Ultrasonic detection of aircraft composite structures by using a high-sensitivity and high-reliability TPU sensor

Song Wang

doi:10.1117/12.3005782

24 November 2023 Ultrasonic detection of aircraft composite structures by using a high-sensitivity and high-reliability TPU sensor

Song Wang

Author Affiliations +

Proceedings Volume 12935, Fourteenth International Conference on Information Optics and Photonics (CIOP 2023); 1293519 (2023) https://doi.org/10.1117/12.3005782
Event: Fourteenth International Conference on Information Optics and Photonics (CIOP 2023), 2023, Xi’an, China

Abstract

The composite materials are widely used in the aerospace field due to their satisfying properties. However, the structural damage always appears at the manufacturing stage, and various defects are also produced during the service process. Ultrasonic detection is the most popular approach for Non-Destructive Testing, but challenges still exist in composite materials for their large acoustic attenuation and mechanical physical anisotropy. Herein, as an alternative to the conventional electric transducers, we propose a new optical ultrasonic sensor for the defect detection of aircraft composite structures. The sensor utilizes a ceramic ferrule to construct a low-fitness in-line interferometer. Thermoplastic polyurethane elastomer rubber (TPU) is employed as the sensitive film and a single mode fiber grating is involved into the optical interferometer to improve its visibility. The sensor response and stability are characterized in experiments, and the artificial defects in a honeycomb-like plate are identified in time/frequency domains. Owing to the high elasticity and good durability of TPU, the proposed sensor possesses excellent performance of high sensitivity and reliability for detecting weak echoes in harsh conditions.

(2023) Published by SPIE. Downloading of the abstract is permitted for personal use only.

Citation Download Citation

Song Wang "Ultrasonic detection of aircraft composite structures by using a high-sensitivity and high-reliability TPU sensor", Proc. SPIE 12935, Fourteenth International Conference on Information Optics and Photonics (CIOP 2023), 1293519 (24 November 2023); https://doi.org/10.1117/12.3005782

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