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acousto-ultrasonics

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Series: ASM Handbook
Volume: 21
Publisher: ASM International
Published: 01 January 2001
DOI: 10.31399/asm.hb.v21.a0003436
EISBN: 978-1-62708-195-5
... Abstract This article introduces the principal methodologies and some technologies that are being applied for nondestructive evaluation of composite materials. These include ultrasonic testing (UT), air-coupled UT, laser UT, ultrasonic spectroscopy, leaky lamb wave method, acousto-ultrasonics...
Series: ASM Handbook
Volume: 21
Publisher: ASM International
Published: 01 January 2001
DOI: 10.31399/asm.hb.v21.a0003463
EISBN: 978-1-62708-195-5
... because the greater the length integrated, the more inhomogeneities in the damage state can be averaged out. Fig. 10 Change in acousto-ultrasonic stress wave parameter during fatigue test of graphite-epoxy specimen Radiography is an NDT technique that can provide extensive and detailed...
Series: ASM Handbook
Volume: 17
Publisher: ASM International
Published: 01 August 2018
DOI: 10.31399/asm.hb.v17.a0006478
EISBN: 978-1-62708-190-0
... article surface allows inducing various Lamb wave modes and can provide qualitative information. This method is widely known as the acousto-ultrasonics (see the section “ Acousto-Ultrasonics ” in this article). Alternatively, one can use immersion coupling and induce Lamb waves to obtain quantitative data...
Series: ASM Handbook
Volume: 17
Publisher: ASM International
Published: 01 August 2018
DOI: 10.31399/asm.hb.v17.a0006460
EISBN: 978-1-62708-190-0
... ( Ref 26 ). Such a moving grating can be obtained by making two beams issued from the same generation laser intersect at the surface of the sample, one being frequency shifted by an offset f (for example, by sending it through an acousto-optic shifter). By reference to Fig. 5 , the enhancement...