Application of a novel optical fiber sensor to detection of acoustic emissions by various damages in CFRP laminates

被引：55
|
作者：
Wu, Qi [1 ]
Yu, Fengming [1 ]
Okabe, Yoji [1 ]
Kobayashi, Satoshi [2 ]
机构：
[1] Univ Tokyo, Inst Ind Sci, Meguro Ku, Tokyo 1538505, Japan
[2] Tokyo Metropolitan Univ, Dept Mech Engn, Hachioji, Tokyo 1920397, Japan
来源：
SMART MATERIALS AND STRUCTURES | 2015年 / 24卷 / 01期
关键词：
fiber Bragg grating; ultrasonics; acoustic emission; composite materials; damage detection; structural health monitoring; BRAGG GRATING SENSORS; ULTRASONIC-WAVES; MECHANISMS; PROGRESS;
D O I：
10.1088/0964-1726/24/1/015011
中图分类号：
TH7 [仪器、仪表];
学科分类号：
0804 ; 080401 ; 081102 ;
摘要：
In this research, we applied a novel optical fiber sensor, phase-shifted fiber Bragg grating balanced sensor with high sensitivity and broad bandwidth, to acoustic emission (AE) detection in carbon fiber reinforced plastics (CFRPs). AE signals generated in the tensile testing of angle-ply and cross-ply CFRP laminates were both detected by the novel optical fiber sensor and traditional PZT sensors. The cumulative hits detected by both sensors coincided after applying simple data processing to eliminate the noise, and clearly exhibited Kaiser effect and Felicity effect. Typical AE signals detected by both sensors were discussed and were tried to relate to micro CFRP damages observed via microscope. These results demonstrate that this novel optical fiber sensor can reliably detect AE signals from various damages. It has the potential to be used in practical AE detection, as an alternative to the piezoelectric PZT sensor.
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页数：10
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