Detection of Impact Damage and Displacement Behavior of CFRP by using Optical Fiber Sensor

This paper presents an investigation into the damage monitoring and displacement behavior of carbon fiber reinforced plastic (CFRP) laminates at low velocity impact tests. Instrumented drop weight impact tests are conducted for CFRP laminates. Optical fiber sensor is able to detect elastic wave from 0.1Hz to several MHz. For damage monitoring and displacement behavior sensing, the optical fiber sensor was bonded on the CFRP. Optical fiber sensor is able to detect damage and displacement behavior at the same time. Moreover, it was found that optical fiber sensor signal correspond to the impact damage detected by NDI test (C-Scan) and cross-section observation.