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| Strain Measurement and Optimal Placement of Fiber Bragg Sensors in Adhesive Layer of Composites |
| ZHANG Yu-yan1,REN Tian-xin1,WEN Yin-tang2,LIU Yong1,Liu Ze-liang3 |
1. Key Lab of Measurement Technology and Instrumentation of Hebei Province, Qinhuangdao, Hebei 066004, China
2. Institute of Defense Science and Technology,Yanshan University, Qinhuangdao, Hebei 066004, China
3. College of Civil Engineering and Mechanics, Yanshan University, Qinhuangdao, Hebei 066004, China |
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Abstract The composite materials for aeronautical application are usually assembled on the substrate surface by means of adhesion agent. It is inevitably to create a variety of defects and damage in the bonding and service process. The interface bonding quality has great influence on material’s preservation performance. In order to evaluate defect and damage in the adhesive layer, a method of optimal placement of fiber Bragg grating (FBG) sensor networks for strain monitoring of composite adhesive layer structures is proposed. Based on the principle of FBG strain sensing, Bragg wavelength shift law of FBG sensor under static loads is studied by simulations and experiments. According to the experimental results, the detection model which matches the actual characteristics of FBG sensor is established. On this basis, the particle swarm optimization algorithm that implements optimal arrangement of FBG sensing network is applied. Experimental show that sensor coverage has improved significantly as the position coordinates of FBG sensor is optimized.
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Received: 30 May 2016
Published: 11 February 2018
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2018, Vol. 39 
