Novel zooming method for delamination monitoring of CFRP laminates using electrical potential change

Masahito Ueda; Akira Todoroki; Yoshinobu Shimamura; Hideo Kobayashi

doi:10.1117/12.539091

20 July 2004 Novel zooming method for delamination monitoring of CFRP laminates using electrical potential change

Masahito Ueda, Akira Todoroki, Yoshinobu Shimamura, Hideo Kobayashi

Proceedings Volume 5393, Nondestructive Evaluation and Health Monitoring of Aerospace Materials and Composites III; (2004) https://doi.org/10.1117/12.539091
Event: NDE for Health Monitoring and Diagnostics, 2004, San Diego, CA, United States

Abstract

Monitoring of delamination is indispensable for CFRP structures. It is, however, very difficult to detect a delamination visually. This demands a new structural health monitoring method. For aerospace structures, it is required to monitor a delamination before flight, and this means the monitoring system must detect the delamination without loading. In authors' previous studies, the delamination can be monitored with the electric resistance change method. The method provided excellent performance of estimations. The method, however, requires complicated electric circuits and uses a two-probe method: two-prove method includes effects of the electric resistance change at the electrodes. To resolve these problems, an electrical potential method is employed here. In the previous paper, the electrical potential method showed poor performance of estimations for delamination cracks located near the center of the specimen. The practical zigzag crack has large effect on the performance of estimation when the delamination locates at the center segment of the specimen. This problem is overcome by means of a two-stage monitoring method. The new method shows excellent performance of estimations on the basis of FEM analyses. In this paper, experiments are conducted to identify the delamination using this method. The applicability of this method is examined using the experimental data.

Citation Download Citation

Masahito Ueda, Akira Todoroki, Yoshinobu Shimamura, and Hideo Kobayashi "Novel zooming method for delamination monitoring of CFRP laminates using electrical potential change", Proc. SPIE 5393, Nondestructive Evaluation and Health Monitoring of Aerospace Materials and Composites III, (20 July 2004); https://doi.org/10.1117/12.539091

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available