Impactdamageimagingforcomposites

basedonmatchingpursuitmethod

FENG Yong-ming; ZHOU Li

doi:10.11883/1001-1455(2012)03-0259-08

Volume 32 Issue 3

May 2014

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Article Navigation > Explosion And Shock Waves > 2012 > 32(3): 259-266

FENG Yong-ming, ZHOU Li. Impactdamageimagingforcompositesbasedonmatchingpursuitmethod[J]. Explosion And Shock Waves, 2012, 32(3): 259-266. doi: 10.11883/1001-1455(2012)03-0259-08

Citation:

FENG Yong-ming, ZHOU Li. Impactdamageimagingforcomposites basedonmatchingpursuitmethod[J]. Explosion And Shock Waves, 2012, 32(3): 259-266. doi: 10.11883/1001-1455(2012)03-0259-08

FENG Yong-ming, ZHOU Li. Impactdamageimagingforcompositesbasedonmatchingpursuitmethod[J]. Explosion And Shock Waves, 2012, 32(3): 259-266. doi: 10.11883/1001-1455(2012)03-0259-08

Citation:

FENG Yong-ming, ZHOU Li. Impactdamageimagingforcomposites basedonmatchingpursuitmethod[J]. Explosion And Shock Waves, 2012, 32(3): 259-266. doi: 10.11883/1001-1455(2012)03-0259-08

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Impactdamageimagingforcomposites basedonmatchingpursuitmethod

doi: 10.11883/1001-1455(2012)03-0259-08

1.
StateKeyLaboratoryof MechanicsandControlof MechanicalStructures,

Funds:

NationalNaturalScienceFoundationofChina(11172128,61161120323)

More Information

Corresponding author: ZHOU Li
Publish Date: 2012-05-25

Abstract

Abstract

AdamageimagingmethodusingLambwaveandmatchingpursuitmethodforcontinuous on-linemonitoringofcompositewasproposed.First,asignalprocessingmethodisdevelopedusing matchingpursuits.ItcandecomposeLambsignalsintoalinearexpansionofseveralchirpletatoms withafastoperationspeed.Second,therelationshipbetweenLambwavesdispersionandchirplets chirprateisdeveloped.Itshowsthatthechirpletatomcanmatchthedispersionpulseaccurately,and itcanbeusedtoidentifythemodesofLambwaves.Third,accordingtothesignaldifferencebefore andafterdamage,adamageindexcanbegetfromthedifferencesintheenergycharacteristicsoflamb wave.TheimagethatindicatesthedamagecanbeobtainedbytheRAPIDalgorithm.Theexperimentalresultsdemonstratetheapplicabilityandeffectivenessoftheproposedmethod.
- solid mechanics,
- damageimaging,
- matchingpursuit,
- composite materials,
- structural healthmonitoring