Abstract
ABSTRACT The stiffened composite panels are widely used in various engineering structures, but their nondestructive testing methods face certain limitations. The traditional wave field imaging method faces difficulties when applied for damage detection in complex composite structures. An improved adjacent wave subtraction (AWS) method is proposed in this research to visualize the multiple damage in stiffened composite panels. The method is based on the concept that the Lamb wave signals from two adjacent scanning points at healthy area are very similar and the anomalous wave, caused by the structural discontinuities including the damage, has different signal packets at any two adjacent scanning points. The S 0 mode Lamb wave signals are used in the proposed AWS method due to their faster speed in low-frequency domains. A damage index is proposed to show the signal difference of any two adjacent points, which can indicate the damage locations. A robust time window is used to enhance the anomalous wave signals and improve the damage imaging results. The prosed method is proven to be effective for damage detection in stiffened composite panels with numerical simulations and experiments.
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callSimilar Papers
Disclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
