单向纤维复合材料的低频阻尼性能.pdf

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1、第27卷第8期传感技术学报Vo1．27No．82014年8月cHINESEJOURNALOFSENSORSANDAC_rUATORSAug．2014Lower—FrequencyDampingPropertiesofFiberReinforcedCompositeL／Jianzhi，SUNBaochen(KeyLaboratoryofStructuralHealthMonitoringandControl，ShifiazhuangTiedaoUniversity，Shijiazhuang050043，China)Abstract：Tofurtherexplorethelow—f

2、requencypropertyofcompositeFiberreinforcedvinylestercompositesandfi．，berreinforcedepoxycompositesweremanufacturedbythepuhrusionandthetemperaturespectrumandfrequencyspectrumoflossfactorweretestedbythedynamicmechanicalanalysis(DMA)．Thedampingpropertiesanddampingmechanismofthecompositewereinves

3、tigatedatdifferenttemperaturesandfrequencies．Theresuhindicatesthatthediameterofthefiberiserucialtothedamping．ThelOSSfactorofthecompositesisinereasingwiththefrequencyfrom0．1Hzto2Hzanddecreasingwithtemperatureintherangefrom一20c(=to60℃．The1ossfactorofthecarbonfibercompositeishigherthanthatofthe

4、glassfiberf_0rthesamematrix．Thelossfactorofthevinylestercompositeishigherthanthatoftheepoxycompositeforthesamefiber．Keywords：composites；lossfactor；damping；lowfrequency；temperature；hybridfiberEEACC：7230doi：10．3969／j．issn．1004—1699．2014．08．004单向纤维复合材料的低频阻尼性能木李剑芝孙宝臣(河北省大型结构健康诊断与控制实验室，石家庄050043)

5、摘要：为了进一步探索纤维增强复合材料的阻尼性能，本文通过拉挤工艺制作了聚乙烯基纤维增强复合材料和环氧基纤维增强复合材料，通过动态力学分析仪研究了纤维增强复合的频率和温度阻尼性能。结果表明：增强纤维的直径对阻尼性能很重要。2种纤维复合材料阻尼损耗因子随着温度的升高而下降(一20℃一60oC)；随着频率的增加而增加(0．1Hz～2Hz)。碳纤维复合材料的阻尼性能优于玻璃纤维复合材料；聚乙烯基复合材料的阻尼性能优于环氧基复合材料的阻尼性能。关键词：复合材料；损耗因子；阻尼；低频；温度；混杂纤维中图分类号：TN253文献标识码：A文章编号：1004-1699(2014)08-1022—

6、05Inrecentyears，moreandmorecompositeshave(CFRP)cableswereinitiallymostinvestigatedtobeenusedinvariousareas，suchascommercialaero．replacesteelcables[3。．Totaketheadvantageofthespace，auto，marine，apace，civilengineeringandcompositestosolvetheproblemsofthetraditionalsteelsportinggoodsandexpandedmil

7、itaryapplications．Theycables，compositebridgehasbeenthefourthgenerationwerealwaysregardedasthemostsuitablematerialsforofstayed—cablebridge．However，thecablevibrationhasbuildinglong—spanbridgesduetotheoutstandingme．beenthemostmaininfluencefactorsofbri