TY - GEN
T1 - Structural health monitoring and damage detection in composite panels with multiple stiffeners
AU - Liu, Yingtao
AU - Yekani Fard, Masoud
AU - Kim, Seung Bum
AU - Chattopadhyay, Aditi
AU - Doyle, Derek
N1 - Funding Information:
This material is based on research sponsored by the Army Research Laboratory and managed by the Air Force Research Laboratory under agreement number FA9453-09-1-0316. The U.S. Government is authorized to reproduce and distribute reprints for governmental purposes notwithstanding any copyright notation thereon. The views and conclusions contained herein are those of the authors and should not be interpreted as necessarily representing the official policies or endorsements, either expressed or implied, of Army Research Laboratory, Air Force Research Laboratory or the U.S. Government.
PY - 2011
Y1 - 2011
N2 - The propagation characteristics of Lamb waves in stiffened carbon fiber polymer matrix composite panels are investigated. In particular, the group velocities of S0 and A0 modes are calculated, the attenuation of Lamb waves induced by stiffeners and delaminations are evaluated, and the angular dependence of group velocity is subsequently examined. A two step damage detection and characterization approach, which uses both pulse-echo and pitch-catch active sensing schemes, is presented for the identification of delaminations in the stiffened composite panels. The matching pursuit decomposition algorithm is used for the representation of the sensor signal in the time-frequency domain. The delaminations are detected by identifying the converted Lamb wave modes in the time-frequency domain. The results confirm that the proposed approach is able to effectively identify the presence of seeded delaminations in complex composite structures.
AB - The propagation characteristics of Lamb waves in stiffened carbon fiber polymer matrix composite panels are investigated. In particular, the group velocities of S0 and A0 modes are calculated, the attenuation of Lamb waves induced by stiffeners and delaminations are evaluated, and the angular dependence of group velocity is subsequently examined. A two step damage detection and characterization approach, which uses both pulse-echo and pitch-catch active sensing schemes, is presented for the identification of delaminations in the stiffened composite panels. The matching pursuit decomposition algorithm is used for the representation of the sensor signal in the time-frequency domain. The delaminations are detected by identifying the converted Lamb wave modes in the time-frequency domain. The results confirm that the proposed approach is able to effectively identify the presence of seeded delaminations in complex composite structures.
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U2 - 10.2514/6.2011-1859
DO - 10.2514/6.2011-1859
M3 - Conference contribution
AN - SCOPUS:84872479506
SN - 9781600869518
T3 - Collection of Technical Papers - AIAA/ASME/ASCE/AHS/ASC Structures, Structural Dynamics and Materials Conference
BT - 52nd AIAA/ASME/ASCE/AHS/ASC Structures, Structural Dynamics and Materials Conference
T2 - 52nd AIAA/ASME/ASCE/AHS/ASC Structures, Structural Dynamics and Materials Conference
Y2 - 4 April 2011 through 7 April 2011
ER -