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Acousto-ultrasonics

See also Gravimetric techniqugges Acoustic waves, sensors using, 22 269-270 Acoustooptic (AO) modulators, 14 676 Acousto-ultrasonics, in nondestructive evaluation, 17 425-426 Acquired Immunodeficiency Syndrome (AIDS), 3 135 25 500. See also Anti-HIV drug candidates HIV entries Nevirapine entries sulfonamide exposure in, 23 506 Acquisitions, 15 639 Acrawax C, dental wax, 8 296 9-Acridinecarbonylimidazole, as... [Pg.10]

Tiwari, A.. Lesko, J.. and Henneke, E. G. (1995), Real-time acousto-ultrasonic (AU) nde technique to monitor damage under compressive loads. ASNT Spring Conf.. 20- 24 March 1995, pp. 202-203. [Pg.839]

Acousto-ultrasonics [49] is a guided-wave pitch-catch method. The acousto part in the name reminds one of the reception of guided waves generated by the AE process at a propagating crack. The term ultrasonics infers that this is an active technique in which ultrasonic waves are generated by the transmitter thus this technique is different from the AE technique in that is just a passive technique. [Pg.474]

Figure 16.25 Schematic of acousto-ultrasonics damage imaging in p (a) Experimental setup (b) scatter signal definition [19]. Figure 16.25 Schematic of acousto-ultrasonics damage imaging in p (a) Experimental setup (b) scatter signal definition [19].
Piezo-optical acousto-ultrasonics uses piezo transmitters and FBG sensor receivers. Okabe et al. [65] describe a piezo-optical approach to detect impact delaminations in... [Pg.481]

Figure 16.44 CFRP plate specimen instrumented with hybrid electromagnetic layer HELP and with acousto-ultrasonic SMART layer , (a) Schematic (b) photograph [100]. Figure 16.44 CFRP plate specimen instrumented with hybrid electromagnetic layer HELP and with acousto-ultrasonic SMART layer , (a) Schematic (b) photograph [100].
Figure 16.45 Comparative detection of impacts (II, 12) and bums (Bl, B2, B3, B4) on a CFRP plate instmmented with hybrid electromagnetic layer HELP and with acousto-ultrasonic SMART layer (a) image showing that the HELP method could detect all damages but II whereas the Lamb wave based SMART layer method could detect only II, 12, and B4 damages (b) image showing the detection levels of the electromagnetic HELP method [1(X)]. Figure 16.45 Comparative detection of impacts (II, 12) and bums (Bl, B2, B3, B4) on a CFRP plate instmmented with hybrid electromagnetic layer HELP and with acousto-ultrasonic SMART layer (a) image showing that the HELP method could detect all damages but II whereas the Lamb wave based SMART layer method could detect only II, 12, and B4 damages (b) image showing the detection levels of the electromagnetic HELP method [1(X)].
Duke JC. Acousto-ultrasonics — theory and applications. Plemun Press 1988. Diamanti K, Soutis C. Structural health monitoring techniques for aircraft composite structures. Prog Aerosp Sci 2010 46(8) 342—52. http //dx.doi.0rg/lO.lOl6/j.paerosd. 2010.05.001. [Pg.504]

Lemistre MB, Balageas DL. A hybrid electromagnetic acousto-ultrasonic method for SHM of carbon/epoxy structures. Struct Health Monit Int J 2003 2(2) 153—60. [Pg.507]

Crack density was assessed using non-destructive acousto-ultrasonic (AU) techniques with confirmation by optical microscopy. AU is an... [Pg.497]

Electromagnetic Sonic/ultrasonic Dielectric spectroscopy Resistance measurement Eddy-current testing Tap testing Acoustic emission Acousto-ultrasonics Ultrasonics Acoustic microscopy X-ray and y-ray classified among penetrating radiation... [Pg.5074]

Ultrasonic waves (t5q)ically in the MHz range) can be excited by piezoelectric transducers coupled to the test object. Electromagnetic acoustic transducers (EMAT) (123) cannot be used for ultrasonics of polsrmers and PMC alternatives are discussed in Reference 124. The waves propagate and are scattered and attenuated in the material. The signal can be detected in either reflection or transmission mode (by the transducer emitting the ultrasonic pulse for reflection or by additional transducers at other locations in transmission). Acousto-ultrasonics (AU) (11) records low frequency guided waves (t5q)ically 30-500 kHz) emitted at another location to detect changes in the test objects, eg, in carbon-carbon... [Pg.5079]

Nondestructive Testing of Adhesive Joints. Many commercially available adhesives are based on polymers. NDT of adhesive joints (180) poses challenges because of (2) the small size of possibly deleterious defects (eg, porosity), (2) the thinness of the adhesive layers, and (3) sometimes, the size, shape, and material of the adherends. Acousto-ultrasonics (181) and various types of ultrasonics (182,183) are applicable to adhesive joints. Ultrasonics can be combined with noncontact optical methods (184) and pulsed thermography (185). However, the assessment of the quality or of the quantitative strength of the adhesive bond based on the NDT data often proves difficult. [Pg.5083]

ASTM E1736, Standard Practice for Acousto-Ultrasonic Assessment of Filament-Wound Pressure Vessels, Annual Book of ASTM Standards, Vol. 03.03, American Society for Testing and Materials International, West Conshohocken, Pa., 2004. [Pg.5085]

Fahr, A., Youssef, Y. and Tanary, S., Adhesive bond evaluation using acousto-ultrasonics and pattern recognition analysis. J. Acoust. Emission, 12, 39-44 (1994). [Pg.723]

See other pages where Acousto-ultrasonics is mentioned: [Pg.263]    [Pg.631]    [Pg.474]    [Pg.474]    [Pg.474]    [Pg.476]    [Pg.479]    [Pg.483]    [Pg.497]    [Pg.498]    [Pg.499]    [Pg.337]    [Pg.373]    [Pg.457]    [Pg.29]    [Pg.38]    [Pg.715]   
See also in sourсe #XX -- [ Pg.474 , Pg.483 ]

See also in sourсe #XX -- [ Pg.376 ]



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