles Feb 21, 2014 - Keywords: composite materials; terahertz imaging; non-destructive testing; carbon fiber reinforced plastic; glass fiber reinforced plas-. [PDF]Non-Destructive Evaluation of Composite Materials Using Terahertz ... dtic.mil/cgi-bin/GetTRDoc?AD=ADA491327&Location=U2&doc=GetTRDoc... by CUTT DOMAIN - Cited by 15 - Related articles Dec 10, 2008 - COMPOSITES USING TERAHERTZ TIME DOMAIN ... transmission and reflection imaging using amplitude and phase techniques. The depth of. image and signal processing algorithms for thz imaging of composite ... aip.scitation.org/doi/abs/10.1063/1.3362472 by P Lopato - 2010 - Cited by 14 - Related articles Terahertz time domain pulsed NDT inspection of composite materials creates opportunity to achieve signals allowing to identify various defects types very ... Terahertz propagation properties of composite materials and ... https://www.osapublishing.org/viewmedia.cfm?uri=ISUPTW-2016-IT5A.3&seq=0 by T Chang - 2016 - Related articles For non-polar materials such as fiber composites, THz radiation has no known ... In terms of imaging, THz wave feature high spatial resolution compared. Testing of composite materials using advanced NDT methods www.emeraldinsight.com/doi/pdfplus/10.1108/03321641111133172 by L Klinkenbusch - 2011 - Cited by 9 - Related articles case of various composite materials and to propose a new defect detection algorithm. ... terahertz imaging results of composite anticorrosion coating, glass- and ...
