CAMX 2015 preview: Luna Innovations

Luna Innovations (Roanoke, VA, US) will present a paper CAMX on Thursday, Oct. 29 at 8:00 a.m. titled, “In-Situ SHM of Composite-Overwrapped Pressure Vessels.”

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Luna Innovations (Roanoke, VA, US) will present a paper CAMX on Thursday, Oct. 29 at 8:00 a.m. titled, “In-Situ SHM of Composite-Overwrapped Pressure Vessels.” The paper demonstrates how Luna’s High-Definition Fiber Optic Sensing (HD-FOS) system is used to monitor distributed strain in composite-overwrapped pressure vessels (COPVs) throughout the manufacturing process, subsequent qualification testing and periodically throughout the service life of the pressure vessel. Luna’s ODiSI product platform uses HD-FOS technology to turn ordinary unaltered single-mode fiber optic cable into advanced strain or temperature sensors. Fiber optic cables, when illuminated, have the equivalent of an optical finger print, and this finger print will change, in a predictable and repeatable way, in response to changes in strain and temperature. The fiber sensor, when coupled with Luna’s advanced HD-FOS technology will replicate a virtually continuous line of strain gages or temperature sensors with just milimeter spacing between sensing points. At 150 microns in diamete,r the fiber sensor also has the capability to be embedded within structures under test.  For strain, this high-density sensing is suitable for measuring the non-linearity and high gradients associated with composite structures, as well as for finite element analysis (FEA) model validation of designs with complex geometries or using new advanced materials.