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基于FBG传感技术的复合材料T型加筋板低速冲击损伤监测.docx

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基于FBG传感技术的复合材料T型加筋板低速冲击损伤监测 Title:Low-speedImpactDamageMonitoringofCompositeT-shapedStiffenedPanelsBasedonFBGSensingTechnology Abstract: Compositematerialshavegainedsignificantattentioninvariousindustriesduetotheirhighstrength-to-weightratio.However,thesematerialsaresusceptibletodamage,especiallyunderlow-speedimpactevents.Toensurethereliabilityandsafetyofcompositestructures,itiscrucialtodevelopeffectivemonitoringtechniquesfordamagedetectionandassessment.Thispaperpresentsacomprehensivestudyonthelow-speedimpactdamagemonitoringofcompositeT-shapedstiffenedpanelsusingFiberBraggGrating(FBG)sensingtechnology. Introduction: Compositematerials,consistingoffibers(suchascarbonorglass)embeddedinamatrixmaterial,exhibitexcellentpropertiesintermsofstrength,stiffness,andcorrosionresistance.Thesematerialsarewidelyusedinaerospace,automotive,andmarineindustries.However,low-speedimpactevents,suchasaccidentalbumpsorgroundhandling,cancauseinternaldamagethatisnoteasilyvisible.Thishiddendamagecancompromisetheintegrityandperformanceofcompositestructuresovertime. Methodology: TheproposedmethodologyutilizestheFBGsensingtechnologyformonitoringandassessinglow-speedimpactdamageincompositeT-shapedstiffenedpanels.FBGsareminiatureopticalfibersensorsthatmeasurestrainortemperaturechangesbydetectingthespectrumshiftofthereflectedlight.Thesesensorsareembeddedintothecompositestructureduringthemanufacturingprocess,allowingcontinuousmonitoringofthestructure'sintegrity. TheFBGsensorsarestrategicallyplacedalongtheT-shapedstiffenerstocapturestrainvariationsinducedbylow-speedimpactevents.Whenalow-speedimpactoccurs,thesensorrecordsthestraindistributionalongthestiffenersandtransmitsthedatatoanacquisitionsystemforanalysis.Theacquiredstraindataareprocessedtoidentifythelocation,severity,andextentofdamage. ResultsandDiscussion: TheexperimentalstudyinvolvessubjectingcompositeT-shapedstiffenedpanelstovariouslow-speedimpacteventsusingadroptowerapparatus.FBGsensorsembeddedinthepanelscapturestraindataduringimpact.Theacqu