Evaluation of Defect in Compostie Using Acousto-Ultrasonic Technique

Abstract:

Article Preview

This paper is focused on the capability of the Acousto-Ultrasonic (AU) technique and the non-contact technique to provide diagnostic information useful to detect defect in composite. An acousto-ultrasonics (AU) is to simulate stress wave that resemble acoustic emission waves but without disrupting the material. One launched inside the material sample, the wave are modified by stochastic processes like those that affect spontaneous acoustic emissions from internal sources during stressing, deformation, etc. Moreover, acousto-uloasonic waves are launched periodically at predetermined times and with predetermined reparation rates. A fiber reinforced composite materials should be inspected in fabrication process in order to enhance quality by prevent defects such as delamination and void. In conventional ultrasonic technique for the evaluation of FRP, the transducer should be contacted on FRP. Therefore, in this study, advanced conventional contacting method (AU) and non-contact technique using air-coupled transducer can make contact and noncontacting ultrasonic technique available in evaluation of FRP. This paper demonstrates first results using an acousto-ultrasonic technique.

Info:

Periodical:

Key Engineering Materials (Volumes 326-328)

Edited by:

Soon-Bok Lee and Yun-Jae Kim

Pages:

1267-1270

DOI:

10.4028/www.scientific.net/KEM.326-328.1267

Citation:

M. R. Lee and J. H. Lee, "Evaluation of Defect in Compostie Using Acousto-Ultrasonic Technique", Key Engineering Materials, Vols. 326-328, pp. 1267-1270, 2006

Online since:

December 2006

Export:

Price:

$35.00

[1] S.M. Moon and K. L. Jerin, in: Acousto-Ultrasonics, edited by C. John Polytechnic Institute and State Univ. in Backsburg/Plenum Publishing, New York, NY (1988).

[2] W.S. Park and J.H. Lee: Laser-generated Ultrasonic Technique for Inspecting Delamination in CFRP (Conference on Advanced Nondestructive Evaluation, Korea 2005).

[3] S.W. Choi and J.H. Lee: Nondestructive Evaluation of Internal Defects for Composite Materials by Using Shearography (Key Engineering Materials, Vols. 270-273, pp.781-786. (2004).

DOI: 10.4028/www.scientific.net/kem.270-273.781

[4] R. Talreja, in: Acousto-Ultrasonics, edited by C. John Polytechnic Institute and State Univ. in Backsburg/Plenum Publishing, New York, NY (1988).

In order to see related information, you need to Login.