Damage monitoring of CFRP stiffened panels under compressive load using FBG sensors

FBG sensors were embedded in each of two CFRP stiffened panels fabricated by VaRTM. Low-velocity impacts were applied to one of the panels in order to compare the methods of monitoring impact events using FBG sensors. The main impact damage was an interlaminar delamination inside the skin, which cou...

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Bibliographic Details
Published inComposite structures Vol. 94; no. 3; pp. 813 - 819
Main Authors Takeda, Shin-ichi, Aoki, Yuichiro, Nagao, Yosuke
Format Journal Article
LanguageEnglish
Published Elsevier Ltd 01.02.2012
Subjects
Buckling
Carbon fiber reinforced plastics
CFRPs
Compression
Damage
FBG sensors
Impact damage
Monitoring
Panels
Sensors
SHM
Spectra
Stiffened panels
SHM
Compression
CFRPs
Stiffened panels
FBG sensors
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Summary:FBG sensors were embedded in each of two CFRP stiffened panels fabricated by VaRTM. Low-velocity impacts were applied to one of the panels in order to compare the methods of monitoring impact events using FBG sensors. The main impact damage was an interlaminar delamination inside the skin, which could be observed by an ultrasonic C-scan. A monitoring method using the full spectral signals was more effective in evaluating the impact damages in detail than that using the center wavelength. Following the impact tests, buckling behaviors were investigated under compressive loading using FBG sensors and surface-attached strain gauges. The FBG sensors could evaluate strain changes resulting from buckling behaviors under relatively low compressive loading. They could also evaluate damage growth until the final failure and difference of buckling behaviors between panels with and without impact damages.
Bibliography:ObjectType-Article-1
SourceType-Scholarly Journals-1
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content type line 23
ISSN:0263-8223
1879-1085
DOI:10.1016/j.compstruct.2011.02.020