RD OF IMPACT DAMAGE DETECTION SYSTEM FOR AIRFRAME STRUCTURES USING OPTICAL FIBER SENSORS

摘要

The basic technologies of a damage detection system for composites were developed and demonstrated using a composite structure with embedded small-diameter optical fiber sensors by Authors in FY2002 [1], [2]. In current R&D, the damage detection system consisting of a composite installed optical fiber sensors and a measurement monitor system is developed for the application to a practical airframe. The system evaluation by using composite substructures is planned to proceed towards product. As the foremost tasks for the application, the durability of the damage detection system should be verified. In this study, to investigate the durability of embedded optical fibers and composites, fatigue test is conducted using CFRP coupon specimens with embedded small-diameter optical fibers.