基于光弹性贴片法材料表面应变场测量实验分析

《基于光弹性贴片法材料表面应变场测量实验分析》由会员上传分享，免费在线阅读，更多相关内容在行业资料-天天文库。

1、ABSTRACTElectricalmeasurement、Ⅳitllelectricresistancestraingaugeisoneofcommonlyusedmeasurememmethodsforsurfacestrain(stress)．Themeasudngmethodbasedonstrain-resistanceeffecthasadvantagesofhighsensitivityandsmallerror,however,itisakindofpoilltmeasurementmethodcallonlymeasureverysmall

2、areasofaveragestrainforthecomponentsurfaceandcallnotillustratethestrainfielddistributionofthemeasuredareas．Photoelasticcoatingmethodusingstrain-opticalinterferenceeffectofphotosensitivematerialtomeasurestrain(stress)ofcomponentsurface，itisakindofsurfacestrainfieldmeasurementmethodd

3、evelopedbasedonthetraditionalphotoelasticmeasuringtechnique．Thephotoelasticcoatingmethodcanshowalargeareastrain(stress)fieldimageofcomponentsurface．Itcallshowalargeareastrain(stress)distributionandnotjusttheaveragestrainofasmallareavalue．Therefore，thestudyonthemeasurementofstrainin

4、photoelasticeffectCanprovideavisualpattemmethodforregionalstrainfieldmeasurementofcomponentsurface．Themeasurementresultsofresistancestraingaugemethodisnoteasytointerpretdistributionofthesurfacestrainfield．Tosolvethisproblem，thearticlecardedoutthematerialsurfacestrainmeasurementwith

5、photoelasticcoatings．Theresearchworkofphotoelasticproduction,materialcalibration，fringeimageprocessingandSOonarecarriedout．ToCalTyoutfurtherresearchwork,photoelasticcoatingsareappliedtometallicandconcretestrainfieldmeasurement．Themainresearchcontentsareasfolllows：(1)Productionproce

6、ssofphotoelasticcomingarestudied．Intheproductionprocessofphotoelasticcoating，someeffectivemeasuresareadoptedtosolveproplemsofthepatchinsidebubbles，uneventhickness，thesurfaceisnotsmoothetc．Thephotoelasticcoatingmaterialfringevaluewascalibratedwithuniformbeam，andstressenhancementeffe

7、ctonthecalibrationresultsofthecoatingsWasrevised．(2)Throughtheloadingexperimentdofseveraltypicalphotoelasticshapes，themeaSurementandanalysismethodsofisochromatic，isocline，separationofprincipalstressaremastered．(3)Tomakethephotoelasticfringeclarityandtobeunderstoodbetter,theimagepro

8、cessingtechniqueofphotoela