Structural health monitoring of CFRP airframe structures using fiber-optic-based strain mapping

摘要

This paper proposes structural health monitoring technology based on the strain mapping of composite airframestructures through their life cycles by FBG sensors. We carried out operational load tests of small-sized mockupspecimens of CFRP pressure bulkhead and measured the strain by FBG sensors. In addition, we confirmed strain changedue to stiffener debondings. Moreover, debonding detectability of FBG sensors were investigated through the strainmonitoring test of CFRP skin-stiffener panel specimens. As a result, the strain distribution varied with damageconfigurations. Moreover, the change in strain distribution measured by FBG sensors agrees well with numericalsimulation. These results demonstrate that FBG sensors can detect stiffener debondings with the dimension of 5mm incomposite airframe structures.© (2012) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.