Proceedings of SPIE, the International Society for Optical Engineering/Proceedings of SPIE · 1986 · 12 citations · 0 references
Natural SciencesMaterials EngineeringMaterials ScienceMaterials CharacterizationMechanical Behavior Of MaterialsOptical MaterialsComposite MaterialsFiber OpticsMaterial TestingOptical FibersOptical WaveguidesStrain MeasurementNondestructive AnalysisNondestructive EvaluationNondestructive TestingNondestructive Testing Of MaterialsOptical Fiber Strain SensingOptical Fiber WaveguidesOptical Strain MeasurementStrain Field Measurement
Optical fiber waveguide imbedded between plys of graphite-epoxy composite materials is used to determine the dynamic three-dimensional strain within the materials by OTDR and subsequent signal processing. This paper describes methods used for imbedding optical fiber within composites, results of the fiber measurements of internal strain location, and inherent limitations on the spatial, temporal, and strain amplitude domain resolutions of the technique.