frp补丁式分层无损检测新方法的实验分析

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1、哈尔滨工业大学工学硕士学位论文AbstractWiththedevelopmentofscienceandtechnology,fiberreinforcedplastic(FRP)laminatecompositematerialsarewidelyusedinavarietyofapplicationsofpracticalengineering.However,theinternaldelaminationordebondingwithothermaterialhaveseriouslyhamperedt

2、hedevelopmentofsuchstructuresandingredients.Therefore,anewdelaminationanddebondingdetectiontechniquebasedonfiberopticinterferometryisproposedinthisthesis.Thedetectionmethodreliesonmeasuringtheintegratedstrainalongalineonthestructuralmemberasafunctionofloadpo

3、sition.Theresultsofdeformationfordamagedspecimensarehigherthanundamagedspecimens.Bycomparingwiththetworesults,thelocationandextentofdelaminationcanbededuced.Thispurposeofthisresearchistoprovethefeasibilityofthismethodandverifythecorrectnessofthetheoryresearc

4、hthroughexperimentalstudy.Thetestingequipmentofthisexperimentismach-zehnderfiberinterferometer.ByapplyingloadonFRPbeamwiththemethodofpoint-to-pointsoastoformphasedifferencebetweenInductionarmandreferencearm.Afterpassthrough3×3couplers,wecangetthedisplacement

5、outputofmarkedpointsonthebeambyusingsoftwaredemodulation,andthenprocessingandanalyzingdatatodeterminethelocationandextentofdelamination.Bycomparingtheresultsofexperimentandtheory,wecanprovidereferencebasisforfuturepracticalengineeringapplication.Thecontentso

6、fthisexperimenthavetwopartsincludingsimplesupportbeamandcontinuoussupportbeam.Thefiberpositionincludingpasteinbeamsurfaceandburiedinbeamneutrallayer,offsetsforclassificationcombinationexperimentaldisplacementoutputcurvechangerule,confirmedThisexperimentisdiv

7、idedintosimplesupportbeamandcontinuoussupportbeamisdividedintotwoparts,fiberpositionpasteinbeamsurfaceandburiedinbeamneutrallayer,offsetsforclassificationcombinationexperimentaldisplacementoutputcurvechangerule,confirmedthefeasibilityofthismethodfornondestru

8、ctivetestingofFRPexperiment.Theresearchcontentandresearchresultsmainlyincludefollowingparts:1)Forthecontinuoussupportedbeam,thefiberisburiedintheneutrallayer.Theoutputdisplacementoftwoedgesofthe