Damage assessment of composite laminate by using fiber optic AE sensor based on fused-tapered coupler

Jinsong Leng; Juncai Hao

doi:10.1117/12.715532

6 April 2007 Damage assessment of composite laminate by using fiber optic AE sensor based on fused-tapered coupler

Jinsong Leng, Juncai Hao

Proceedings Volume 6531, Nondestructive Characterization for Composite Materials, Aerospace Engineering, Civil Infrastructure, and Homeland Security 2007; 653102 (2007) https://doi.org/10.1117/12.715532
Event: SPIE Smart Structures and Materials + Nondestructive Evaluation and Health Monitoring, 2007, San Diego, California, United States

Abstract

Damage inspection is very important for safe and reliable use of composite materials. Some non-destructive evaluation methods have been used to monitor the damage of composite. It is necessary to develop a novel fiber optic sensor and use it to monitor the damage of composite materials. This paper proposes to make an optic fiber acoustic emission (AE) sensor base on fused-taper fiber optic coupler with low price and high sensitivity, and to monitor the damage of composite materials. To prove the sensitivity of this sensor, Pencil-break test was done. To investigate the failure mode of composite materials, tensile experiment of composite laminate was also carried out. Experiment got lots of acoustic emission data under different tensile stage, Relationship of AE waveform and failure mode was established. It was found that fiber optic AE sensor with high sensitivity was successfully developed, and failure mode of composite materials was identified. This kind of research encourages the belief that the sensor will be used to structural health monitoring of larger composite structures.

Citation Download Citation

Jinsong Leng and Juncai Hao "Damage assessment of composite laminate by using fiber optic AE sensor based on fused-tapered coupler", Proc. SPIE 6531, Nondestructive Characterization for Composite Materials, Aerospace Engineering, Civil Infrastructure, and Homeland Security 2007, 653102 (6 April 2007); https://doi.org/10.1117/12.715532

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