TY - JOUR A1 - Lugovtsova, Yevgeniya A1 - Bulling, Jannis A1 - Boller, Christian A1 - Prager, Jens T1 - Analysis of Guided Wave Propagation in a Multi-Layered Structure in View of Structural Health Monitoring JF - Applied Sciences N2 - Guided waves (GW) are of great interest for non-destructive testing (NDT) and structural health monitoring (SHM) of engineering structures such as for oil and gas pipelines, rails, aircraft components, adhesive bonds and possibly much more. Development of a technique based on GWs requires careful understanding obtained through modelling and analysis of wave propagation and mode-damage interaction due to the dispersion and multimodal character of GWs. The Scaled Boundary Finite Element Method (SBFEM) is a suitable numerical approach for this purpose allowing calculation of dispersion curves, mode shapes and GW propagation analysis. In this article, the SBFEM is used to analyse wave propagation in a plate consisting of an isotropic aluminium layer bonded as a hybrid to an anisotropic carbon fibre reinforced plastics layer. This hybrid Composite corresponds to one of those considered in a Type III composite pressure vessel used for storing gases, e.g., hydrogen in automotive and aerospace applications. The results show that most of the wave energy can be concentrated in a certain layer depending on the mode used, and by that damage present in this layer can be detected. The results obtained help to understand the wave propagation in multi-layered structures and are important for further development of NDT and SHM for Engineering structures consisting of multiple layers. KW - Lamb waves KW - Composite KW - Ultrasonic Testing KW - Numerical Modelling KW - Pressure Vessels PY - 2019 UR - https://nbn-resolving.org/urn:nbn:de:kobv:b43-494385 DO - https://doi.org/10.3390/app9214600 VL - 9 IS - 21 SP - 4600 PB - MDPI CY - 4052 Basel, Switzerland AN - OPUS4-49438 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER -