TY - CONF A1 - John, Sebastian A1 - Duffner, Eric A1 - Mair, Georg T1 - Degradation and damage analysis of composite pressure vessels via experimental modal analysis T2 - NOVEM 2023 Noise and Vibration: Emerging Methods N2 - For mobile gas storage systems, the application of type IV pressure vessels is state of the art. Type IV tanks consist of an inner polymer liner fully wrapped with fibre-reinforced plastic (FRP). Because of the complex fabric of the FRP as well as a difficulty estimable interaction behaviour between the single components under load, there are still no satisfying non-destructive testing methods to assess the current state of failure nor to estimate the level of degradation accurately and economically. At BAM division 3.5, analysing the ageing process of mobile composite pressure vessels is a major task to ensure safe usage over the whole lifetime. In this context, key aspects of our ongoing research activities are the invention of new test procedures and the development of accurate lifetime prediction models. In order to determine the level of degradation or damage, one meaningful non-destructive approach is to analyse the structural dynamic behaviour via an experimental modal analysis (EMA). Over the last few years, different types and sizes of composite pressure vessels have been tested in several research projects. The presented paper gives an insight into how to extract and interpret modal parameters and how to fit them to the results of residual strength tests. T2 - NOVEM Conference 2023 CY - Auckland, New Zealand DA - 09.01.2023 KW - Composite material KW - Pressure vessel KW - Degradation KW - Modal analysis PY - 2023 SP - 57-1 EP - 57-6 AN - OPUS4-58062 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER -