Monitoring of hidden damage in multi-layered aerospace structures using high-frequency guided waves

A. Semoroz; B. Masserey; P. Fromme

doi:10.1117/12.879913

30 March 2011 Monitoring of hidden damage in multi-layered aerospace structures using high-frequency guided waves

A. Semoroz, B. Masserey, P. Fromme

Proceedings Volume 7984, Health Monitoring of Structural and Biological Systems 2011; 798403 (2011) https://doi.org/10.1117/12.879913
Event: SPIE Smart Structures and Materials + Nondestructive Evaluation and Health Monitoring, 2011, San Diego, California, United States

Abstract

Aerospace structures contain multi-layered components connected by fasteners, where fatigue cracks and disbonds or localized lack of sealant can develop due to cyclic loading conditions and stress concentration. High frequency guided waves propagating along such a structure allow for the efficient non-destructive testing of large components, such as aircraft wings. The type of multi-layered model structure investigated in this contribution consists of two aluminium plates adhesively bonded with an epoxy based sealant layer. Using commercially available transducer equipment, specific high frequency guided ultrasonic wave modes that penetrate through the complete thickness of the structure were excited. The wave propagation along the structure was measured experimentally using a laser interferometer. Two types of hidden damage were considered: a localized lack of sealant and small surface defects in the metallic layer facing the sealant. The detection sensitivity using standard pulse-echo measurement equipment has been quantified and the detection of small hidden defects from significant stand-off distances has been shown. Fatigue experiments were carried out and the potential of high frequency guided waves for the monitoring of fatigue crack growth at a fastener hole during cyclic loading was discussed.

Citation Download Citation

A. Semoroz, B. Masserey, and P. Fromme "Monitoring of hidden damage in multi-layered aerospace structures using high-frequency guided waves", Proc. SPIE 7984, Health Monitoring of Structural and Biological Systems 2011, 798403 (30 March 2011); https://doi.org/10.1117/12.879913

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