Frequency spectral analysis on AE signals of damage mechanisms in PE/PE composites，2009先进纤维与聚合物材料国际学术会议（ICAFPM，10.21-10.24，上海）-中国聚合物网,论文下载

Frequency spectral analysis on AE signals of damage mechanisms in PE/PE composites

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关键词：

Acoustic emission PE/PE laminates Frequency feature Damage
mechanisms

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577K

所属学科：

分子表征

来源：

2009先进纤维与聚合物材料国际学术会议（ICAFPM，10.21-10.24，上海）

简介：

Theobjectiveofpresentstudyistoinvestigatefrequencyfeaturesofacousticemission(AE)signalsgeneratedbydifferentdamagemechanismsinPE/PEselfreinforcedlaminates.TwokindsofspecimenpureresinandPE/PEunidirectionallaminatewerepreparedtoobtaindesireddamagemodes.AEsignalsofmatrixdamage,interfacedebondingandfiberbreakagecanbeactivatedbyquasi-statetensionofLDPEresin,[90]laminateand[0]laminaterespectively.FastFouriertransform(FFT)whichcanchangeAEwaveformsfromtimedomaintofrequencydomainwasusedtoobtainfrequencyinformationofdamagemodes.Accordingtofrequencyspectralanalysis,differenceoffrequencybetweendamagemechanismsisobvious.Frequencydistributionofmatrixdeformationandmatrixfracturearebelow100kHzwithpeakfrequencyat40kHz.Frequencydistributionofmatrixcrackingisabout100-300kHzwithpeakfrequencyat230kHz.Frequencyofinterfacedebondinghastwomainregions50-150kHzand200-300kHzwithpeakfrequencyat100kHz.Frequencyoffiberbreakagemainlydistributeduring200-300kHzwithpeakfrequencyat220kHz.TheresultrevealedfrequencyfeaturecouldbeappliedtoidentifydamagemechanisminPE/PEcomposites.

作者：

WANG Xu,ZHANG Huipin,YAN Xiong

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2010-03-17 11:35:57

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