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Impact induced delamination detection and quantification with guided wavefield analysis
| Content Provider | NASA Technical Reports Server (NTRS) |
|---|---|
| Author | Tian, Zhenhua Seebo, Jeffrey P. Yu, Lingyu Leckey, Cara A. C. |
| Copyright Year | 2015 |
| Description | This paper studies impact induced delamination detection and quantification by using guided wavefield data and spatial wavenumber imaging. The complex geometry impact-like delamination is created through a quasi-static indentation on a CFRP plate. To detect and quantify the impact delamination in the CFRP plate, PZT-SLDV sensing and spatial wavenumber imaging are performed. In the PZT-SLDV sensing, the guided waves are generated from the PZT, and the high spatial resolution guided wavefields are measured by the SLDV. The guided wavefield data acquired from the PZT-SLDV sensing represent guided wave propagation in the composite laminate and include guided wave interaction with the delamination damage. The measured guided wavefields are analyzed through the spatial wavenumber imaging method, which generates an image containing the dominant local wavenumber at each spatial location. The spatial wavenumber imaging result for the simple single layer Teflon insert delamination provided quantitative information on delamination damage size and location. The location of delamination damage is indicated by the area with larger wavenumbers in the spatial wavenumber image. The impact-like delamination results only partially agreed with the damage size and shape. The results also demonstrated the dependence on excitation frequency. Future work will further investigate the accuracy of the wavenumber imaging method for real composite damage and the dependence on frequency of excitation. |
| File Size | 325110 |
| Page Count | 9 |
| File Format | |
| Alternate Webpage(s) | http://archive.org/details/NASA_NTRS_Archive_20150009468 |
| Archival Resource Key | ark:/13960/t3wt3ph5h |
| Language | English |
| Publisher Date | 2015-03-08 |
| Access Restriction | Open |
| Subject Keyword | Aircraft Design, Testing And Performance Composite Materials Position Location Wave Propagation Delaminating Imaging Techniques Wave Interaction Carbon Fiber Reinforced Plastics Excitation Laminates Composite Structures Damage Impact Damage Ntrs Nasa Technical Reports Server (ntrs) Nasa Technical Reports Server Aerodynamics Aircraft Aerospace Engineering Aerospace Aeronautic Space Science |
| Content Type | Text |
| Resource Type | Article |
