Considering anisotropy in guided wave tomography for composite laminates
- Recently, various guided wave tomography algorithms have been developed to map structural changes from remote locations. The focus has been on structures made of isotropic materials and little work has been done on structures made of anisotropic materials. Primary complication to implement tomography in composite laminates is associated with the complex forward model to accurately simulate the 3-D guided wave propagation. In this study, we demonstrate that guided wave propagation can be approximated by an equivalent 2-D acoustic model. It is based on finite-difference discretization method in which the wave-field is parameterized by phase velocity and dimensionless anisotropic parameters. The reconstruction of defects is based on a full-waveform inversion algorithm and was implemented on the data obtained from finite element simulations. Results on a localized stiffness defects in composite plates with various layups demonstrate the attractiveness of the proposed methodology.
Autor*innen: | M. Ratassepp |
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Koautor*innen: | J. Rao, X. Yu, Z. Fan, Yevgeniya Lugovtsova, Jens Prager |
Dokumenttyp: | Vortrag |
Veröffentlichungsform: | Präsentation |
Sprache: | Englisch |
Jahr der Erstveröffentlichung: | 2019 |
Organisationseinheit der BAM: | 8 Zerstörungsfreie Prüfung |
8 Zerstörungsfreie Prüfung / 8.4 Akustische und elektromagnetische Verfahren | |
DDC-Klassifikation: | Naturwissenschaften und Mathematik / Chemie / Analytische Chemie |
Freie Schlagwörter: | Lamb waves; Multilayered structures; Ultrasonic Guided Waves |
Themenfelder/Aktivitätsfelder der BAM: | Chemie und Prozesstechnik |
Veranstaltung: | International Symposium on Nondestructive Characterization of Materials (ISNCM 2019) |
Veranstaltungsort: | Portoroz, Slovenia |
Beginndatum der Veranstaltung: | 17.09.2019 |
Enddatum der Veranstaltung: | 19.09.2019 |
Verfügbarkeit des Dokuments: | Datei im Netzwerk der BAM verfügbar ("Closed Access") |
Datum der Freischaltung: | 18.12.2019 |
Referierte Publikation: | Nein |
Eingeladener Vortrag: | Nein |