Fiber Bragg Grating Sensors for Fatigue Monitoring of Composite
(0) Fiber Bragg grating sensor can be used to monitor the mechanical behavior of composite. The internal strain of composite during a constant stress amplitude fatigue testing process was monitored with fiber Bragg gratings sensors. FBG sensors as a fatigue indicator can reveal Youngs modulus decrease of the specimen, which is a direct index of damage. FBG sensors can not only be embedded in composite laminates to detect fatigue damage, but also have excellent durability compared with other sensors such as electric strain gauges. After 1 million cycles, the FBG sensors can still keep good sensibility. FBGs as a fatigue indicator are a novel sensor to monitor, evaluate and give crash alert for the health state of composites during their whole service life.
fiber Bragg grating sensors composites cyclic loading fatigue damage detection
GUO Zhansheng ZHANG Junqian HU Hongjiu GUO Xingming
Shanghai Institute of Applied Mathematics and Mechanics, Shanghai University, Shanghai 200072, P. R. China
国际会议
上海
英文
431-434
2007-10-15（万方平台首次上网日期，不代表论文的发表时间）