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Optical fibre damage detection for an aircraft composite leading edge
Affiliation:1. Institute of Lightwave Technology, Beijing Jiaotong University, Key Laboratory of All Optical Network and Advanced Telecommunication Network of EMC, Beijing, China;2. Institute of Engineering Mechanics, Beijing Jiaotong University, Beijing 100044, China;1. Department of Mechanical Engineering, Pukyong National University, 365 Sinsun-Ro, Nam-Gu, Busan 608-739, Republic of Korea;2. Deparment of Mechanical and System Design Engineering, Hongik University, 94 Wausan-ro, Mapo-Gu, Seoul 121-791, Republic of Korea;1. Department of System Dynamics, Korea Institute of Machinery & Materials, 156 Gajeongbuk-Ro, Yuseong-Gu, Daejeon 34103, Republic of Korea;2. School of Mechanical and Automotive Engineering, Catholic University of Daegu, 13-13 Hayang-Ro, Hayang-Eup, Gyeongsan-Si, Gyeongsangbuk-Do 38430, Republic of Korea;3. School of Mechanical and Aerospace Engineering, Seoul National University, 599 Gwanak-Ro, Gwanak-Gu, Seoul 08826, Republic of Korea;1. The State Key Laboratory of Bioelectronics, Jiangsu Key Lab of Remote Measurement and Control, School of Instrument Science and Engineering, Southeast University, China;2. Department of Mechanical Engineering, Carnegie Mellon University, USA
Abstract:Recent developments towards the development of a fibre optic damage detection system for composite materials are described. Results of experiments designed to measure the influence of optical fibre orientation and depth on the sensitivity of the system are reported and optimal configurations have been determined for both. A surface treatment for controlling the damage sensitivity of the optical fibres to the point where they can detect barely visible damage is described. A study into the failure mechanisms of embedded optical fibres is also reported. The technique has been demonstrated to be capable of detecting both impact and quasi-statically induced damage and can be used to map the growth of a region of damage with increasing load.
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