298 0

Relative Measurement of the Acoustic Nonlinearity Parameter using Laser Detection of an Ultrasonic Wave

Title
Relative Measurement of the Acoustic Nonlinearity Parameter using Laser Detection of an Ultrasonic Wave
Author
김종범
Keywords
Acoustic nonlinearity parameter; Aluminum alloys; Copper; Photorefractive interferometer; Relative measurement
Issue Date
2017-10
Publisher
KOREAN SOC PRECISION ENG
Citation
INTERNATIONAL JOURNAL OF PRECISION ENGINEERING AND MANUFACTURING, v. 18, no. 10, page. 1347-1352
Abstract
The relative acoustic nonlinearity parameter beta' is defined by the amplitudes of the fundamental and second-order harmonic components in the detected ultrasonic wave signal, in which a piezoelectric transducer is conventionally used for detection. Although it is not identical to the absolute parameter beta defined by the displacement amplitudes, beta' has been widely used for the relative comparison between the same materials since its ratio is identical to that of the absolute parameter when the detected signal amplitude is proportional to the displacement amplitude. However, beta cannot be replaced by beta' for the comparison between different materials due to the difference of respective acoustic impedance. This study aims to show that a laser detection method using a photorefractive interferometer can be used for the relative comparison of acoustic nonlinearity between different materials because its output is independent of the acoustic impedance. To demonstrate, two similar materials, Al6061-T6 and Al2024-T4, and one different material, copper, were tested. Experimental results showed that the ratio beta (2024) / beta (6061) , measured via the proposed method and the conventional piezoelectric detection method, were in good agreement with the references. However, in the case of beta (Cu) / beta (6061) , only the proposed method showed good agreement with the references.
URI
https://link.springer.com/article/10.1007%2Fs12541-017-0160-yhttps://repository.hanyang.ac.kr/handle/20.500.11754/115901
ISSN
2234-7593; 2005-4602
DOI
10.1007/s12541-017-0160-y
Appears in Collections:
RESEARCH INSTITUTE[S](부설연구소) > RESEARCH INSTITUTE OF INDUSTRIAL SCIENCE(산업과학연구소) > Articles
Files in This Item:
There are no files associated with this item.
Export
RIS (EndNote)
XLS (Excel)
XML


qrcode

Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.

BROWSE