FBG sensing detection of composite hidden multi-delamination

Shengming Cui; Jiyun Lu; Yiyao Wang; Zifan He

doi:10.1117/12.2653240

9 January 2023 FBG sensing detection of composite hidden multi-delamination

Shengming Cui, Jiyun Lu, Yiyao Wang, Zifan He

Proceedings Volume 12507, Advanced Optical Manufacturing Technologies and Applications 2022; and 2nd International Forum of Young Scientists on Advanced Optical Manufacturing (AOMTA and YSAOM 2022); 1250706 (2023) https://doi.org/10.1117/12.2653240
Event: 2nd International Forum of Young Scientists on Advanced Optical Manufacturing (AOMTA and YSAOM 2022), 2022, Changchun, China

Abstract

Multi-damage detection for composite materials has been a hot issue in the field of structural health monitoring. In order to further study the problem by means of FBG sensors, an optical fiber sensing system has been built to enable the detection of delamination damage in composite laminates. The system includes sensing strain, data processing and damage localization algorithms. A model of a carbon fiber/epoxy laminate is created using the finite element analysis. The stress cloud chart of the laminate when subjected to a hammering load is calculated and analyzed and it is concluded that stress waves propagate along 45 degree direction of carbon fiber and stress is concentrated at the delamination and then decreased obviously. The Fourier transform and wavelet transform are used to analyse the key level signal of the wavelet transform and to determine the area of delamination damage, and the experiment is checked by ultrasonic C-scan. The experimental results show that by building a network of fibre Bragg gratings(FBG) sensing systems, the hammering test can detect multi-delamination damages of different sizes in composite laminates, the smallest of which is 10mm in diameter, providing a basis for subsequent composite structures health monitoring in complex environments.

Citation Download Citation

Shengming Cui, Jiyun Lu, Yiyao Wang, and Zifan He "FBG sensing detection of composite hidden multi-delamination", Proc. SPIE 12507, Advanced Optical Manufacturing Technologies and Applications 2022; and 2nd International Forum of Young Scientists on Advanced Optical Manufacturing (AOMTA and YSAOM 2022), 1250706 (9 January 2023); https://doi.org/10.1117/12.2653240

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